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2014 Electric Service Manual

1. INC TOWN No No Hansell Hardy Hartford Harvey Hastings Hawleyville Henderson Hepburn Holly Springs Holmes Holstein Hornick Horton Hospers Hudson Hudson Whlse Hull Humboldt Ida Grove Imogene Inwood lowa City Ireton Irwin Jacksonville James Janesville Jesup Joetown Johnston Jolley Kalo Kalona Keomah Village Kesley Kingsley Kirkman Kirkville Kiron Knierim Knoke Knoxville Lacey Lake City Lakeside Lakeview Whsle Lanesboro Larrabee Latimer Lavinia Lawton Le Mars LeClaire Leighton Lewis Liberty Center Lidderdale Linwood COUNTY Franklin Humboldt Warren Marion Mills Page Mills Page Woodbury Wright Ida Woodbury Bremer Sioux Black Hawk Black Hawk Sioux Humboldt Ida Fremont Lyon Johnson Sioux Shelby Shelby Plymouth Bremer Buchanan Johnson Polk Calhoun Webster Washington Mahaska Butler Plymouth Shelby Wape
2. eCURRENT TRANSFORMERS 7 uU CTS aa NOTE 2 SL BRACING OR GUYING Rid 5 FOR CLEARANCES J z m I CONNECTORS L 1 METER SERVICE SEE FIG 1 TT MAY BEN FOR CLEARANCES INSIDE OR OUTSIDE ra METER SOCKET 18 40 SEE FIG 33 6 MAX 4 MIN walcz czu Y MMA ANIMA h ie GROUND ING ELECTRODE CONDUCTOR TO THE SERVICE PANEL IS NOT TO BE PLACED SEE FIG 6 FOR GROUNDING INSIDE SERVICE ENTRANCE REQUIREMENTS CONDUIT SERVICE CHARACTERISTICS INSTRUMENT TRANSFORMER INSTRUMENT QUANTITY TRANSFORMER VOLTAGE SIZE CT s PT s WIRING 1 PHASE 120 240 V 3 WIRE OVER 400 A THRU 800 3 PHASE 120 240 V 4 WIRE OVER 400 A THRU 800 A 3 PHASE 120 208 V 4 WIRE OVER 400 A THRU 1000 A Refer to Fig 35 Note 8 Effective April 1 2015 67 FIGURE 21 TYPICAL COMMERCIAL INDUSTRIAL SERVICE ENTRANCE METERING WITH CABINET MOUNTED INSTRUMENT TRANSFORMERS PREFERRED INSTALLATION 1 Company will provide and install all marked items The customer shall be responsible for all other items 2 Current transformers and potential transformers are furnished by the Company and installed by the customer 3 Theinstrument transformer enclosure s shall be mounted outdoors Consult your Company representative for an approved location 4 Mount current transformers and potential transformers so that the
3. ALTERNATE EXIT Effective April 1 2015 Er LOAD FIG 32 C 79 __ NEUTRAL 5 _ MIN INSULATEC WIRE FIGURE 32 INSTRUMENT TRANSFORMER METERING GREATER THAN 400 A 1 Meter sockets shall not be mounted more than 35 circuit feet from instrument transformers 2 Meters will be furnished and installed by the Company 3 Test switches shall be furnished by the customer See Appendix D for specifications 4 Meter sockets shall be bonded to the grounding electrode conductor 5 Insulated bushings are required on all conduits 6 Working space in front of service entrance equipment and meter sockets shall be in accordance with NEC Section 110 26 7 Spring clip type add on 5th terminals are not allowed 8 Customer supplies and installs meter socket and test switch 9 Meter sockets shall be weatherproof for exterior locations 10 See Appendix C 1 for instrument transformer requirements 11 cabinet mounted CT s shall be bar type 12 The instrument transformer enclosure s shall be mounted outdoors Consult your Company representative for an approved location 13 The 1 conduit from the meter socket enclosure to the instrument transformer enclosure must be continuous and contain less than three 90 degree bends The use of any conduit body fitting LB LL LR etc is prohibited Effective April 1 2015 80 FIGURE 33 NOTES INSTRUMENT TRANSFORMER M
4. SERVICE BRACE DROP OPPOSE PULL OF SERVICE DROP ADDRESS SEE NOTE 2 AS REQUIRED TO OBTAIN Z ZL IN FIG 1 METER ww DISCONNECT AND OVERCURRENT DEVICE SEE NOTE 7 sv 4 SEE FIG 6 FOR GROUND ING REQUIREMENTS SERVICE CHARACTERISTICS 1 PHASE 120 240 V 3 WIRE 200 A MAX 3 PHASE 120 240 V 4 WIRE 200 A MAX 3 PHASE 120 208 V 4 WIRE 200 A MAX 3 PHASE 277 480 V 4 WIRE 400 A MAX Note Contact your Company representative for service availability Disconnect required for 480 V temporary service For other temporary service requirements contact your Company representative Effective April 1 2015 53 FIGURE 10 TYPICAL UNDERGROUND TEMPORARY SERVICE 1 The Company will provide and install all marked items The customer shall be responsible for all other items 2 An address sign that is visible from the street shall be posted on the meter setting It shall be made of materials that provide a clearly legible address for the duration of the setting 3 The service lateral conductors shall be suitable for direct burial 4 The customer shall provide and install the service lateral conductors in a manner that provides a sufficient length of conductor coiled at the transformer secondary handhole or secondary pedestal and end fittings reference Detail A for connection to the power source by the Company 5 With the exception
5. OR AS TT APPROVED BY GOVERNING oo ee OM L AUTHORITY SERVICE LATERAL E B CONDUCTOR SEE d INSULATED BUSHING FIGURE 8 FOR CONDUIT REQUIREMENTS _ GROUNDING ELECTRODE ur METALLIC WATER PIPING METALLIC WA N THE GROUND ROD IS NOT 2 ALLOWED ANY CLOSER MIN doa NEM 4 FEET TO THE SERVICE RISER wm CONDUIT TO PREVENT DAMAGE WHEN THE UNDERGROUND ESSA SERVICE LATERAL CONDUCTOR IS INSTALLED ed COPPER BOND ING con U AROUND WA METER ATTACHED WITH SEE FIG 6 SUITABLE CLAMPS SIZE METER WIRING CONDUIT SIZE 200 AMAX FIG 27 2 1 2 400 A MAX FIG 28 3 The Company will provide and install all marked items The customer is responsible for all other items Services smaller than 200 amp are allowed but a minimum 200 amp underground meter socket and 2 1 2 conduit are both required Effective April 1 2015 57 FIGURE 13 TYPICAL UNDERGROUND RESIDENTIAL SERVICE METER PEDESTAL 1 The company will provide and install all marked items The customer shall be responsible for all other items 2 An address lot number or trailer number must be permanently posted on the outside of the cabinet below the meter 3 For free standing units backfill around pedestal shall be well tamped along the full 36 inch minimum length of the setting 4 Any 120 volt outlet located on pedestal shall have GFCI protec
6. The Company will be responsible for the following e Furnish the instrument transformers e Furnish and install the meters e Furnish and install wiring leads from instrument transformers to meter socket The customer will have the following responsibilities e Furnish install and maintain the related Cabinets Conduits Meter sockets Test switches see Appendix D Cabinets and conduits shall be grounded per NEC Article 250 e Provide protective bushings on conduit ends e Make service entrance conductor connections to the instrument transformers e Install pull rope in conduit on instrument transformer installations Meter and instrument transformer cabinets must be equipped with padlockable handle or other means to padlock or seal Key locks will not be approved For service sizes 1200 amps and below current transformers required for metering shall be installed in a separate cabinet reference Appendices C 3 C 4 C 5 C 6 With Company approval current transformers may be installed in transformers for services above 1200 amps See your local distribution engineering contact The potential transformers shall be installed in a separate cabinet reference Appendix C 1 item 2 They will not be allowed in the secondary compartment of the padmount transformer Continued on next page Effective April 1 2015 33 9 0 METERING EQUIPMENT continued Demand If the customer desires the use of a Company met
7. BREAK BEFORE ACTION A 2 IF LOCATED AT SERVICE FROM GENERATOR ENTRANCE MUST MEET BRANCH CIRCUIT OVER ALL SERVICE ENTRANCE CURRENT PROTECTION REQUIREMENTS TRANSFER SWITCH BETWEEN GENERATOR ALL UNGROUN NDUCTORS ADEQUATE FOR ONE AND LOAD 3 ALL UNGROUNDED CONDUCTO CIRCUIT MUST BE SWITCHED SIMULTANEOUSLY NEUTRAL NOT SWITCHED STANDBY GENERATOR CONNECTED TO ONE CIRCUIT ONE LINE DIAGRAM FIGURE 17A FIGURE 17B SOURCE EN LOAD FROM POWER MAIN SWITCH AND LINE FUSES OR CIRCUIT TRANSFER BREAKER SWITCH METER J SWITCHES AND FUSES OR CIRCUIT BREAKERS FOR FEEDERS TO 1 BUILDINGS Ol DISCONNECT TRANSFER I x SWITCH ae SWITCH Ri DISTRIBUTION PANEL BOARD IN BUILDING STANDBY GEN STANDBY GENERATOR POLE MOUNTED SERVICE ENTRANCE WITH CONNECTED AT SERVICE ENTRANCE ON BUILDING FIGURE 170 SELF CONTAINED METER FIGURE 17 Tf the transfer switch is located ahead of the main switch the transfer switch shall be service entrance rated The position of the transfer switch with respect to the main switch can vary from that shown Contact your Company representative to be sure that the proposed transfer switch installation meets the Company requirements Effective April 1 2015 62 FIGURE 17 METERING SEQUENCE REQUIREMENTS NON RESIDENTIAL INSTALLATIONS NOTICE CONTACT COMPANY DETERMINE THE PROPER METERING SEQUENCE REQUIRED HOT SEGUENCE 3 120 V NON NETWORK 120 208 V 120 240
8. ME TER REMOVABLE COVER FOR ACCESS TO UTILITY CONNECTION TERMINALS SERVICE LATERAL CONDUIT MUST BE SECURELY ATTACHED TO METER SOCKET USING EITHER TWO LOCKNUTS AND AN INSULATED BUSHING DISCONNECT AND QR A THREADED HUB OVERCURRENT DEVICE SEE NOTE 6A PROVISIONS FOR SEAL LOCK OR BOLT TO SECURE ENCLOSURES CUSTOMER QWNED SERVICE ENTRANCE CABLE FOUNDAT ON 2 TO 6 METAL EDGES AT CABLE ENTRANCE SHALL BE MI EQUIPPED TO PREVENT DAMAGE TO CABLES INSULATED BUSHING 4 THE GROUND ROD 15 STABILIZING FOOT NOT ALLOWED ANY CLOSER OR INTEGRAL STAKE lt THAN 4 FEET Tus GROUND ELECTRODE a Lee t CONDUCTOR TO THE WHEN THE UNDERGRO SERVICE LATERAL SERVICE PANEL SERVICE LATERAL CONDUCTOR CONDUCTORS 48 RZ IS INSTALLED MIR 0 lt SEE FIG 6 I FOR GRDUNDING 48 REQUIREMENTS 1 SERVICE CHARACTERISTICS VOLTAGE SIZE METER WIRING 1 PHASE 120 240 V 3 WIRE 400 A MAX FIG 27 or FIG 28 Effective April 1 2015 59 FIGURE 14 TYPICAL RURAL SERVICE METER POLE 1 Company will provide and install all marked items The customer shall be responsible for all other items 2 The attachment of the customer s metering equipment and distribution wiring will not be allowed on Company poles 3 Thecustomer shall be responsible for providing and installing a pole that is in suitable condition for extended service
9. MIN M 2 L SERVICE EQUIPMENT GROUNDING ELECTROD CONDUCTOR TO THE GROUNDING ELECTRODE SERVICE ENTRANCE CONDUCTOR BONDED TO CONDUIT METALLIC WATER PIPING 2 SY MIN SEE FIG 6 ache FOR GROUNDING REQUIREMENTS NS U COPPER BONDING CONDUCTOR AROUND WATER METER ATTACHED WITH SUITABLE CLAMPS SERVICE CHARACTERISTICS 1 PHASE 120 240 V 3 WIRE 200 A MAX FIG 27 1 PHASE 120 240 V 3 WIRE 400 A MAX FIG 28 The Company will provide and install all marked items The customer is responsible for all oth er items Effective April 1 2015 56 FIGURE 12 TYPICAL UNDERGROUND RESIDENTIAL SERVICE ME TER SOCKET METER N N ALTERNATE LOCATION RT 7 FOR SERVICE EQUIPMENT Y 4 REIN SERVICE LATERAL CONDUIT pe MUST SECURELY ATTACHED TO METER SOCKET USING EITHER 3 TWO LOCKNUTS AND AN INSULATED BUSHING OR A THREADED HUB 6 MAX 4 MIN THE GROUNDING ELECTRODE m CONDUCTOR TO THE SERVICE 0 PANEL IS NOT TO BE PLACED INSIDE SERVICE ENTRANCE CONDUIT _ SERVICE EQUIPMENT GALVANIZED RIGID CONDUIT 4 18 MIN SECURELY FASTENED TO WALL 30 MIN RIGID NON METALLIC SCHEDULE 80 CONDUIT MAY BE USED AS PERMITTED BY
10. Now reads The potential transformers shall be installed in a sepa rate cabinet reference Appendix C 1 item 2 They will not be allowed in the secondary com partment of the padmount transformer 11 0 Parallel Generation Operation Minimum Clearances for Services 480 V and Be low General Figure 1 Notes Item E Replaced second paragraph with For distributed generation installations solar wind etc contact local distribution engineering personnel for infor mation and requirements For these installations the meter must be located outside Changed Refer to Figure 2 to Refer to Figure 2D Clearance Requirements Around Grain Bins NESC Rule 234F Figure 5 Item 1 Changed 22 kVA to 22 kV Grounding Requirements Figure 6 Notes Item 1 Combined sentences now reads grounding of electric installations shall meet the require ments of NEC Article 250 requirements of the Company as shown in these construction stand ards adhere to the local jurisdictional require ments and all applicable codes Allowable Service Con ductor Sizes Typical Underground Temporary Service Effective April 1 2015 Figure 7 first paragraph Figure 11 116 Added sentence No conductor sizes above 750 kcmil will be allowed including compact and compressed conductors Changed graphic notation to A conduit end fitting shall be provided See Detail A Also changed Detail A
11. Potential transformers will not be allowed in the secondary compartment of the padmount transformer They may be installed in the current transformer cabinet if the cabinet is sized appropriately 2 Allinstrument transformer cabinets shall have 3 4 plywood backing installed Pgs 82 83 99 3 Instrument transformer cabinets shall be mounted so the top of the cabinet is not more than 6 above the final grade and the bottom is not less than 2 feet above the final grade App C 1 5 4 Meter sockets shall not be mounted more than 35 circuit feet from the instrument transformers 5 Covers on all instrument transformer cabinets shall be hinged with heavy duty pin type hinges Specifications for Meter Test Switches See Appendix D pg 104 Optional Instrument Transformer Metering Cabinet See Appendix E pg 105 Meter Pedestal Installation See Appendix F pg 106 Effective April 1 2015 110 APPENDIX H ELECTRIC SPACE HEATING DEVICE SPECIFICATIONS General Electric space heating devices shall e Meet all applicable local state and federal laws in regard to the installation and use of the electric space heating devices e Have UL approval or other comparable safety rating Device Electric space heating devices shall Specifications e Be specifically desig
12. Spill Prevention Control and Countermeasures SPCC Plans and Oil Containment for Custom er Furnished Pads for 3 Phase Pad Mounted Transformers All Sizes Spill Prevention Control and Countermeasures SPCC Plans and Oil Containment for Custom er Furnished Pads for 3 Phase Pad Mounted Transformers All Sizes Spill Prevention Control and Countermeasures SPCC Plans and Oil Containment for Custom er Furnished Pads for 3 Phase Pad Mounted Transformers All Sizes Concrete Pad Specifica tion 3 Phase Pad Mounted Transformer Appendix B 1 Appendix B 1 Appendix B 1 Appendix B 2 Changed Appendix B 1 to Appendix B 2 Last sentence To discuss an alternative contain ment design contact local MidAmerican Energy Company distribution engineering personnel Graphic changes 3 River Rock Screened Change Appendix B 2 to Appendix B 3 94 Construction Details Cus tomer Furnished Pads for 3 Phase Pad Mounted Transformers 75 500 kVA Appendix B 3 Change Appendix B 3 to Appendix B 4 Effective April 1 2015 119 APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL SECTION Construction Details Customer Furnished Pads for 3 Phase Pad Mounted Transformers 75 500 kVA ITEM REVISION Appendix B 3 Graphic changes Widened primary box to 16 to accommodate larger conduits or more conduits Centered conduits and moved to the back of the box out not s
13. The customer has the option to use the CT size and spacing information shown in Appendix C 2 along with the NEC tables to determine the minimum size required as directed by the NEC or to use the simplified enclosure size reference shown on Appendix C 3 through C 6 The customer shall contact a Company representative for approval of exceptions to these arrangements or when it is preferred to mount the CTs and PTs in the same enclosure The minimum CT enclosure depth will vary depending on entrance size as follows Entrance Depth 1200 A or smaller 10 Larger than 1200 A 12 The minimum size of PT enclosure shall be 22 wide x 22 high x 10 deep The top of instrument transformer enclosures shall be no more than 6 feet and the bottom no less than 2 feet above the final grade centered as best as possible Working space in front of enclosures shall be in accordance with NEC Section 110 26 A hinged cover with heavy duty pin type hinges on the side of the box is required with a latch no more than 5 feet above the floor If the enclosure is 48 inches or wider the cover shall be split and hinged at each side hinged covers shall be installed with sufficient clearance to open at least 90 degrees All enclosures shall have provisions for sealing and or padlocking capabilities enclosures shall be weatherproof Aluminum or stainless steel is recommended Securing covers in place with multiple screws is not acceptable Company
14. Woodbury Humboldt Harrison Bremer Polk Scott Marion Pocahontas Polk Calhoun Poweshiek Woodbury Shelby Floyd Jasper Scott Warren Cherokee Fremont Black Hawk Montgomery Marion Calhoun Crawford Polk Harrison Scott Fremont Sioux Cerro Gordo Calhoun Monona Carroll Audubon Polk Palo Alto Humboldt Sac Woodbury Warren Polk Continued on next page INTRODUCTION continued Communities Iowa Schaller Sac lowa Schleswig Crawford lowa No Scotch Ridge Warren Iowa No Seney Plymouth lowa Sergeant Bluff Whlse Woodbury lowa Shambaugh Page Sheffield Franklin lowa Sheldon O Brien Shell Rock Butler lowa Shenandoah Page lowa Sidney Fremont lowa Silver City Mills lowa Sioux City Woodbury lowa Sloan Woodbury lowa Smithland Woodbury Soldier Monona lowa Somers Calhoun lowa No Spring Hill Warren Iowa St Charles Madison Iowa No StJoseph Kossuth Iowa St Marys Warren lowa Storm Lake Buena Vista Stout Butler Iowa No Strahan Mills lowa Struble Plymouth lowa No Sulphur Springs Buena Vista Iowa No Summerset Warren Iowa Sutherland O Brien Iowa No Swan Marion Iowa Tabor Fremont Iowa No Taintor Mahaska Templeton Carroll lowa No Tenville Page lowa Thor Humboldt lowa Thurman Fremont lowa No Tracy Marion lowa Treynor Pottawattamie lowa Truesdale Buena Vista lowa Turin Monona Iowa No Twin Lakes Calhoun Iowa No Ulmer Sac Iowa Underwood Pottawattamie Iowa No Unio
15. and all other terminations 7 The neutral shall be available in the instrument transformer enclosure for connection of the meter potential leads The neutral connector shall be UL listed and insulated from the instrument transformer cabinet 8 In unusual conditions contact your Company representatives 9 PT cabinets required only for 277 480 V installations See Appendix C 1 for dimensions Contact a Company representative for details 10 In a metering device defined as a meter socket or CT cabinet one conductor may be secured in a lug multiple lugs each with a single conductor may be used to parallel conductor to a device or may run to other devices in the same area 11 CT s shall be installed so they may be removed without access to the back of the cabinet Effective April 1 2015 83 FIGURE 35 THIS PAGE WAS INTENTIONALLY LEFT BLANK Effective April 1 2015 84 APPENDICES REQUIREMENTS FOR METER MOUNTING EQUIPMENT 1 ENCLOSURE MATERIALS Meter sockets shall meet Company specifications and shall UL Listed Shall be steel plated or made of galvanized steel aluminum The finish shall be tough non fading and have a long service life 2 INSULATING MATERIALS Bus Support Shall be high strength and track resistant Sheet Insulation High dielectric strength Insulating materials meet UL requirements 3 MOUNTING BASES Shall be high impact strength track resistant 4 SAFE
16. 0 pg 21 Multiple Meters 240 See Section 6 0 pg 21 Meter Poles mec PE See Section 6 0 pg 21 Me racc See Section 6 0 pg 21 Overhead Primary Meterinsg See Section 6 4 pg 27 Underground Primary Meterins See Section 6 5 pgs 28 amp 29 Metering Equipment Section 9 0 pgs 32 33 amp 34 1 Bar type current transformers will be used in a current transformer cabinet See your Company representative for exceptions Grounding Requirements See Figure 6 pgs 46 amp 47 Metering SequE CE E See Figure 18 pg 63 Typical Commercial Industrial Overhead Service See Figure 21 pgs 66 amp 67 Typical Commercial Industrial Underground Service See Figure 22 pgs 68 amp 69 Instrument Transformer Metering See Figure 33 pgs 80 amp 81 Requirements for Meter Mounting Equipment Appendix A pg 86 1 Meter sockets shall be of a ringless type and have a one piece cover 2 Automatic bypasses are prohibited Instrument Transformer Enclosures Appendix C 1 and C 2 pgs 98 amp 99 1
17. 1 5 1 4 SEE RUE 232 NESC 15 ft z 4 SEE RULE 232 NESC GRADE NON LOAD ING SIDE V HEIGHT OF HIGHEST FILLING OR PROBING PART ON GRAIN BIN H V 18 ft LOADING SIDE NON LOAD ING SIDE 15 ft RULE 232 AREA NESC RULE 232 AREA NESC AREA OF SLOPED CLEARANCE AREA OF SLOPED CLEARANCE 1 Overhead conductors should not be routed through the clearance envelope as shown above For exceptions or for voltages exceeding 22 kV see NESC Rule 234F 2 The customer shall contact the Company representative to review clearances between grain bins and Company facilities Effective April 1 2015 44 FIGURE 5 CLEARANCE FOR CONDUCTORS INSTALLED OVER OR NEAR SWIMMING AREAS REFERENCE NESC 234E Swimming Pools Conductors installed within 10 horizontally from the pool edge or diving platform must maintain basic vertical clearances as depicted in the following table This rule does not apply to a pool fully enclosed by a solid or screened permanent structure Beaches and Waterways Restricted to Swimming Where rescue poles are used by lifeguards at supervised swimming beaches the required basic vertical and horizontal clearances shall be as shown on the following table OPEN SUPPLY CONDUCTORS UNGUARDED GROUNDED OR RIGID LIVE INSULATED CLEARANCES TO SWIMMING AREAS PARTS 0 750V GUYS NEUTRAL SECONDARY COND CABLE 0 750V 750V 15kV ALL 34 5kV CLEARANCE IN ANY DIRECTION FROM
18. 120 240 V 4 WIRE 400 A MAX 3 PHASE 120 208 V 4 WIRE 400 A MAX SOURCE SOURCE HIGH PHASE METER SOCKET Dam gt HHUH DLT UG UE El N Y NO 12 LOAD INSULATED WIRE RP snes oe 1 120 240 V DELTA 120 208 V WYE FIG 30 A FIG 30 B 1 If the service size is 400 amps or less self contained metering will be used 2 meter sockets shall meet Company specifications see Appendix A 3 Working space of not less than 36 inches in front of service entrance equipment and meter sockets and 30 inches wide shall be maintained in accordance with NEC Section 110 26 Reference page 21 4 When using aluminum conductors wire brush the conductors and apply oxide inhibitor on all connections 5 neutral if insulated shall be identified by a white or gray covering or white paint or tape Reference page 30 6 high phase of a 120 240 V installation shall be identified by orange color either insulation paint or tape in accordance with NEC Section 110 15 and Section 230 56 Reference page 30 7 The high phase wild leg of a 120 240 V installation must be on the right hand terminals of the self contained meter socket Reference page 30 8 Commercial installations require a manual clamping jaw lever bypass Effective April 1 2015 75 FIGURE 30 SELF CONTAINED METER SOCKET WIRING 3 PHASE 277 4
19. 87 LOCATION OF CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS ALL SIZES BUILDING WALL BARRIER WALL OR SCREENING STRUCTURE SEE NOTE 5 3 0 MIN SEE NOTE 4 a MOAT SEE NOTE 9 GROUND ROD SLEEVE 1 METERING CONDUIT MAY BE REOUIRED CABLE CONDUIT BOX OUTS CONDUITS SHALL BE CENTERED ALONG THE BACK EDGE WITHIN TT 10 0 L y BOX 0UTS lt TRAFFIC PROTECTION POSTS BY CUSTOMER AS REQUESTED BY COMPANY lt E TUM SEE NOTE 7 Three phase transformer pads must be l Installed by the customer at the customer s expense Ongoing maintenance and repair to the pad are the responsibility of the customer Constructed in a manner satisfactory to the Company in a mutually agreed upon location with hard surface access and unobstructed work space for large vehicles The installation of a screening or barrier structure may be required by your local governing authority It is the customer s responsibility to determine if a barrier structure is required If screening or a barrier structure is required or installed as an optional feature the clearance limitations of notes 2 and 3 must be maintained 37 0 minimum clearance is to be maintained from pad sides and back to the nearest structure or plantings level graded 10 0 minimum clearance is to be maintained from the front of pad to the nearest fixed structure or plantings If a
20. Commercial installations require a manual clamping jaw lever bypass Effective April 1 2015 72 FIGURE 27 SELF CONTAINED METER SOCKET WIRING 1 PHASE 120 240 V 3 WIRE 320 A SOCKET 400 A ENTRANCE SOURCE O a WEATHERPROOF HUB NN NN 57 i oj O IO 56 1 o O L NEUTRAL NEUTRAL ve Due E ao nN ALTERNATE 7 Na LJ ow OY LOAD SOURCE LOAD OVERHEAD SOURCE UNDERGROUND SOURCE FIG 28 A FIG 28 B The meter sockets shall meet Company specifications see Appendix A 2 Working space in front of service entrance equipment and meter sockets shall be in accordance with NEC Section 110 26 Refer to page 21 for Meter Clearances 3 When using aluminum conductors wire brush the conductors and apply oxide inhibitor on all connec tions The neutral shall be grounded at the main disconnect in accordance with the NEC Please contact your Company repres
21. Company representative to be sure the proposed standby transfer switch and meter socket installation meets the Company requirements If a standby generator is connected without an approved transfer switch service will be disconnected until such switch is installed Safety of personnel demands this requirement Effective April 1 2015 35 11 0 PARALLEL GENERATION OPERATION General Operation of any customer owned generating equipment in parallel with the Company s system is prohibited without express written agreement between the customer and the Company For distributed generation installations solar wind etc contact local distribution engineering personnel for information and requirements For these installations the meter must be located outside Effective April 1 2015 36 DIAGRAMS MINIMUM CLEARANCES FOR SERVICES 480 V AND BELOW The following general clearances under any and all conditions include MidAmerican Energy Company s requirements and interpretations derived from the NESC Rule 234 and the NEC Section 230 24 Refer to these codes for specific conditions not shown in Figure 1 Clearances for utility owned service drops and cables beyond the perimeter of the customer s building will be controlled by the NESC requirements The following alphabetical designations and respective dimensions apply to Figure 1 on the opposite page Clearances shown are for multiplex duplex triplex and quadruplex service dro
22. Customer Supplied Equipment Unless stated otherwise in the rate price schedule or tariff the Company will normally permit only one service per customer Section 230 70 of the NEC requires a service to have a disconnecting means The main switch and fuses or circuit breakers shall be of ample capacity to e Carry the load e Safely interrupt the available fault current at the particular location If fault current information is required contact your Company representative for the available fault current If the customer s load is larger than that which can be protected with standard fusing the customer will be required to install a disconnecting means acceptable to the Company The service disconnecting means shall be installed at a readily accessible location per NEC and shall comply with applicable local electrical codes and shall be e Outside of the building or structure or e Inside nearest the point of entrance of the service conductors or e Onthe meter pole when applicable An overcurrent device fused or breakered not be required adjacent to the metering point but e Shall be installed in accordance with the NEC at each entrance served through the meter The customer must provide install and maintain the additional equipment necessary for the service including the meter socket The customer must provide a service attachment of adequate strength to support the Company s service conductor
23. EXTEND 1 MAX ABOVE TOP 6x6 6 6 WWF PAD REINFORCEMENT 2 LAYERS SILT FENCE 2 FABRIC sese POLYETHYLENE FILI 1 2 THICK SAND LEVELING BED NO ROCK CORNER PIERS 4 10 DIA m REINFORCING ST ASTM A 185 CONCRETE fc gt 3500 PSI AT 28 DAYS EEL ASTM A 615 40 6x6 6 6 WELDED WIRE FABRIC WWF SECTION B B SOIL gt 95 PROCTOR DENSITY OR 55 PSI PB Effective April 1 2015 ne APPENDIX B 5 CONSTRUCTION DETAILS CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS 1500 2500 kVA 3 0 B lt m 10 0 gt le 1 6 3 6 3 6 1 6 77 1 gt 3 6 6 6 6 REINFORCEMENT 2 LAYERS 10 DIA PIERS K 3 0 6 PLACES 3 8 s PLAN VIEW 4 RE RODS 8 BOTTOM 9 6 LONG 8 PLACES BENT TIE RE RODS GROUND ROD 6 PLACES SLEEVE 1 1 2 CHAMFER TJ 1 METERING CONDUIT BEVEL MAY BE REQUIRED TOP EDGE 100 ORDO f A m 9 OONO Pe 9 A PRIMARY SECONDARY S Y L s TUUS 2 1 4 PRIMARY CONDUITS SHALL CENTERED ALONG BACK EDGE OF BOX OUT ALL CONDUITS SHALL EXTEND 1 MAX ABOVE TOP OF PAD 1 CONCRETE OVER od SECONDARY CONDUITS SHALL BE POSITIONED STARTING AT THE BACK EDGE OF THE BOX OUT AND FILLING TOWARDS THE FRONT ALL Ls OR 8 OF
24. Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa INC TOWN 2 ZZZZ Buck Grove Buffalo Whsle Burnside Bussey California Junction Callender Whsle Calumet Camanche Capitol Heights Carbon Carbondale Carlisle Whlse Carmel Carnarvon Carnes Carney Carroll Carson Castana Cedar Chapin Charles City Charter Oak Chatsworth Cherokee Churchville Clare Clarinda Clarion Clarksville Cleghorn Climbing Hill Clive Coalville Coburg Coin Colfax College Springs Columbia Conger Coralville Corley Cornelia Correctionville Cosgrove Council Bluffs Craig Crescent Cumming Cushing Cylinder Dakota City Dallas Center Danbury Davenport Dedham Defiance Deloit COUNTY Crawford Scott Webster Marion Harrison Webster O Brien Clinton Polk Adams Polk Warren Sioux Sac Sioux Polk Carroll Pottawattamie Monona Mahaska Franklin Floyd Crawford Sioux Cherokee Warren Webster Page Wright Butler Cherokee Woodbury Dallas Polk Webster Montgomery Page Jasper Page Marion Warren Johnson Shelby Wright Woodbury Johnson Pottawattamie Plymouth Pottawattamie Warren Woodbury Palo Alto Humboldt Dallas Woodbury Scott Carroll Shelby Crawford Continued on next page INTRODUCTION Continued Communities STATE INC TOWN Iowa Denver Whlse Iowa Des Moines Iowa Desoto I
25. P 3 RIVER ROCK 1 1 2 CHAMFER BEVEL TOP EDGE POLYETHYLENE FILM 1 2 THICK SAND LEVELING BED NO ROCK 90 ELBOWS 48 RADIUS T 1 2 X 10 GROUND ROD BY COMPANY SECTION A A 4 BENT TIE RE RODS 6 PLACES s EXSSSSSSNI 3 4 X 9 SLEEVE PLASTIC OR GALV STEEL CONDUITS SHALL EXTEND 1 MAX ABOVE TOP OF PAD 6x6 6 6 WWF REINFORCEMENT 2 LAYERS RIVER ROCK 4 RE RODS SEE PLAN VIEW 10 DIA PIERS 6 PLACES 4 SECTION Effective April 1 2015 96 DESIGN DATA CONCRETE fc gt 3500 PSI 28 DAYS 4 REINFORCING STEEL ASTM A 615 40 6x6 6 6 WELDED WIRE FABRIC WWF ASTMA 185 SOIL gt 95 PROCTOR DENSITY OR 55 PSI PBV APPENDIX B 6 THIS PAGE WAS INTENTIALLY LEFT BLANK Effective April 1 2015 97 10 11 12 13 Effective April 1 2015 98 HINGED INSTRUMENT TRANSFORMER ENCLOSURES The fabrication requirements and minimum sizes for enclosures shall conform to NEC Article 312 The size of separate potential transformer PT enclosures when required is indicated in Note 4 below The remaining information applies to the minimum size for current transformer CT enclosures Space requirements for wire bends as specified is NEC Tables 312 6 A and 312 6 B will affect these dimensions depending on the wire exit arrangement
26. POLES ER TEST SWITCH 6 POLE METER TEST SWITCH A JU T TOP c 6 TOP c 6 9 9 O O O O Va va Ia Ic Icr HINGE END DOW 10 POLE METER TEST SWITCH TOP O Ol O O O O O O O O O O HINGE END Va Vb N Ib Ibr Ic Icr DOWN Effective April 1 2015 104 APPENDIX D OPTIONAL COMBINATION CT METERING CABINET UTILITY APPROVED METER FITTING SUITABLE LINE AND LOAD TERMINALS TO BE FURNISHED BY THE CUSTOMER TYPE 3R ENCLOSURE CURRENT TRANSFORMERS FURNISHED BY UTILITY CQ AND INSTALLED BY CUSTOMER TYPICAL HANDLE WITH SEALING DEVICE TYPICAL GROUND ING TERMINAL FRONT INTERIOR VIEW FRONT ENCLOSED VIEW THESE CABINETS MUST BE LISTED BY UNDERWRITERS LABORATORIES INC AS METERING TRANSFORMER CABINETS AND BEAR THEIR MARK SYSTEM BUS POSITION METER FITTING 4 W 13 JAW Effective April 1 2015 105 APPENDIX E METER PEDESTAL INSTALLATION FOR INSTRUMENT TRANSFORMER METERING 37 6 RAS 1 RANI 3000 PSI CONCRETE Ls Customer furnishes and installs the following equipment 1 6 Pedestal support 3 inch minimum size standard steel pipe or galvanized steel conduit or 2 inch minimum size uni stru
27. SOURCE SOURCE L MINIMUM No 12 INSULATED WIRE ne NEUTRAL LOAD L LOAD 1 PHASE 120 V 2 WIRE 1 PHASE 120 240 V 3 WIRE 60 A MAX 100 A 200 A FIG 27 A FIG 27 B UNDERGROUND SERVICE IMUM No 12 MIN INSULATED WIRE NEUTRAL D DY it DL LOAD SOURCE SOURCE LOAD 1 PHASE 120 V 2 WIRE 1 PHASE 120 240 V 3 WIRE 60 A MAX 100A 200 A FIG 27 C FIG 27 D CAUTION Source conductors shall be positioned along the sides of the meter socket utilizing adequate bending radius to provide maximum clearance from other socket terminals Source conductors shall be looped to the top jaws shown in figures 27 c and d 1 The meter sockets shall meet Company specifications see Appendix A 2 Working space in front of service entrance equipment and meter sockets shall be in accordance with NEC Section 110 26 Refer to page 21 for Meter Clearances 3 When using aluminum conductors wire brush the conductors and apply oxide inhibitor on all connections 4 When the neutral is not continuous through the meter socket a dual lug neutral connector shall be used 5 Useone of the two outside conduit knockouts for the underground service riser lateral 6 Spring clip type add on 5th terminals are not allowed 7
28. THE 1 EDGE OF POOL BASE OF DIVING PLATFORM 22 6 227 0 23 0 25 0 25 6 OR ANCHORED RAFT CLEARANCE IN ANY DIRECTION TO THE DIV Nus nS A 3 VERTICAL CLEARANCE OVER ADJACENT AS REQUIRED IN CLEARANCES ABOVE GROUND OR ROADWAYS LAND REF NESC 232 4 UNDERGROUND DIRECT BURIED CABLE 5 FROM POOL OR AUXILLARY EQUIPMENT REF NESC 351C1 Effective April 1 2015 45 FIGURE 5A GROUNDING REQUIREMENTS 1 Allgrounding of electric installations shall meet the requirements of NEC Article 250 requirements of the Company as shown in these construction standards adhere to local jurisdictional requirements and all other applicable codes 2 grounding electrode system shall consist of the provisions specified in NEC Section 250 50 Section 250 52 and Section 250 56 The Company does not allow the use of gas piping for grounding of electrical services However interior metallic gas piping upstream of equipment service shutoff valves which may become energized shall be electrically continuous and bonded to any grounding common electrode as defined by the NEC 3 Ground rods when used shall be at least 8 feet long and 1 2 inch in diameter if copper copperclad or stainless steel or 5 8 inch in diameter if galvanized or steel The top of the rod shall be 2 to 6 inches below ground level In certain instances additional grounding electrodes may be required see NEC Sect
29. V 271 480 Vt11 SELF CONTAINED CUSTOMER DISCONNECT METER OR WITH QVERCURRENT NSTRUMEN TRANSFORMER S PROTECTION LOVER 400 A 1 WITH INSTRUMENT TRANSF RMERS COLD SEGUENCE 3 120 V CUSTOMER DISCONNECT WITH OVERCURRENT NETWORK 120 208 V PROTECTION AREAS 277 480 V 1 SIX METERS DR NON RETKORK gt 2774480 V DISCONNECT SELF CONTAINED SELF CONTAINED 4 METER OR NSTRUMEN TRANSFORMERS 2 1 WITH INSTRUMENT TRANSF ORMERS 2 SEPARATE INSTRUMENT TRANSFORMERS ARE NOT REOUIRED WITH SELF CONTAINED METERING 3 EXIT LIGHTS FIRE PUMPS AND OTHER EMERGENCY SERVICES AHEAD OF THE MAIN MUST HAVE OVERCURRENT PROTECTION AND BE METERED 14 DISCONNECT MAY BE FUSED OR UNFUSED DEPENDING ON WHAT 5 NEEDED TO MEET MEC AND NEC FAULT CURRENT REQUIREMENTS FOR THE PARTICULAR APPLICATION NETWORK AREA DEFINITIONS Geographical areas exist in the downtown business districts of Carroll Council Bluffs Davenport Des Moines Moline Rock Island Sioux City and Waterloo in which service and related equipment must meet certain special requirements Your Company representative must be contacted to determine if the service location is within this area Effective April 1 2015 63 FIGURE 18 TYPICAL OVERHEAD COMMERCIAL INDUSTRIAL SERVICE WITH SELF CONTAINED METER SERVICE DEADEND CLAMP SERVICE DROP CO
30. code and National Electrical Safety Code NESC contain provisions relating to Company installations and work practices The National Electrical Safety Code is a registered trademark of the Institute of Electrical and Electronic Engineers Inc New York New York 10016 The NEC is registered trademarks of the National Fire Protection Association Inc Quincy MA 02269 Manual Does This manual does not cover Not Cover Specific Problems Additional Copies of the Electric Service Manual e Electric utility installations that are under the exclusive control of the Company for the purpose of Metering Generation Control Transformation Transmission Distribution Associated work practices of the Company in exercise of its function as a utility If you desire to discuss specific problems not covered or resolved by this manual contact your Company representative For additional copies of the 2014 Electric Service Manual contact your Company Representative An electronic version of the 2014 Electric Service Manual is also available online at www midamericanenergy com under the For Contractors tab Continued on next page Effective April 1 2015 2 INTRODUCTION continued Communities STATE INC TOWN lowa Ackley lowa Ackworth lowa Adel lowa Alleman lowa Allison lowa Altoona Alvord lowa No Anderson lowa Ankeny lowa Arcadia Archer lowa Aredale lowa Arion A
31. from the Company the customer may be allowed to make the underground service installation e Customer installed Company owned cable shall be approved by and installed in a manner satisfactory to the Company AII cable must be installed between 30 and 42 below final grade e Customer installed residential and duplex underground services will be owned and maintained by the Company per applicable tariff e The customer will be required to pay the applicable income tax surcharge For commercial industrial and other services including residential properties with multiple meters in one location and cross functional buildings the service will be furnished installed owned and maintained by the Customer The Company will terminate the cables in the transformer Network services are typically furnished installed owned and maintained by the Company Contact local distribution engineering personnel to see if network service is available Underground services for mobile home parks will be furnished installed owned and maintained by the Customer Continued on next page Effective April 1 2015 23 6 2 UNDERGROUND SERVICE continued Placement of Transformer Transformer Pads UG Service Installed by Customer in OH Areas Requirements Consult your local governing authority regarding placement of transformers adjacent to buildings and building openings It is necessary to have adequate and unobstructed space
32. from the nearest edge of the roof At a distance of 6 feet from the mast the service conductors must have a vertical clearance of 3 feet over the roof If the mast is more than 4 feet from the edge of roof see Figure 2 C 7 Roof must be classified as not readily accessible to pedestrians SPECIAL CONDITIONS REQUIRED FOR USING CLEARANCES SHOWN IN FIGURE 2 8 Voltage between open conductors is 300 volts or less and for multiplex conductors up to 750 volts 9 Roof must be classified as not readily accessible to pedestrians SPECIAL CONDITIONS REQUIRED FOR USING CLEARANCES SHOWN IN FIGURE 2 D 10 For multiplexed conductors up to 750 volts 11 Special conditions required by Figure 2 B and Figure 2 C are not met Service passes over but is not attached to building Effective April 1 2015 40 FIGURE 2 NOTES SERVICE CONDUCTOR CLEARANCES OVER ROOFS FURNACE F IREPLACE OR SEWER VENT SERVICE DROP REA NEC CONDUCTORS aa S BE A 222 ES 6 9 4 J FIG 2 A FEG CB ROOF TOP VIEW 4 OR LESS So y X SERVICE DROP CONDUCTORS MAST MUST BE WITHIN 4 OF NEAREST Z SERVICE DROP Q CONDUCTORS n D 9 YS SERVICE DROP CONDUCTORS CONDITION D MIN Mul ROOF SLOPE NOT READILY ACCESSIBLE TO PEDESTRIANS 3 5 FT FOR ROOFS NOT READILY ACCESSIBLE TO PEDESTRIANS ROOF SLOPE READILY AND MASTS MO
33. in accordance with NEC Section 110 26 5 When using aluminum conductors wire brush the conductors and apply an oxide inhibitor on all connections 6 The neutral if insulated shall be identified by a white or gray covering or white paint or tape Reference page 30 7 The high phase wild leg of a 120 240 V installation shall be identified by orange color either insulation paint or tape Reference page 30 8 A 480 VOLTS identification decal or permanently painted orange or yellow letters shall be applied in a conspicuous location on the front exterior surface of the meter socket enclosure Lettering is to be legible and 3 4 minimum height 9 Commercial installations require a manual clamping jaw lever bypass Effective April 1 2015 78 FIGURE 32 NOTES SELF CONTAINED METER SOCKET WIRING 3 PHASE 120 208 120 240 V 4 WIRE 320A SOCKET 400A ENTRANCE NEUTRAL _ NCUTRAL ALTERNATE ALTERNATE EXIT OVERHEAD SOURCE LOAD FIG 32 MIN 212 INSULATED WIRE UNDERGROUND SOURCE F16 32 8 SELF CONTAINED METER SOCKET WIRING 3 PHASE 277 480 V 4 WIRE 320A SOCKET 400A ENTRANCE DISCONNECT NEUTRAL 14
34. is prohibit Fourth bullet point removed first sentence Residential meter sockets rated at 200 amps or less require a horn bypass Changed graphics add ground rod sleeve to pri mary and secondary compartments 88 Location of Customer Furnished Pads for 3 Phase Pad Mounted Transformers Sizes Appendix B 1 Item1 Added sentence Ongoing maintenance and re pair to the pad are the responsibility of the cus tomer 88 Location of Customer Furnished Pads for 3 Phase Pad Mounted Transformers Sizes Appendix B 1 Item 5 Changed wording of Item 5 to add maximum depths conduits shall extend 5 0 beyond the pad and screening structure if used and the locations of the ends of primary conduits shall be identified Primary conduit shall be installed be tween 42 and 48 below final grade Secondary conduit shall be installed between 30 and 42 below final grade 88 Location of Customer Furnished Pads for 3 Phase Pad Mounted Transformers Sizes Appendix B 1 Item 7 Removed diagonally from first sentence 88 Location of Customer Furnished Pads for 3 Phase Pad Mounted Transformers Sizes Appendix B 1 Item 8 Changed 2 screened river rock to 3 Effective April 1 2015 118 APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL 2014 MANUAL PAGE SECTION ITEM REVISION 89 89 89 90 93
35. life to support the service drop conductors and equipment The pole shall be in an accessible location out of the way of farm equipment traffic The pole is to meet or exceed the following minimum requirements Length Sufficient to maintain proper clearances see Figure 1 Setting Depth 5 feet Top Diameter 5 5 Inches Treatment Pentachlorophenol or equivalent 4 Contact your Company representative to determine the need for an approved down guy 5 The Company can provide and install at the customer s expense a pole and if necessary the down guy 6 customer s service riser metering equipment and wiring shall conform to NEC requirements 7 service weatherhead is to be located above the service attachment point to insure positive drip loop 8 When facilities for a standby generator are installed refer to Figure 17 9 Locations of fuel storage tanks and dispensing devices shall be in accordance with NEC Table 514 3 B 1 and Table 514 3 B 2 10 The customer shall install a disconnecting means incorporating an overcurrent protection device on the load side of the meter Reference NEC 230 90 A 11 The service conductors should not cross adjoining property or livestock areas 12 Metered and unmetered conductors shall not be installed in the same conduit 13 Reference Meter Clearances page 21 Effective April 1 2015 60 FIGURE 15 NOTES TYPICAL RURAL SERVICE METER POLE SPACE FOR SECURITY LIGHT S
36. meter and the finished grade is to be 6 feet maximum and 4 feet minimum J The dimension between the hinged side of a door and the nearest surface of the meter is to be door width plus 6 inches K Aclear working space as shown by the box in the diagram of not less than 36 inches in front of the meter and 30 inches wide shall be maintained at all times NEC Section 110 26 L The horizontal clearance from the nearest side of the meter socket enclosure to any structural protrusion shall be 3 inches minimum M Horizontal distance of electric meter to gas regulator vent is 3 feet minimum Effective April 1 2015 38 FIGURE 1 NOTES MINIMUM CLEARANCES FOR SERVICES 480 V AND BELOW OVERHEAD SERVICE 2 A A 9 IE LOCATE ELECTRIC METER ON THE FRONT WALL OR WITHIN THE FRONT 1 2 OF SIDE WALL 3 2 5 e ni A a o 12 N o o PREFERRED M LOCANON gt la 6 y WALKWAY e s 1 3 251 ALLOWABLE METER LOCATION SRVEWAY io GENERAL NOTES 1 The house number must be clearly posted and readable from the street 2 service wea
37. mounted on the right or left side of the CT cabinet Also added an alter nate location for meter socket mounting to graphics Effective April 1 2015 gt APPENDIX J
38. of pedestal type settings the support shall be a square or round treated timber post 4 inch x 4 inch minimum or equivalent 6 The customer shall provide install and connect all grounding equipment 7 All temporary circuits shall have ground fault circuit interrupters GFCI NEC Section 590 6 8 All customer provided equipment shall be weatherproof 9 If the temporary meter setting is located adjacent to a padmount transformer secondary pedestal or secondary handhole it shall be between 5 to 7 feet away from the enclosure 10 Depending on local regulations Figure 14 may be used for temporary services CUSTOMERS TO CALL 48 HOURS BEFORE DIGGING TO LOCATE UNDERGROUND FACILITIES In Illinois call 800 892 0123 In Iowa call 800 292 8989 In South Dakota call 800 781 7474 In Nebraska call 800 331 5666 Effective April 1 2015 54 FIGURE 11 NOTES TYPICAL UNDERGROUND TEMPORARY SERVICE ADDRESS SEE NOTE 2 METER ENCLOSURE WITH 3 METER SOCKET Y METER DISCONNECT AND METER OVERCURRENT DEVICE SOCKET SEE NOTE 7 LIQUID TIGHT FLEXIBLE METAL CONDUIT SHALL BE PROTECTED FROM PHYSICAL DAMAGE A CONDUIT END FITTING 4 DISCONNECT AND OVERCURRENT DEVICE GROUND WIRE POST SEE NOTE 5 PROTECTIVE 24 CONDUIT GROUND WIRE RJ HIN MIN SHALL BE PROVIDED PUSBING SEE FIG 6 SEE DETAIL A la FOR GROUNDING FIG 3 MIN SEE FIG 6 REQUIREMENTS FOR GROUND
39. order to accommodate the load Each customer should recognize the possible need to upgrade an existing electric service entrance in order to properly serve the new load Up to 2 horsepower May be operated on 120 volts 2 horsepower and larger Must be operated on 208 or 240 volts 5 horsepower and smaller May be operated without special means of reducing starting current Larger than 5 horsepower May be permitted with Company approval if Company facilities are adequate to supply the service and e The use of such motor does not interfere with quality of service to other customers Single phase motors rated 230 240 volts may not operate satisfactorily on 208 volts Check manufacturer s specifications Continued on next page Effective April 1 2015 14 4 0 MOTORS AND SPECIAL EQUIPMENT Continued Larger than 5 hp operated from May be allowed only with Company approval single phase service by use of phase converter 15 horsepower and over May be permitted with Company approval if e Company facilities are adequate to supply the service and e The use of such motor does not interfere with quality of service to other customers Company may require customer to limit the motor starting current by use of reduced voltage starters or other acceptable means Reduced voltage starting requirements for the larger motors single phase or poly phase must be equivalent to the maximum allowable across the line starting c
40. polarity marks are orientated on the line side 5 The instrument transformer enclosure s shall be bonded to the grounding electrode conductor or neutral 6 Working space from electrical equipment shall be in accordance with NEC Section 110 26 7 When supplying size information from the SERVICE CHARACTERISTICS Table on Figure 22 O H Max refers to services supplied from the pole mounted transformers and U G Max refers to services supplied from padmounted transformers Effective April 1 2015 68 FIGURE 22 NOTES TYPICAL COMMERCIAL INDUSTRIAL SERVICE ENTRANCE METERING WITH CABINET MOUNTED INSTRUMENT TRANSFORMERS PREFERRED INSTALLATION SERVICE DEADEND CLAMP SERVICE DROP CONDUCTORS ry BRACING OR GUYING AS REQUIRE SEE FIG 2 x SE FOR CLEARANCES 4CONNECTORS TAAL WEATHERPROOF INSTRUMENT SEE FIG 1 TRANSFORMER FOR CLEARANCES ENCLOSURE S SEE APPENDIX TT FOR REQUIREMENTS SERVICE j EQUIPMENT 1 NS pe METER C OR OUTSIDE SOCKET 1 FIG 33 6 MAX 6 MAX 4 MIN 24 Ll MIN ao opa ue WMT MMM MEME FIA Z 2 TO 6 SEE NEC T OCE THE GROUND I
41. preferred arrangement Effective April 1 2015 100 APPENDIX C 3 CURRENT TRANSFORMER ENCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A cl CT BAR WITH TERMINAL J 9 91 B CONNECTOR A D M NEUTRAL MINIMUM CT ENCLOSURE SIZE REQUIREMENTS DIMENSIONS L W D NUMBER OF WIRES PER TERMINAL CONNECTION INCHES INCHES INCHES INCHES INCHES 26 26 10 29 27 10 32 29 10 28 26 10 30 27 10 32 29 10 35 31 10 30 26 10 33 29 10 36 31 10 39 33 10 32 26 10 35 29 10 38 31 10 41 33 10 1 The above W dimensions are for three CT installations Subtract 8 to obtain the W dimensions for two CT installations 34 27 10 36 29 10 39 31 10 42 33 10 46 43 124 2 Dimensions followed a may be reduced as follows if aluminum wire is used Reduce L by 2 and reduce W by 7 All other dimensions apply when aluminum or copper wire is used 3 Refer to Appendix C 1 for general information 4 Two or three CT versions of this arrangement may be installed horizontally as shown or vertically or opposite hand Rotate the page around until the diagram fits the preferred arrangement Effective April 1 2015 101 APPENDIX C 4 CURRENT TRANSFORMER ENCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A CT BAR WITH TERMINAL 4 CONNECTOR 8 U NEUTRAL U MINIMUM CT ENCLOSURE SIZE REQUIREMENTS D
42. service location with the customer or his representative The Company may refuse connection to any service entrance not installed in an approved location Continued on next page Effective April 1 2015 17 5 0 SERVICE INFORMATION continued Customer If a customer contribution is required a Company representative will make Contribution arrangements with the customer for payment Inspection When the installation is ready for service the customer should contact the and Approval Company and if required the appropriate governmental authority to request inspection s When accepted by a Company representative and if required approved by the appropriate governmental authority the service and meter will be installed Recreational Service to vacation and recreational vehicle parks will normally be Vehicle Parks e Supplied through one metering installation or as determined by Company representative Billed to the park owner operator on the applicable general service or commercial industrial rate Any variation to the above will require approval by a Company Representative Service will be extended as provided in the Company s tariff Pole Nothing shall be attached to Company poles without a contractual agreement Attachments with the Company Effective April 1 2015 18 6 0 SERVICE AND SERVICE ENTRANCES General One Service Disconnection Means Location of Disconnection Means Overcurrent Device
43. smaller shall be identified by a continuous white or gray outer finish or by three continuous white stripes on other than green insulation along its entire length Larger than No 6 An insulated grounded conductor larger than 6 AWG shall be identified either by a continuous white or gray outer finish or by three continuous white stripes on other than green insulation along its entire length or at the time of installation by a distinctive white marking at its terminations This marking shall encircle the conductor or insulation A neutral conductor may be uninsulated in accordance with NEC Section 230 41 except for neutral jumpers as indicated in Figures 27 29 30 31 and 32 High Phase High phase wild leg conductor identification shall be marked orange or by Conductor other effective means and shall be in accordance with NEC Section 110 15 and Section 230 56 The high phase wild leg conductor must be located on the RIGHT HAND TERMINALS OF SELF CONTAINED METER SOCKETS See Figure 30 of this book and NEC Section 408 3 e Multiple When multiple conductors per phase are needed for a service the phase wires Conductors must be identified with colored tape so the proper grouping can be determined Per Phase The tape must be installed below the termination height so the grouping remains identifiable after cutting the cables to their final height Effective April 1 2015 30 8 0 SERVICE CONDUCTOR SIZES AND CONNECTIONS Con
44. 0 75 50 50 50 2 1 2 or 3 150A 100 75 75 75 3 1 2 or 4 150A 150A 125A 100 75 400A 2 1 2 or 3 100 100 75 50 50 3 1 2 or 4 125 100 100 75 75 APPLICATION AND CONDITIONS FOR ABOVE TABLE 1 maximum service drop lengths shown are for triplex and quadruplex services attached to unguyed riser masts Marked span lengths indicated that 25 ft must be subtracted from the indicated span length if service is quadruplex 2 Conductor supports for spans longer than the maximum service drop lengths for a given condition listed in the above table must be guyed or braced to withstand the following maximum actual service drop tension Entrance Size Maximum Actual Tension 100A 1500 Lbs 200A 2000 Lbs 400A 3500 Lbs The customer should consider providing additional strength as a Safety Factor NEC Section 230 28 3 service conductor type and span length will be selected by the Company representative as part of their inspection to determine the service entrance location This information will be made available to the customer on request 4 EMT thinwall conduit is not acceptable for any portion of the service mast Conduit couplings are not allowed above the roofline or less than 2 feet below the soffit line Reducing down to a smaller conduit size must adhere to local jurisdictional requirements Effective April 1 2015 43 FIGURE 4 CLEARANCE REQUIREMENTS AROUND GRAIN BINS NESC RULE 234F
45. 5 46 FIGURE 6 NOTES GROUNDING REQUIREMENTS THE GROUNDING ELECTRODE CONDUCTOR TO THE SERVICE PANEL IS NOT TO BE PLACED INSIDE SERVICE ENTRANCE CONDUIT AW NL TIERE ST Sey ear EU M TO 6 CLAMP SUITABLE FOR DIRECT BURIAL GROUND ROD CLAMP SHALL BE VISIBLE FOR INSPECTION 8 4 GROUND ING ELECTRODE THE GROUND ROD ds MIN _ CONDUCTOR BONDED TO NOT ALLOWED ANY CLOSER z METALLIC WATER PIPING THAN 4 FEET TO THE SYSTEM WHEN THE UNDERGROUND MIN o ND Df SERVICE LATERAL CONDUCTOR pue eem IS INSTALLED Y A EQ WU 4 6 A VA RETI COPPER BONDING CON DUCTOR AROUND WATER METER ATTACHED WITH SUITABLE CLAMPS SEE NEC ARTICLE 250 FOR EUREN LOCAL JU N WILL CONCRETE ENCASED ELECTRODE DETERMINE ACCEPTABLE UFER GROUND METHOD OF GROUNDINC Effective April 1 2015 47 FIGURE 6 ALLOWABLE SERVICE CONDUCTOR SIZES Allowable ampacities of insulated conductors rated 0 2000 Volts 60 to 90 C 140 to 194 F not more than three conductors in raceway or cable or earth directly buried based on ambient temperature of 30 C 86 F No conductor sizes above 750 kcmil will be allowed includin
46. 80 V 4 WIRE 400 A OR LESS SOURCE A HE Fala qI lI lt RT D jen 0 EN el D CUSTOMER PANEL 211 480 V WYE Effective April 1 2015 DISCONNECT SWITCH MINIMUM No 12 INSULATED WIRE METER SOCKET ENCLOSURE 1 If the service size is 400 amps or less self contained metering will be used 2 The meter sockets shall meet Company specifications See Appendix A 3 277 480 V self contained meter settings are limited to installations rated 400 A or less 4 A disconnect switch shall be installed on the source side immediately adjacent to each 277 480 V self contained meter setting in a cold sequenced switch meter load configuration The switch shall have provisions for padlocking in the open position and for installing a Company seal in the closed position The disconnect may be fused or unfused depending on what is needed to meet MEC and NEC fault current requirements for the particular application It is the customer s responsibility to determine if the disconnect switch should be fused or unfused Reference page 63 5 A 480 VOLTS identification decal permanently painted orange or yellow letters shall be applied in a conspicuous location on the front exterior surface of the meter socket enclosure Lettering is to be legible and 3 4 minimum height 6 The neutral if insulated shall be identified by a white or gra
47. ASTM A 185 SOIL gt 95 PROCTOR DENSITY OR 55 PSI PBV 1 2 THICK SAND LEVELING BED NO ROCk CORNER PIERS 4 8 DIA SECTION Effective April 1 2015 94 APPENDIX B 4 CONSTRUCTION DETAILS CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS 750 1000 kVA ry B guy Exec 3 2 8 6x6 6 6 PAD REINFORCEMENT 2 LAYERS 4 RE RODS TOP amp BOTTOM 8 6 LONG 8 PLACES Sig 8 8 PLAN VIEW BENT TIE RE RODS 10 DIA CORNER PIERS 4 PLACES GROUND ROD 4 PLACES LEEVE 1 METERING CONDUIT MAY BE REQUIRED 11 2 CHAMFER BEVEL TOP EDGE O 6566 RR 2 6 o PRIMAR SECONDAHY m 2 9 UT 4 1 1 10 2 0 B PRIMARY CONDUITS SHALL BE CENTERED SECONDARY CONDUITS SHALL BE POSITIONED ALONG BACK EDGE OF BOX OUT ALL CONDUITS SHALL EXTEND 1 MAX OF PAD 1 CONCRETE OVER BACKFILL OR 8 OF PEA GRAVEL OF PAD 3 4 X 9 SLEEVE PLASTIC OR GALV 1 2 X 10 GROUND ROD BY COMPANY 2 4 DIA DUCTS 90 ELBOWS 48 RADIUS RIVER ROCK SECTION A A 3 SCREENED RIVER ROCK 1 1 2 CHAMFER BEVEL TOP EDGE 4 TIE RE RODS BENT 4 PLACES STARTING AT THE BACK EDGE OF THE BOX OUT AND FILLING TOWARDS THE FRONT ALL CONDUITS SHALL
48. CONDUCTOR FOR AC SYSTEMS SIZE OF LARGEST SERVICE ENTRANCE SIZE OF GROUNDING CONDUCTOR OR EQUIVALENT AREA FOR ELECTRODE PARALLEL CONDUCTORS CONDUCTOR ALUMINUM OR ALUMINUM OR COPPER CLAD COPPER CLAD COPPER ALUMINUM COPPER ALUMINUM 1 or 1 0 2 0 or 3 0 2 0 or 3 0 4 0 or 240 kcmil 4 i 2 Where multiple sets of service entrance conductors are used as permitted in NEC Section 230 40 Exception No 2 the equivalent size of the largest service entrance conductor shall be determined by the largest sum of the areas of the corresponding conductors of each set z TW MNT 29088 KE Serio im ie 2 _ KTW WEW mew NOTE Where the grounding electrode is a rod pipe or plate electrodes as permitted in NEC Sections 250 52 A 5 or 250 52 A 6 that portion of the grounding electrode conductor that is the sole connection to the grounding electrode shall not be required to be larger than No 6 copper wire or No 4 aluminum wire Where the grounding electrode conductor is connected to a concrete encased electrode as permitted in 250 52 A 3 that portion of the conductor that is the sole connection to the grounding electrode shall not be required to be larger than No 4 AWG copper wire See installation restrictions in NEC Section 250 64 National Electric Code and NEC are registered trademarks of the National Fire Protection Association Inc Quincy MA 02269 Effective April 1 201
49. Company will not place a transformer on a concrete pad that has not been inspected The Company has the right to request the Contractor to replace the pad due to failure to properly and timely request such inspection 5 3 2 Temperature a When air temperature is between 85 F and 90 F reduce mixing and delivery time from 1 1 2 hours to 75 minutes b When air temperature is above 90 F reduce mixing and delivery time to 60 minutes c Protect concrete work from physical damage or reduced strength which could be caused by frost freezing actions or low temperatures d When air temperature has fallen to or is expected to fall below 40 F uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less than 50 F and not more than 80 F at point of placement e At any time the ambient temperature is expected to fall below 32 F the concrete shall be immediately protected and maintained at a surface temperature of 40 F for a period of 7 days after placing f Use of frozen materials or materials containing ice or snow is not permitted Concrete shall not be placed on frozen subgrade or subgrade containing frozen materials Effective April 1 2015 92 APPENDIX B 3 CONCRETE PAD SPECIFICATION 3 PHASE PAD MOUNTED TRANSFORMERS 5 0 EXECUTION Continued Deposit concrete continuously and as nearly as practicable to its final location to avoid segregation Consolidation a Consolidate placed con
50. ERVICE 1 The Company will provide and install all marked items The customer shall be responsible for all other items 2 An address sign that is visible from the street shall be posted on the meter setting It shall be made of materials that provide a clearly legible address for the duration of the setting 3 With the exception of pedestal type settings the support shall be a square or round treated timber post 4 inch x 4 inch minimum or equivalent 4 Meters shall not be installed on trailers portable houses or any buildings not on a permanent foundation 5 The weatherhead is to be located above the level of the service attachment point 6 The customer shall provide install and connect all grounding equipment 7 120 volt circuits shall have ground fault circuit interrupters GFCI NEC Section 590 6 8 customer provided equipment shall be weatherproof 9 The service drop conductors shall not cross adjoining property CUSTOMERS TO CALL 48 HOURS BEFORE DIGGING TO LOCATE UNDERGROUND FACILITIES In Illinois call 800 892 0123 In Iowa call 800 292 8989 In South Dakota call 800 781 7474 In Nebraska call 800 331 5666 Effective April 1 2015 52 FIGURE 10 NOTES TYPICAL OVERHEAD TEMPORARY SERVICE SERVICE DEADEND CLAMP A OR LARGER EYEBOLT SERVICE prop 2 WY CONDUCTORS REFER TO FIG 1 FOR CLEARANCES 4 CONNECTORS TOP VIEW POST SEE NOTE 3
51. ERVICE WEATHERHEAD SERVICE DEADEND CLAMP Y SEE NOTE 7 SERVICE DROP CONDUCTORS DOWN GUY FURNISHED CONNECTORS GUY INSULATOR MIN 12 ABOVE GROUND POLE U Zo ZA li gadac m R A N METER S sk ZZOZ A 7 METER SOCKET UM i 8 GUY MARKER WEATHERPROOF 6 DISCONNECT DEVICE 4 MIN SEE NOTE 10 lt CUSTOMER 5 UNDER GROUND WIRING OPTIONAL j ANCHOR Dy iw SEE NEC ARTICLE 250 FOR GROUND ING REQUIREMENTS SERVICE CHARACTERISTICS 1 PHASE 120 V 2 WIRE 60 A MAX FIG 27 1 PHASE 120 240 V 3 WIRE 200 A MAX FIG 27 1 PHASE 120 240 V 3 WIRE 400 A MAX FIG 28 Other service voltages may be available Contact your Company representative Effective April 1 2015 61 FIGURE 15 STANDBY GENERATOR PROVISIONS IF A STANDBY GENERATOR SERVICE WILL BE DISCONNECTED UNTIL SUCH SWITCH IS CONNECTED WITHOUT AN APPROVED TRANSFER SWITCH IS INSTALLED SAFETY OF PERSONNEL DEMANDS THIS REQUIREMENT SEE SECTION 10 OF THIS MANUAL FOR ADDITIONAL INFORMATION TRANSFER SWITCH MAIN SWITCHES AND I FUSES OR CIRCUIT SURGE o GENERATION BREAKERS BRANCH CIRCUIT FUSES OR CIRCUIT BREAKERS CUSTOMER S EMERGENCY LOAD GENERAL REQUIREMENTS LOAD 1 DOUBLE THROW SWITCH
52. ETERING GREATER THAN 400 A 1 CONDUIT TO WEATHERHEAD WEATHERPROOF HUB OR INSTRUMENT TRANSFORMER gt FOR EXTERIOR LOCATIONS ENCLOSURE 55 CIRCUIT FT MAX ONE PIECE RINGLESS METER SOCKET WITH TEST SWITCH Ea ALTERNATE 1 E CONDUIT LOCATION had SERVICE SOCKET 1 PHASE 120 240 V 3 WIRE W 1 CT 5 TERMINAL W TEST SWITCH 1 PHASE 120 240 V 3 WIRE W 2 CTs 6 TERMINAL W TEST SWITCH 3 PHASE 4 WIRE W 3 CTs 13 TERMINAL W TEST SWITCH Effective April 1 2015 81 FIGURE 33 ME 28 INSTRUMENT TRANSFORMER WIRING 1 PHASE 120 240 V 3 WIRE GREATER THAN 400 A LOAD POLARITY MARKS SEE NOTE 1 ENCLOSURE REQUIRES A 3 4 EXTERIOR PLYWOOD BACK ING SOURCE x NEUTRAL 1 CONDUIT TO METER Y AND TEST SWITCH SOCKET 35 CIRCUIT FT MAX SEE FIG 33 4 ALTERNATE SOURCE TRANSFORMER ENCLOSURE REFER TO APPENDIX C FOR ALL INSTRUMENT TRANSFORMER ENCLOSURES SEE FIG 27 8 28 FOR SERVICES RATED 400 A OR LESS The CTs shall be mounted so that the polarity marks are arranged facing source side Insulated bushings are required on all conduits Instrument transformer enclosures shall be grounded per NEC Article 250 Covers on all instrument transformer cabinets shall be hinged on the side Bar type CTs will be used in instrument transformer enclosures and will be provided by the Company The neutral shall be available in the instrument transformer enclosure for connection
53. IMENSIONS L W D WIRE NUMBER OF WIRES PER TERMINAL CONNECTION L Lease PES zam om NEWW NEST omne armas sr I sma oo 31 29 10 35 31 10 39 33 10 45 43 12 49 45 12 31 29 10 39 33 10 45 43 124 49 45 12 53 47 12 1 The above W dimensions are for three CT installations Subtract 8 to obtain W dimensions for two CT installations 2 Dimensions followed by a may be reduced as follows if aluminum wire is used Reduce L by 2 and reduce W by 8 All other dimensions apply when aluminum or copper wire is used 3 Refer to Appendix C 1 for general information 4 Two or three CT versions of this arrangement may be installed horizontally as shown vertically or opposite hand Rotate the page around until the diagram fits the preferred arrangement Effective April 1 2015 102 APPENDIX C 5 CURRENT TRANSFORMER ENCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A CT BAR WITH TERMINAL 1 CONNECTOR NEUTRAL MINIMUM CT ENCLOSURE SIZE REQUIREMENTS DIMENSIONS L W D WIRE NUMBER OF WIRES PER TERMINAL CONNECTION NUNT ai ur c msn omae ome a omae ome 3m posee sr es s 31 32 10 35 36 10 39 40 10 45 51 12 49 55 12 31 32 10 39 40 10 45 51 124 49 55 12 53 59 12 1 The above W dimensions are for three CT installations Subtract 8 to obtain W dimensions
54. ING REQUIREMENTS SERVICE LATERAL 4 CONDUCTORS SEE NOTE 4 1 MIN 4 FIG 11 A ABOVE GRADE SERVICE LATERALS FIG 11 B BELOW GRADE SERVICE LATERALS DETAIL A END FITTINGS WITH WASHERS FOR 1 1 2 HOLES IN SECONDARY PEDESTALS USE 2 WASHER FOR 2 HOLES IN TRANSFORMERS USE 2 1 2 WASHER SERVICE CHARACTERISTICS VOLTAGE SIZE METER WIRING 1 PHASE 120 V 2 WIRE 60 A MAX FIG 27 1 PHASE 120 240 V 3 WIRE 200 A MAX FIG 27 1 PHASE 120 208 V 3 WIRE FIG 29 3 PHASE 120 208 V 4 WIRE 200 A MAX FIG 30 3 PHASE 277 480 V 4 WIRE 400 A MAX FIG 31 Note Contact your Company representative for service availability Disconnect required for 480 V temporary service Effective April 1 2015 55 FIGURE 11 TYPICAL OVERHEAD RESIDENTIAL SERVICE SEE FIG 3 SERVICE DEADEND CLAMP FOR APPROVED SERVICE DROP CONDUCTORS ATTACHMENT PROVISIONS SERVICE MAST 7 Rasa FIG 2 FOR OTHER A ATTACHMENT CONF IGURATIONS CONNECTORS AND CLEARANCES BRACING OR GUYING AS REQUIRED SERVICE SEE FIG 4 MAST METER s ALTERNATE LOCATION FOR SERVICE EQUIPMENT POR CLEARANCES T C METER D i SOCKET 6 MAX 4
55. IPMENT Introduction Guidelines for Motor Sizes The proper operation of motors and other electrical equipment is necessary to Minimize objectionable motor starting effects e Protect the service integrity to other customers motors require starting currents substantially greater than their normal running currents Normal starting currents can be five to six times greater than the running current Excessive starting currents will result in objectionable drops in the supply voltage to customers in the vicinity Per the MidAmerican Energy Electric Tariff No 1 filed with the Iowa Utilities Board customer facilities must be maintained and operated so they do not adversely affect service to other customers Therefore the customer s equipment must normally conform to the following requirements Any exceptions thereto will be subject to a distribution engineering review and documented in a written agreement between MidAmerican Energy and the customer For all motor installations greater than five horsepower customers are required to fill out the motor data form located at www midamericanenergy com under the For Contractors tab Contact your local distribution engineering representative with the completed form It is imperative an engineering system study be completed prior to any motor purchases Starting current limitations on the electric distribution system may force the Company to make upgrades at the customer s expense in
56. LIST OF DIAGRAMS Page MINIMUM CLEARANCES FOR SERVICES 480 V AND BELOW cette eee 39 SERVICE CONDUCTOR CLEARANCES OVER ROOFS 41 TYPICAL SERVICE ATTACHMENT PROVISIONS ren 42 TYPICAL OVERHEAD SERVICE MAST REQUIREMENTS 43 CLEARANCE REQUIREMENTS AROUND GRAIN BINS eene em ene enne 44 CLEARANCE FOR CONDUCTORS INSTALLED OVER OR NEAR SWIMMING AREAS 45 GROUNDING REQUIREMENTS tat ete T D o e cased e t oi do de p iod 47 ALLOWABLE SERVICE CONDUCTOR SIZES 48 UNDERGROUND CONDUIT 49 UNDERGROUND CONDUIT INSTALLATION RISERS 50 TYPICAL OVERHEAD TEMPORARY 53 TYPICAL UNDERGROUND TEMPORARY 55 TYPICAL OVERHEAD RESIDENTIAL SERVICE nennen nenne 56 TYPICAL UNDERGROUND RESIDENTIAL 5 57 TYPICAL UNDERGROUND RESIDENTIAL SERVICE METER PEDESTAL 59 TYPICAL RURAL SERVICE METER POLE iege 61 DISCONTINUED STANDBY GENERATOR PROVISIONS 62 METERING SEQUENCE REQUIREMENTS NON RESIDENTIAL INSTALLATIONS 63 TYPICAL OVERHEAD COMMERCIAL INDUSTRIAL SERVICE WITH SELF CONTAINED METER redet e etm etm e ite e eit 64 TYPICAL UNDERGROUND COMMERCIAL INDUSTRIAL SERVICE WITH SELF CONTAINED METER 2 rettet eite mrt mtt Eodem t teg 65 TYPICAL COMMERCIAL INDUSTRIAL SE
57. Max 3 Phase 120 208 V 4 Wire 400 A Max 76 Self Contained Meter Figure 31 Item 10 Changed sentence 10 to read Commercial in Socket Wiring 3 Phase stallations require a manual clamping jaw lever 277 480 V 4 Wire 400 A bypass or Less 78 Self Contained Meter Figure 32 Notes Item 9 Changed sentence 9 to read Commercial in Socket Wiring 3 Phase 120 240V 4 Wire 400 A 3 Phase 120 208 V 4 Wire 400 A 3 Phase 277 480 V 4 Wire 400 A Max stallations require a manual clamping jaw bypass Effective April 1 2015 122 APPENDIX J AMENDMENTS Effective April 1 2015 2014 MANUAL SECTION ITEM REVISION PAGE 83 Instrument Transformer Figure 35 Transformer Moved the 1 conduit to meter and test switch to Wiring 3 Phase 120 240 V 4 Wire Delta 3 Phase 120 208 4 Wire Wye 3 Phase 277 480 V 4 Wire Greater Than 400 A Enclosure Graphic the right side of the PT cabinet former Enclosures 86 Requirements for Meter 8 Installation East last Changed sentence last bullet point to read Mounting Equipment bullet point Commercial installations require a manual clamping jaw lever bypass 99 Hinged Instrument Trans Current Potential Trans Relocated meter socket to the right side of the former Enclosure Bonding PT cabinet and added 3 minimum separation be graphics tween the cabinets Added note PT cabinet and meter socket may be
58. MidAmerican ENERGY OBSESSIVELY RELENTLESSLY AT YOUR SERVICE lt ELECTRIC SERVICE MANUAL 2014 Effective April 1 2015 ELECTRIC SERVICE MANUAL INTRODUCTION edet RO nete l eee O b LM Rush tea Oda 1 1 0 AVAILABILITY AND CHARACTERISTICS OF SERVICE 9 2 0 DIVERSION OF SERVICE OR TAMPERING 2 2 20 00002 0 0000 0000 11 3 0 PROTECTION OF CUSTOMER EQUIPMENT 12 4 0 MOTORS AND SPECIAL EQUIPMENT 14 5 0 SERVICE INFORMATION c dede tette i nA ni io tede de tibt ere dias 17 6 0 SERVICE AND SERVICE ENTRANCES General 19 61 OVERHEAD SERVICE pereon teinte sete i e Pet e enti ee ede Pee a ui vue 22 6 2 UNDERGROUND SERVICE etre i eR Pet de io 23 6 3 UNDERGROUND CONDUIT 22 RE de eti ee tid 25 6 4 OVERHEAD PRIMARY METERING Over 600 8 21 6 5 UNDERGROUND PRIMARY METERING Over 600 volts 28 7 0 CONDUCTOR IDENTIFICATION Ree oni SA O O R O EA re 30 8 0 SERVICE CONDUCTOR SIZES AND CONNECTIONS 31 9 0 METBRING EQUIPMENT zee do Rem A AD quee terque eue 32 10 0 STANDBY GENERATOR SERVICE necnon WO eq P e i DU e Pe eire 35 11 0 PARALLEL GENERATION OPERATION terti O a pe ge P oi Hee 36 Effective April 1 2015 Figure 10 11 12 13 14 20 21
59. NCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A 100 C 4 CURRENT TRANSFORMER ENCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A 101 C 5 CURRENT TRANSFORMER ENCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A 102 C 6 CURRENT TRANSFORMER ENCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A 103 D SPECIFICATIONS FOR METER TEST 5 5 104 E OPTIONAL COMBINATION CT METERING eerte eene rennen 105 F METER PEDESTAL INSTALLATION FOR INSTRUMENT TRANSFORMER METERING 106 G SPECIFICATIONS FOR INSTALLATION OF UNDERGROUND RESIDENTIAL SERVICES BY CUSTOMERS OR CONTRACTORS 107 H ELECTRIC 110 ELECTRIC SPACE HEATING DEVICE 5 111 J REVISION LISTINGS cada a nere ni i a E E E WZ W 112 Effective April 1 2015 ELECTRIC SERVICE MANUAL INTRODUCTION Purpose Code Compliance Company Liability Drawings The purpose of this manual is to supply essential information to anyone concerned with the electrical installations of MidAmerican Energy Company Company customers such as Customers Customers representatives Employees Architects Engineers Contractors It is the Company s objective to cooperate with and assist customers to obtain safe efficient electric service Nothing contained in this manual shall be
60. NDUCTORS N SEE FIG 3 FOR i APPROVED ATTACHMENT PROVISIONS Ff sERVICE ENTRANCE CONDUCTORS TO CONNECTORS EXTEND 36 BEYOND WEATHERHEAD lt SERVICE SEE_FIG 2 FOR OTHER ATTACHMENT METER IGURATIONS CLEARANCES SEE FIG 1 a gt HEN FOR CLEARANCES EH 1 u FR METER e SGCKET 6 MAX 4 MIN NX zi SERVICE EQUIPMENT GROUNDING ELECTRODE CONDUCTOR TO SERVICE PANEL GROUNDING ELECTRODE RSA CONDUCTOR BONDED e METALLIC WATER PIPING SEE FIG 6 FOR GROUNDING Sou SYSTEM REQUIREMENTS COPPER BONDING CON i E A 2 MN METER ATTACHED WITH SUITABLE CLAMPS SERVICE CHARACTERISTICS VOLTAGE SIZE METER WIRING 1 PHASE 120 V 2 WIRE 60 A MAX FIG 27 1 PHASE 120 240 V 3 WIRE 400 A MAX FIG 27 or FIG 28 Note Contact your Company representative for service availability The Company will provide and install marked items The customer is responsible for all other items Effective April 1 2015 64 FIGURE 19 TYPICAL UNDERGROUND COMMERCIAL INDUSTRIAL SERVICE WITH SELF CONTAINED METER SERVICE LATERAL CONDUIT MUST METER SOCKET BE SECURELY ATTACHED TO METER SOCKET USING EITHER TWO LOCK METER NUTS AND AN INSULATED BUSHING OR A THREADED HUB a ALTERNATE LOCATION F
61. NG Y ELECTRODE d GQ DRE SERVICE H T PANEL I NOT ALTERNATE UNDERGROUND BE PLACED INSIDE SERVICE THE SERVICE AND CONDUIT WHERE CONDUIT FURNISHED INSTALLED SEE FIG 6 FOR AND MAINTAINED BY 4 GROUND THE CUSTOMER REQUIREMENTS SERVICE CHARACTERISTICS INSTRUMENT TRANSFORMER INSTRUMENT QUANTITY TRANSFORMER VOLTAGE SIZE See Note 7 CT s PT s WIRING ane fos 3 PHASE 277 480 V 4 WIRE OVER 400 A 4000 A FIG 35 N A NOT AVAILABLE Refer To Fig 35 Note 8 Contact your Company representative for availability Effective April 1 2015 69 FIGURE 22 TYPICAL GROUP METERING SIX OR LESS METERS FACTORY FABRICATED BREAKER OR FUSE PANEL PERMANENTLY IDENTIFIED iee APT 3 2 1 2 10 MIN MIN 3 Ly 7 MIN fee P MERERI PUN ARES WALL 6 MAX pat 3 IN METER APT 2 SOCKET APT 4 251227 MIN v O FLOOR DISCONNECT AND OVERCURRENT e he PROTECTION IS REQUIRED ON Nang ries EACH METERED CIRCUIT 1 service entrance equipment shall be UL listed 2 All meter sockets shall meet Company specifications see Appendix A Working space in front of service entrance equipment and meter sockets shall be in accordance with NEC Section 110 26 Refer to page 21 for Meter Clearances 4 Apartments rooms or suites shall have identi
62. OR J lt a gl 11 SERVICE EQUIPMENT E GALVANIZED RIGID CONDUIT SECURELY FASTENED TO WALL RIGID NON METALLIC CONDUIT NIN MAY BE USED AS PERMITTED BY m NEC SECTION 300 5 D OR AS APPROVED BY GOVERNING AUTHORITY TESI Ju TO SERVICE EQUIPMENT x THE GROUNDING ELECTRODE CONDUCTOR TO THE SERVICE SEE NEC PANEL IS NOT TO BE PLACED TABLE 300 5 INSIDE SERVICE ENTRANCE CONDUIT Ge SS SERVICE LATERAL B i Se METALL TC WATER SEE FIG 6 FOR GROUNDING pes REQUIREMENTS RUDI wA TER 2 MIN METER ATTACHED WITH SUITABLE CLAMPS 1 The Company will provide and install all marked items The customer is responsible for all other items 2 The conductor and conduit when required shall be furnished installed and maintained by the customer The Company will connect the service lateral conductors to the Company facilities SERVICE CHARACTERISTICS VOLTAGE SIZE METER WIRING 1 PHASE 120 240 V 3 WIRE 200 A FIG 27 1 PHASE 120 240 V 3 WIRE 400 FIG 28 Note Contact your Company representative for service availability Other service voltages may be available Contact your Company representative Effective April 1 2015 65 FIGURE 20 TYPICAL COMMERCIAL INDUS
63. OUND RESIDENTIAL SERVICES BY CUSTOMERS OR CONTRACTORS 5 0 CABLE INSTALLATION 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 Cable shall be 600 Volt triplex rated 90 with aluminum conductors and cross linked polyethylene XLPE insulation The following table provides minimum conductor size by entrance rating Only those sizes shown in the table will be accepted by the Company PHASE NEUTRAL ENTRANCE SIZE CONDUCTORS CONDUCTOR 100 A or less 2 or 1 0 If the underground service will be excessively long service cable larger than specified in Paragraph 5 1 may be required to meet voltage drop or voltage flicker limitations A Company representative will determine the proper service cable size when the customer calls for an entrance locate and permission to install the service as described in Paragraph 2 1 The neutral conductor shall be clearly distinguishable from the phase conductors Cable ends shall be sealed against excessive moisture ingress with tape or protective caps Care must be taken to prevent damaging cable insulation or excessively bending the cable during installation Ten feet of cable shall be left outside Company owned transformers pedestals or handholes Forty feet of cable shall be left at the base of a riser pole The Company will insert cable into the enclosure or install the riser on the pole The customer or contractor shall leave a small amount of slack cable at the bottom end of the service
64. R EACH METERED CIRCUIT AII service entrance equipment shall be UL listed AII meter sockets shall meet Company specifications see Appendix A Working space in front of service entrance equipment and meter sockets shall be in accordance with NEC Section 110 26 Refer to page 21 for Meter Clearances 4 Apartments rooms or suites shall have identical markings on the entry door meter socket and fuse or breaker panel A permanent weatherproof label shall be used Spring clip type add on 5th terminals are not allowed Commercial does not include residential apartments installations require a manual clamping jaw lever bypass 7 Metered and un metered conductors shall not be installed in the same conduit or trough 8 Open meter sockets shall have a plastic protective cover and shall be sealed 9 Group metering banks shall meet 3 minimum and 6 maximum height requirements 3 PHASE 120 240 V 4 WIRE 400 A FIG 30 or 32 3 PHASE 120 208 V 4 WIRE 400 A FIG 30 or 32 Note Contact your Company representative for service availability Other service voltages may be available Contact your Company representative Effective April 1 2015 71 FIGURE 26 SELF CONTAINED METER SOCKET WIRING 1 PHASE 120 V 2 WIRE 60 A MAX 1 PHASE 120 240 V 3 WIRE 100 A 200 A OVERHEAD SERVICE
65. RE THAN 4 I AND MASTS MORE ACCESSIBLE TO PEDESTRIANS 11 FT ENO 2007 EO 0D THIS VERTICAL DIMENSION APPLIES TO ANY POINT ON THE ROOF SURFACE DIRECTLY UNDER THE CONDUCTORS Effective April 1 2015 41 FIGURE 2 TYPICAL SERVICE ATTACHMENT PROVISIONS WIREHOLDER BRACKET SERVICE RISER MAST REFER TO FIG 4 FOR CONDUIT SIZE REQUIREMENTS BRICK VENEER STUCCO PLASTER SHEET METAL WALLS OR ANY FRAME BUILDING SOLID MASONRY BRICK OR CEMENT EYE BOLTS MAY BE INSTALLED THROUGH THE MORTAR JOINT CONCRETE BLOCK OR HOLLOW TILE EYE BOLTS MAY BE INSTALLED THROUGH THE MORTAR JOINT 1 The customer shall be responsible for all service attachment provisions 2 Eye bolts where required shall be galvanized 1 2 inch minimum diameter and installed by the customer Screw point or lag type attachments 4 inches of thread are only permitted on rewires with Company approval 3 Other types of service attachments may be required for larger services 4 Service drop conductors shall not be attached to fire walls parapet walls or chimneys Effective April 1 2015 42 FIGURE 3 TYPICAL OVERHEAD SERVICE MAST REQUIREMENTS MAXIMUM SERVICE DROP LENGTHS ENTRANCE RISER MAST SERVICE ATTACHMENT HEIGHT SIZE CONDUIT SIZE FOR ABOVE SUPPORT Ft ABOVE THE I Rigid or Intermediate MAXIMUM SERVICE DROP LENGTH Ft 100A 2 125 100 75 75 50 2 1 2 or 3 150 150 100 100 75 3 1 2 or 4 150 150 150 125 100 200A 2 10
66. RS 75 500 kVA 1 3 o 74 8 DIA CORNER PIERS 4 PLACES ALTERNATIVE 40 3 DESIGN MUST BE APPROVED BY COMPANY 6x6 6 6 PAD I REINFORCEMENT 2 LAYERS 4 RE RODS TOP amp BOTTOM 6 10 LONG 4 PLACES 20 PLAN VIEW BENT TIE RE RODS 3 0 4 PLACES 66 GROUND ROD SLEEVE 1 1 2 CHAMFER BEVEL gt OO ON TOP EDGE A As 000 ae A PRIMAR SECONDAR 4 1 METERING CONDUIT MAY 1 4 11 16 16 L BE REQUIRED Be PRIMARY CONDUITS SHALL BE CENTERED ALONG BACK EDGE OF BOX OUT ALL CONDUITS SHALL EXTEND 1 MAX ABOVE TOP OF PAD SECONDARY CONDUITS SHALL BE POSITIONED STARTING AT THE BACK EDGE OF THE BOX OUT AND FILLING TOWARDS THE FRONT ALL 1 CONCRETE OVER BACKFILL CONDUITS SHALL EXTEND 1 MAX ABOVE TOP OR 8 OF PEA GRAVEL 6x6 6 6 WWF PAD REINFORCEMENT 2 LAYERS 3 4 X 9 SLEEVE PLASTIC OR GALV 20 ma STEEL d 1 2 x10 GROUND 3 SCREENED ROD BY COMPANY 999 RIVER ROCK 2 4 DIA p o ELBOWS 48 K o n RADIUS SECTION A A 1 1 2 CHAMFER BEVEL TOP EDGH 4 TIE RE RODS BENT 4 RE RODS SEE PLAN VIEW 4 PLACES POLYETHYLENE FILM DESIGN DATA CONCRETE f c gt 3500 PSI AT 28 DAYS REINFORCING STEEL ASTM A 615 40 6x6 6 6 WELDED WIRE FABRIC WWF
67. RVICE ENTRANCE METERING WITH OVERHEAD MOUNTED INSTRUMENT TRANSFORMERS FOR MAINTENANCE ONEY edite niziny nh al e er dee R S GO 67 Effective April 1 2015 Figure 22 23 24 25 26 27 28 29 30 32 33 34 35 LIST OF DIAGRAMS TYPICAL COMMERCIAL INDUSTRIAL SERVICE ENTRANCE METERING WITH CABINET MOUNTED INSTRUMENT TRANSFORMERS PREFERRED INSTALLATION a e ehe e e a DISCONTINUED TYPICAL GROUP METERING FOR SIX OR LESS METERS FACTORY FABRICATED iet e er eet tee biete sat eter en terree ttes obs DISCONTINUED TYPICAL GROUP METERING FOR MORE THAN SIX METERS OR ANY METERS IN NETWORK AREAS FACTORY SELF CONTAINED METER SOCKET WIRING FOR 1 PHASE 120 V 2 WIRE 60 A MAX AND 1 PHASE 120 240 V 3 WIRE 100 A 200 A SELF CONTAINED METER SOCKET WIRING FOR 1 PHASE 120 240 V 3 WIRE 320 A SOCKET 400 A ENTRANCE SELF CONTAINED METER SOCKET WIRING FOR 1 PHASE 120 208 V 3 WIRE 200 A rtp bias ea OH Rd SELF CONTAINED METER SOCKET WIRING FOR 3 PHASE 120 240 V AND 120 208 V 4 WIRE 400 A emere nennen SELF CONTAINED METER SOCKET WIRING FOR 3 PHASE 277 480 V Z WIRE 400A 7 tenet eee en tc bm aaa md Dis SELF CONTAINED METER SOCKET WIRING FOR 3 PHASE 120 208 120 240 277 480 V 4 WIRE 320A SOCKET 400A ENTRANCE IN
68. STRUMENT TRANSFORMER METERING GREATER THAN 400 INSTRUMENT TRANSFORMER WIRING FOR 1 PHASE 120 240 V S WIRE GREATER THAN 400 A ege aS estiment teg INSTRUMENT TRANSFORMER WIRING FOR 3 PHASE 120 240 V 4 WIRE DELTA 3 PHASE 120 208 4 WIRE WYE 3 PHASE 277 480 V 4 WIRE GREATER THAN 400 Effective April 1 2015 Page LIST OF APPENDICES Appendix Page A REQUIREMENTS FOR METER MOUNTING 86 B 1 LOCATION OF CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS ALL SIZES naa 88 B 2 SPILL PREVENTION CONTROL AND COUNTERMEASURE SPCC AND OIL CONTAINMENT CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS ALL 51 85 89 B 3 CONCRETE PAD SPECIFICATION FOR 3 PHASE PAD MOUNTED TRANSFORMERS e AREE O ie she ces Pee vet p ese 90 4 CONSTRUCTION DETAILS FOR CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS 75 500 eese en een eere 94 B 5 CONSTRUCTION DETAILS FOR CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS 750 1000 95 B 6 CONSTRUCTION DETAILS FOR CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS 1500 2500 96 C 1 INSTRUMENT TRANSFORMER ENCLOSURES 2 98 C 2 INSTRUMENT TRANSFORMER ENCLOSURES eset ren een enn ret erem 99 CURRENT TRANSFORMER E
69. T POTENTIAL TRANSFORMER ENCLOSURE BONDING IOP VIEW C 1 SIDE CT FOR ENTRANCE RATING DIMENSIONS t INCHES A 1200 OR LESS 13 6 5 16 14 172 8 172 amp 1600 A THRU 4000 A 10 1 4 TYPICAL CT DIMENSIONS ALTERNATE LOCATION FOR METER SOCKET ME TER SOCKET 1 CONDUIT 3 MINIMUM SEPARAT ON BETWEEN CABINETS PREFERRED BOND ENCLOSURE TO STEEL CONDUIT THRU LOCKNUT ALTERNATE IN THE EVENT PVC CONDUIT IS APPROVED BY LOCAL JURISDICTION ONE NEUTRAL CONDUCTOR MAY BE USED TO BOND ENCLOSURE EQUIPMENT APPENDIX C 2 CURRENT TRANSFORMER ENCLOSURE SIZE REQUIREMENTS GREATER THAN 400 A 2 NEUTRAL CT BAR WITH TERMINAL CONNECTOR MINIMUM ENCLOSURE SIZE REQUIREMENTS DIMENSIONS L W NUMBER OF WIRES PER TERMINAL CONNECTION 4 poja a A x ao 1 The above W dimensions are for three CT installations Subtract 8 to obtain the W dimensions for two CT installations 2 3 5 2 Dimensions followed by a may be reduced as follows if aluminum wire is used L by 2 and reduce W by 9 other dimensions apply when aluminum or copper wire is used 3 Refer to Appendix C 1 for general information 4 Two or three CT versions of this arrangement may be installed horizontally as shown vertically or opposite hand Rotate the page around until the diagram fits the
70. TRIAL SERVICE ENTRANCE METERING WITH OVERHEAD MOUNTED INSTRUMENT TRANSFORMERS FOR MAINTENANCE ONLY 1 The Company will provide and install all marked items The customer shall be responsible for all other items 2 Current transformers and potential transformers are furnished by the Company and installed by the customer 3 Submit current transformer and potential transformer mounting details to the Company for approval 4 Mount current transformers and potential transformers so that the polarity marks of each set are arranged in identical position 5 Instrument transformer wiring on Figures 34 and 35 shows indoor mounting bar type current transformers Wiring for outdoor installations is similar except that window type current transformers are used 6 Bond all metal racks to the neutral wire 7 Working space from electrical equipment shall be in accordance with NEC Section 110 26 8 Service entrance conduit shall be mounted on an exterior wall accessible to Company personnel Effective April 1 2015 66 FIGURE 21 NOTES TYPICAL COMMERCIAL INDUSTRIAL SERVICE ENTRANCE METERING WITH OVERHEAD MOUNTED INSTRUMENT TRANSFORMERS FOR MAINTENANCE ONLY SERVICE DEADEND CLAMP SERVICE DROP CONDUCTORS
71. TY SHIELD BARRIERS Shall be track resistant 5 CONNECTORS Shall have high strength tops Single hex screw and floating pressure pad shall be tin plated suitable for copper or aluminum wire shall have a built in anti turn provision Shall meet UL requirements for electrical connectors Only one conductor per lay in connector is allowed 6 JAWS Shall be tin plated electrolytic copper Jaws rated at 100 A and above shall be spring reinforced Spring clip type add on 5th terminals are not allowed 7 COVERS Shall be one piece Shall be lockable using a hasp type lock Shall be ringless type 8 INSTALLATION EASE Door shall be removable for installation ease Terminals shall accept copper or aluminum wire for installation flexibility Enclosure shall have a broad range of concentric knock outs to accommodate varied wiring needs Residential meter sockets rated greater than 200 amps require a manual clamping Jaw bypass Commercial installations require a manual clamping Jaw lever bypass NOTE METER MOUNTING EQUIPMENT IS NOT ACCEPTABLE IF e Designed for flush mounting only e Equipped with automatic bypass or sliding bar bypass Equipped with ring type mounting cover Used for UG application when specifically manufactured only for overhead application Not UL approved Effective April 1 2015 86 APPENDIX A THIS PAGE WAS INTENTIALLY LEFT BLANK Effective April 1 2015
72. amped earth or sand e No more than 270 in a pull The customer may choose to install the service entrance at a location on the building that eliminates the necessity for MEC cables to be in conduit The location must meet the requirements of Section 6 0 of this manual Reference Appendix G for other installation instructions Where the customer owns and maintains the service the requirements to install the conduit may be waived by the Company Effective April 1 2015 26 6 4 OVERHEAD PRIMARY METERING Over 600 volts Company The Company will provide and install the following Responsibility Primary service drop conductors Primary meter pole Meter socket Instrument transformers Meter grounding Meter Meter wiring Location and design of the metering shall be referred to appropriate Company technical personnel See local distribution engineering for pole location The primary meter pole will be located at the property line The design of the customer s primary system should be submitted to the Company representative for approval by appropriate technical personnel Customer The customer will have the following responsibilities Responsibility For Untrans e Install and maintain overhead conductors beyond the primary meter Formed Service Voltages pole Maintain proper clearances in accordance with the NESC Own install and maintain a group operated visible break disconnecting means and over current prot
73. art Equipment should be protected under all conditions including Overload Loss of voltage High or low voltage Loss of phase s e g single phasing on polyphase motors Re establishment of service after any of the foregoing Phase reversal Motors that cannot be subjected to full voltage on starting Harmonics or wave form irregularities Failure to provide such protection may result in needless damage to equipment and the expense of delay and repair Continued on next page Effective April 1 2015 12 3 0 PROTECTION OF CUSTOMER EQUIPMENT Continued Micropro Sensitive electronics such as microprocessor based home electronics cessor Based business computers are susceptible to damage due to voltage Electronics spikes or surges Before any microprocessor based electronics are installed Wiring practices that meet manufacturer specifications need to be assured For example proper grounding and dedicated circuits are important Consideration should be given to installing transient voltage surge suppression at the e Main service entrance and e Point of use An uninterruptible power supply battery backup should be considered if a momentary voltage dip or outage would cause loss of data Additional If you have any questions concerning minimum protective requirements Information contact the equipment supplier or your Company representative Effective April 1 2015 13 4 0 MOTORS AND SPECIAL EQU
74. ary contact local distribution Engineering for requirements 6 3 Underground Conduit Single phase Customers Removed second bullet point Primary and sec ondary cables for townhouses condominiums and mobile home parks Where area for trenching is limited by any of the following and subsequent related bullet points below it 6 3 Underground Conduit Conduit Requirements Added Typical to Item Typical Conduit Re AII Customers quirements Customers 6 3 Underground Conduit Conduit Requirements Conduit Sizes are now single phase primary 2 AII Customers inch three phase primary 4 0 or smaller 4 inch three phase primary 500 kcmil or larger 6 inch single phase secondary 1 0 4 0 and 350 4 inch single phase services 1 0 4 0 2 5 inch single phase services 350 kcmil 3 inch 6 3 Underground Conduit Conduit Requirements Number of conduits now One for residential All Customers local distribution engineering s discretion for commercial industrial 6 3 Underground Conduit Conduit Requirements Added note Local engineering must be con Customers tacted before installation 6 3 Underground Conduit Sweep Requirements All Material Added sentence Sweeps must be Customers burn proof exceeding burn resistant rating and steel sweeps must include ground lugs and must be bonded where exposed per NEC 6 3 Underground Conduit Installation Requirements Third bullet point now
75. assume responsibility for owning and maintaining these services only if the requirements listed below are satisfied These specifications supplement requirements contained in this manual A copy of this booklet is available from a Company representative 2 0 ENTRANCE LOCATE 2 1 Prior to installing a customer s underground residential service the customer or their contractor must contact the Company to obtain permission to install the service to reach agreement on the service entrance location and to verify the service conductor size that will be required Sources for underground services are determined when the distribution system is designed for a development Location of the source for the underground service dictates the location of the meter socket and service entrance equipment Service length determines the required conductor size Please refer to Section 5 2 of this specification 3 0 TRENCH 3 1 3 2 3 3 3 4 3 5 3 6 Customers and contractors must call the underground locate numbers as presented on Page 54 at least 48 hours prior to digging so utilities can mark the locations of their facilities Any damage to Company facilities that have been properly located will be repaired at customer or contractor expense Cable shall have at least 30 to 36 inches of cover below final grade The trench shall extend from the meter socket to a point within five feet of the nearest side lot line From this point the trench shal
76. cal markings on the entry door meter socket and fuse or breaker panel A permanent weatherproof label shall be used 5 Group metering installed in network areas as defined in Figure 18 shall be of type shown in Figures 25 and 26 Metered and un metered conductors shall not be installed in the same conduit or trough Spring clip type add on 5th terminals are not allowed Commercial does not include residential apartments installations require a manual clamping jaw lever bypass 9 Open meter sockets shall have a plastic protective cover and shall be sealed SERVICE CHARACTERISTICS VOLTAGE SIZE METER WIRING 1 PHASE 120 240 V 3 WIRE 400 A MAX FIG 27 or 28 1 PHASE 120 208 V 3 WIRE See Note FIG 29 3 PHASE 120 240 V 4 WIRE 400 A MAX FIG 30 or 32 3 PHASE 120 208 V 4 WIRE 400 A MAX FIG 30 or 32 Note Contact your Company representative for service availability Other service voltages may be available Contact your Company representative Effective April 1 2015 70 FIGURE 24 TYPICAL GROUP METERING FOR MORE THAN SIX METERS OR ANY METERS IN NETWORK AREAS FACTORY FABRICATED BREAKER OR FUSE PANEL 10 PERMANENTLY IDENTIFIED 2 1 2 5 SERVICE IN AI MIN ENTRANCE MIN CONDUIT DISCONNECT AND 6 MAX OVERCURRENT DEVICE v APT 4 d 3 MIN METER SOCKETS lt gt FOR GROUND ING TL DISCONNECT AND OVERCURRENT Y Ed Ju PROTECTION ARE REQUIRED ON TO FLOO
77. construed to relieve or lessen the responsibility of the customer or the customer s representative from complying with all applicable codes rules and regulations Consistent with the Company s tariff no inspection by the Company nor failure to object to the customer s installation shall render the Company liable for injury or damage resulting from any defective installation by the customer The drawings and written portion of this manual supplement each other Materials and workmanship specified or implied by one and not the other shall be supplied and installed in accordance with the more stringent of the requirements The drawings are general in nature and are not intended to be design specifications CUSTOMERS TO CALL 48 HOURS BEFORE DIGGING TO LOCATE UNDERGROUND FACILITIES In Illinois call 800 892 0123 In Iowa call 800 292 8989 In South Dakota call 800 781 7474 In Nebraska call 800 331 5666 Continued on next page Effective April 1 2015 1 INTRODUCTION Continued Safety Codes and Regulations The information in this manual is based on management approved interpretations of the intended safe and practical applications of the following e National Electrical Code NEC e Regulations of the governing state s utilities commission board e MidAmerican Energy Company tariff Local governing authorities may impose more stringent requirements than shown in this manual The governing state s electrical safety
78. crete by mechanical vibrating equipment so that concrete is thoroughly worked around reinforcement and other embedded items b Use equipment and procedures for consolidations of concrete in accordance with ACI recommended practices c Excessive or over vibration will not be permitted Maintain reinforcing in proper position during concrete placement operation Bring slab surfaces to correct level with straight edge and strike off Use bull floats darbies or hand floats to smooth surface free of humps or hollows The finished slab shall be level 6 0 FINAL INSPECTION 6 1 Finish Work 6 1 1 Apply non slip broom finish to exposed concrete 6 1 2 Seal concrete with a standard concrete sealer Apply sealing compound to concrete as soon as final finishing operations are complete within two 2 hours Apply uniformly in continuous operation by power spray or roller in accordance with manufacturer s directions 6 1 3 Let concrete cure for 24 hours before removing forms without putting undo pressure on concrete that may cause chipping or cracking 6 1 4 Backfill and tamp around pad where applicable 6 1 5 edges are to be finished with an edger 6 1 6 Contact the appropriate Company office for an inspection after the framework is placed Two business days notice shall be given to the Company for this inspection Effective April 1 2015 93 APPENDIX B 3 CONSTRUCTION DETAILS CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORME
79. ctive April 1 2015 112 APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL 2014 MANUAL SECTION ITEM REVISION PAGE 15 4 0 Motors and Special Special Equipment Added sentence to first paragraph The customer Equipment is responsible for any cost associated with allevi ating adverse effects caused by the installation of special equipment 17 5 0 Service Information Company Contact Changed first sentence to To avoid unnecessary expenses or delays the customer is required to contact a Company representative before con struction or remodeling begins 17 5 0 Service Information Customer Responsibility Added residential service requirements For residential services the customer must submit the following to a Company representative 20 6 0 Service and Service Equipment Specifications Added sentence to fourth paragraph A mini Entrances General mum 200 amp meter socket is required for ser vices smaller than 200 amps 21 6 0 Service and Service Meter Location Added bullet point provided with adequate Entrances General traffic protection if deemed necessary by the Company 21 6 0 Service and Service Location Last bullet point changed wording in compli Entrances General ance with Figure 1 21 6 0 Service and Service Meter Location Changed bullet point wording for grammar con Entrances General sistency 21 6 0 Service and Service Multiple Meters A
80. dded page numbers for Figure 24 and 26 Entrances General 22 6 1 Overhead Service Customer Installed Ser Removed section vices 22 6 1 Overhead Service Requirements Second paragraph changed in a single to in to allow more than one conduit 23 6 2 Underground Service Customer Installed Resi First bullet point added Company owned dential Service Customer installed Company owned cable shall be approved by and installed in a manner satisfac tory to the Company All cable must be installed between 30 and 42 below final grade 23 6 2 Underground Service Commercial Industrial Added sentence to paragraph The Company and Other Services will terminate the cables in the transformer Effective April 1 2015 113 APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL 2014 MANUAL SECTION ITEM REVISION PAGE 6 2 Underground Service Commercial Industrial Added second paragraph Network services are and Other Services typically furnished installed owned and main tained by the Company Contact local distribu tion engineering personnel to see if network ser vice is available 6 2 Underground Service NEW Mobile Home NEW Underground services for mobile home Park Services parks will be furnished installed owned and maintained by the Customer 6 2 Underground Service Placement of Transform Removed last paragraph and replaced with ers When traffic protection is necess
81. ductor Sizes Connectors Furnished Customer Connections Effective April 1 2015 The Company will allow the use of any NEC approved service conductor as shown in Figure 7 No conductor size above 750 kcmil is allowed including compressed and compact conductors The Company will furnish and install all connectors necessary to connect service conductors to the source of power AII service conductor connections made by the customer ahead of the main disconnect or connections to instrument transformers must meet the following requirements AII lugs must be UL listed and not modified Lugs may not be stacked unless specifically UL listed for the application For other than UL listed factory assembled connections bolts must be Grade 5 or better plated steel assembled with a heavy flat washer and cupped spring washer Belleville and properly tightened Bolts must be the maximum diameter that the lug hole will accept except as restricted by the terminal hole size of the instrument transformer The instrument transformer terminal holes shall not be enlarged to accept larger bolts An effort should be made to match the lug hole to the instrument transformer hole size Lugs must be attached with the maximum number of bolts possible Two hole lugs are required on each side of bar type CT connections 31 9 0 METERING EQUIPMENT Metering The Company will supply meters for metering installations in accordance wi
82. e Manual contact your Company representative An electronic version of the 2014 Electric Service Manual is also avail able online at www midamericanenergy com under the For Contractors tab 9 1 0 Availability and Char Service Voltages Added Wye to Service Voltages and Limitations acteristics of Service chart 9 1 0 Availability and Char Service Voltages Added Contact your Company representative acteristics of Service for service availability on 10046 rated panels after Calculations are based on 8046 load level per NEC overhead transformer sizes based on combined 300 kVA 2 0 Diversion of Service or Tampering Diversion and Tampering Prohibited Added If access to Company equipment is needed the Company requires a minimum of 24 hours notice 2 0 Diversion of Service Disconnection or Tampering Introduction 4 0 Motors and Special Equipment Changed sentence to read The Company will disconnect service to the customer and remove the meters and metering equipment in the event of such diversion or tampering Third paragraph removed last sentence and corre sponding bullet points Replaced sentence with For all motor installations greater than five horsepower customers are required to fill out the motor data form located at www midamericanenergy com under the For Contractors tab Contact your local distribution engineering representative with the completed form Effe
83. e Wire Phase Overhead to URD Underground 120 240 volt Single phase 1000 120Y 208 volt Three phase 1000 3000 4 wire 120 240 volt delta Three phase 800 800 see note Higher voltage service may be available for approved loads upon application to the Company It is the customer s responsibility to contact the Company prior to design of the customer s electrical system to determine the type of service available at any specific location The customer should be aware that not all voltages are available at all locations or for all loads It is recommended that the customer contact the Company before purchasing equipment Calculations are based on 80 load level per NEC overhead transformer sizes based on a combined 300 kVA Contact your Company representative for service availability on 100 rated panels Contact your Company representative for service availability Not available from a padmounted transformer Continued on next page Effective April 1 2015 9 1 0 AVAILABILITY AND CHARACTERISTICS OF SERVICE Continued Extension extensions of service will be installed according to the Company s tariff Policies Extension cost information is available at Company business offices or online at http www midamericanenergy com rates aspx Effective April 1 2015 10 2 0 DIVERSION OF SERVICE OR TAMPERING Diversion and The following are prohibited Tampering Prohibited Tampering with Company equipment Br
84. e latest revised standard specification for concrete aggregates ASTM C 33 Use crushed limestone for all aggregates Maximum coarse aggregate size shall be not more than 1 1 2 inches 2 3 3 All mixing water shall be clean and free from deleterious amounts of acids alkaline or organic materials 2 3 4 Air entraining admixtures for concrete shall conform to the latest revised standard specifications for air entraining admixtures for concrete ASTM C260 2 3 5 Calcium chloride is not permitted 2 3 6 All other materials used in the concrete shall conform to current applicable ASTM specifications 3 0 SUBGRADE PREPARATION 3 1 Material 3 1 1 All soft and yielding material and portions of the subgrade that will not compact readily when rolled or tamped shall be removed and replaced with suitable material 3 2 Compaction 3 2 1 The subgrade shall be brought to a firm and unyielding condition 3 2 2 Soil greater than or equal to 95 Proctor density or 55 psi presumptive bearing value pbv 3 2 3 Soil should be compacted at or slightly above standard optimum moisture 3 3 Moisture Barrier 3 3 1 A minimum 6 mil polyethylene film shall be placed on top of the sand leveling bed prior to pouring the concrete 4 0 CONCRETE SPECIFICATIONS 41 General 4 1 1 All concrete shall have a minimum 28 day compressive strength of 3500 psi 4 1 2 Concrete shall be produced with a minimum cement content of 520 Ib per cubic yard and an entrained air content
85. eaking of meter seals Opening or damaging of Company locks Interference with operation of Company equipment Unauthorized work performed on meter installations or other property of the Company If access to Company equipment is needed the Company requires a minimum of 24 hours notice Disconnection The Company will disconnect service to the customer and remove the meters and metering equipment in the event of such diversion or tampering Customer The customer shall be responsible for payment of all costs which result from Cost such diversion or tampering Effective April 1 2015 11 3 0 PROTECTION OF CUSTOMER EQUIPMENT Introduction The Company will use reasonable diligence to supply continuous and sufficient electric service to its customers that meets or exceeds all regulatory requirements In some instances such as major storms where lightning high winds or similar adverse conditions occur the Company s electrical system may experience momentary outages and or voltage spikes Protection of customer is advised to provide adequate protection against the effects of Motors and outages or voltage spikes in accordance with the NEC or other pertinent Other sources of information for all types of motors and other equipment Equipment Equipment that should be protected includes but is not limited to Motors Computers Electronics equipment Equipment in which computers or electronics form an integral operating p
86. ear is ordered Wiring The customer must provide and install all wiring connected to and beyond the metal clad switchgear according to the NESC in addition to the requirements of the NEC Continued on next page Effective April 1 2015 28 6 5 UNDERGROUND PRIMARY METERING Over 600 volts Continued Transformers For any new primary metering the customer must furnish own maintain and Beyond operate all transformers located beyond the first point of attachment Primary Metering Padmount transformer installations should be in accordance with Appendix B AII indoor rooftop or specialty transformers must be furnished and maintained by the customer Company For existing primary metered customers the Company may provide standard Owned distribution transformers located beyond the first point of attachment Transformers The customer must provide primary fusing determined to be necessary by the Company to protect Company transformers The Company will provide loadbreak bushing inserts for Company owned padmount transformers Company transformers will be located in an area accessible to Company vehicles and will meet the clearance requirements of the NESC Effective April 1 2015 29 7 0 CONDUCTOR IDENTIFICATION Neutral Neutral conductor identification shall be in accordance with NEC Conductor Section 200 6 Insulated Neutral Identification No 6 or smaller An insulated grounded conductor of 6 AWG or
87. ection immediately beyond the metering pole Ensure that all wiring and equipment installed beyond the meter are in accordance with the NESC in addition to the requirements of the NEC Effective April 1 2015 27 6 5 UNDERGROUND PRIMARY METERING Over 600 volts Provided by The Company will provide and install the following Company e Primary underground conductors between the Company s distribution system and the first point of attachment in the customer supplied switchgear Meters The Company will provide instrument transformers for metering which are to be installed by the customer Provided by The customer must provide in a Company approved location Customer Company approved enclosed upright or padmount switchgear Fuses Grounding bails Metering cubicle Concrete pads Conduits Clearances The customer must maintain adequate clearances around the switchgear for operating purposes These clearance requirements will be determined by Company technical personnel and meet minimum NESC requirements Customer In the design purchase and installation of the switchgear package close Switchgear coordination is necessary between the customer switchgear manufacturer and Company personnel The customer must furnish a minimum of three copies of the switchgear drawings and site plan for Company engineering approval A letter of agreement between the Company and the customer is recommended before the switchg
88. ective April 1 2015 88 APPENDIX B 1 SPILL PREVENTION CONTROL AND COUNTERMEASURE SPCC PLANS AND OIL CONTAINMENT FOR CUSTOMER FURNISHED PADS FOR 3 PHASE PAD MOUNTED TRANSFORMERS ALL SIZES Federal regulations prohibit the discharge of oil onto or into navigable waters of the United States or adjoining shorelines A facility with aggregate above ground oil storage capacity of more than 1 320 gallons counting only containers with oil storage capacity of 55 gallons or more which could reasonably be expected to discharge oil to navigable waters of the United States must prepare a Spill Prevention Control and Countermeasure SPCC Plan More specifically whenever MidAmerican owned equipment at a customer facility exceeds this threshold customer owned oil filled equipment at the site excluded a plan must be prepared This requirement affects bulk oil containers oil filled electrical equipment and oil filled process equipment Development of a site specific SPCC Plan requires detailed knowledge of the facility and the potential effects of any oil release Each SPCC Plan must include certain standard elements to ensure compliance with federal regulations One of the elements is a description of appropriate containment and or diversionary structures or equipment designed to prevent a discharge of oil to the environment Due to potential for oil release from oil filled electrical equipment any proposed facility that includes installation of 3 pha
89. entative if any questions arise concerning this installation Spring clip type add on 5th terminals are not allowed Commercial installations require a manual clamping jaw lever bypass SO DW R Customer to provide all lugs Effective April 1 2015 73 FIGURE 28 SELF CONTAINED METER SOCKET WIRING 1 PHASE 120 208 V 3 WIRE 100 A 1 PHASE 120 208 V 3 WIRE 200 A S n TERMINAL 5th TERMINAL REQUIRED REQUIRED CLAMP NEUTRAL NEUTRAL MINIMUM No 12 INSULATED wIRE MINIMUM No 12 INSULATED WIRE 1 PHASE 120 208 V 3 WIRE 100 A 1 PHASE 120 208 V 3 WIRE 200 A WITH LEVER BYPASS The meter sockets shall meet Company specifications see Appendix A 2 Working space in front of service entrance equipment and meter sockets shall be in accordance with NEC Section 110 26 Refer to page 21 for Meter Clearances 3 When using aluminum conductors wire brush the conductors and apply oxide inhibitor on all connections When the neutral is not continuous through the meter socket a dual lug neutral connector shall be used 5 120 208 V 3 wire is normally available only from a 3 phase 120 208 V 4 wire service entrance 200 ampere service may be available in certain areas Consult your Company representative Spring clip type add on 5th terminals are not allowed 7 Commercial installations require a manual clamping jaw lever bypass Effective April 1 2015 74 FIGURE 29 SELF CONTAINED METER SOCKET WIRING 3 PHASE
90. er signal for demand Monitoring monitoring purposes the Company will install at the customer s expense a pulse initiation relay external to the meter socket or cabinets These contacts will provide the customer with a real and or reactive power pulse Effective April 1 2015 34 10 0 STANDBY GENERATOR SERVICE General Parallel Operation Transfer Switch The Company will allow a customer to have standby generators for temporary or emergency electric service For the safety of Company personnel as well as protection of the customer s equipment there must be a positive means to guarantee that the standby generator cannot accidentally be connected in parallel to the Company s system A manual or automatic transfer switch must meet the following requirements Must be installed at the customer s expense Must be designed so that under no conditions will the standby generator and the Company s electrical system operate in parallel without express written agreement between the customer and the Company For a positive break before make design see Figure 17 e Should incorporate a visual indication or some means of determining the physical position of the switch e Shall be installed in compliance with this manual and the NEC e Interlocking breakers with visible means of determining the open are acceptable e Socket mounted transfer switches are allowed Before installing a system please contact your
91. ervice Equipment Specifications Changed last sentence to read A minimum 200 Entrances General amp meter socket is required for all under ground residential services smaller than 200 amps 43 Typical Overhead Service Maximum Service Drop Changed column heading from Riser Mast Con Mast Requirements Lengths Table duit Size Rigid or Intermediate to Riser Mast Conduit Size For Above the Roofline Rigid or Intermediate 43 Typical Overhead Service Application and Condi Added sentence to 5 Reducing down to a Mast Requirements tions for Above Table smaller conduit size must adhere to local juris Item 5 dictional requirements 50 Underground Conduit In Figure b Changed Figure b to show conduits on opposite stllations at Risers sides of the pole and changed the 5 minimum to 15 Self Contained Meter Figure 27 Item 7 Changed sentence 7 to read Commercial in Socket Wiring 1 Phase stallations require a manual clamping jaw lever 120V 2 Wire 60A Max bypass 1 Phase 120 240 V 3 Wire 100 A 200A 74 Self Contained Meter Figure 28 Item 7 Changed sentence 7 to read Commercial in Socket Wiring 1 Phase stallations require a manual clamping jaw lever 120 240 V 3 Wire 320 A bypass Socket 400 A Entrance 75 Self Contained Meter Figure 30 Item 8 Changed sentence 8 to read Commercial in Socket Wiring 3 Phase stallations require a manual clamping jaw lever 120 240V 4 Wire 400 A bypass
92. for the installation and maintenance of padmounted transformers Minimal clearances are shown in Appendix B 1 for Company installation and maintenance requirements 37 0 minimum clearance is to be maintained from pad sides and back to the nearest structure A level graded 10 0 minimum clearance is to be maintained from the front of the pad to the nearest fixed structure When traffic protection is necessary contact local distribution engineering for requirements Pads for single phase transformers will be furnished and installed by the Company Three phase transformer pads must be e Installed by the customer at the customer s expense e Constructed in a manner satisfactory to the Company in a mutually agreed upon location with hard surface access and unobstructed work space for large vehicles See concrete pad specifications in Appendix B Contact the appropriate Company office for an inspection after the framework is placed A two business days notice shall be given to the Company for this inspection Sufficient cable shall be left at the base of the service riser pole to connect to the Company s overhead system The dimensional limitations and acceptable arrangements of conduit exits are shown on Figure 9 Conduit must be installed between the meter socket and main disconnect Effective April 1 2015 24 6 3 UNDERGROUND CONDUIT Polyphase AII Company owned polyphase cables primary and seconda
93. for two CT installations 31 32 10 35 32 10 39 40 10 45 51 124 49 55 12 27 28 10 31 32 10 35 36 10 41 47 12 45 51 12 2 Dimensions followed by a may be reduced as follows if aluminum wire is used Reduce L by 2 and reduce W by 8 All other dimensions apply when aluminum or copper wire is used 3 Refer to Appendix C 1 for general information 4 Two three CT versions of this arrangement may be installed horizontally as shown vertically or opposite hand Rotate the page around until the diagram fits the preferred arrangement Effective April 1 2015 103 APPENDIX C 6 SPECIFICATIONS FOR METER TEST SWITCHES Test switches are used with instrument transformer rated meter sockets and are mounted in the lower half of the enclosure The test switches and meter sockets shall be furnished installed owned and maintained by the customer Specifications for test switches are as follows Test switches shall be tin corrosion resistant Test switches shall be blade type using front connections Test switches shall be mounted vertically with the hinge side on the bottom PR ues Connections for the metering leads shall be stud type connections with nuts for stranded copper conductors en The connections shall have serrated test ears for test connections 6 The neutral shall be a switch and not a solid bar 7 The test switches shall be covered by the lockable cover of the meter socket SERVICE NUMBER OF
94. full length gate is installed it shall be hinged and no closer than 3 0 from pad front Local government fire protection and building codes may require greater clearances Customer will avoid plantings or construction that interferes with Company s required maintenance access to its equipment If a fence or barrier is to be installed it must be coordinated with the Company All conduits shall extend 5 0 beyond the pad and screening structure if used and the locations of the ends of primary conduits shall be identified Primary conduit shall be installed between 42 and 48 below final grade Secondary conduit shall be installed between 30 and 42 below final grade When metallic conduit is utilized customer shall install grounding bushings When necessary for traffic protection set a 4 diameter concrete filled galvanized steel post 37 0 from pad corner Post shall be 8 long with a 4 concrete embedment All Company transformers shall be located in mutually agreed upon location with hard surface access and unobstructed work space for large vehicles If special equipment such as a crane is required for setting or replacing the transformer the customer shall pay all expenses A trench 27 0 deep and 37 0 wide will be dug on all four sides The trench will be lined with silt fence fabric and filled with 3 screened river rock to final grate Contact local engineering representative if design needs modification Eff
95. g compact and compressed conductors TEMPERATURE RATING OF CONDUCTOR SEE TABLE 310 13 OF THE NEC SIZE 60 75 90 60 759 90 140 167 194 140 167 194 TYPES TYPES TYPES TYPES TYPES TYPES TW RHW TBS SA TW UF RHW TA TBS THHW THW SIS FEP THHW THW SIS THWN XHHW FEPB MI THWN THHN THHW USE ZW RHH RHW 2 XHHW THW 2 THWN 2 THHN THHW USE RHH RHW 2 THW 2 THWN 2 USE 2 USE 2 XHH XHH XHHW XHHW 2 ZW 2 XHHW 2 ZW 2 COPPER ALUMINUM OR COPPER CLAD ALUMI NUM For residential applications see NEC Section 310 15 B 6 Reproduced with permission from NFPA 70 2011 National Electrical Code Copyright 2010 National Fire Protection Association Quincy MA This reprinted material is not the complete and official position of the NFPA on the referenced subject which is represented only by the standard in its entirety Effective April 1 2015 48 FIGURE 7 UNDERGROUND CONDUIT INSTALLATION INES MEE STRUCTURE SURFACE AREAS DIRECT BURIED ABLE NON TRENCHABLE AREA WHERE AREA AVAILABLE FOR TRENCHING IS LIMITED SEE DIRECT SECTION 6 3 BURIED gt gt CABLE CONDUIT IS REQUIRED IF SERVICE WILL BE UNDER NON TRENCHABLE AREAS A RISER ELBOW IS TO BE CONTINUOUS WITH THE CONDUIT IF DIMENSION A IS LESS THAN 5 FEET REFER TO SECTION 6 3 CONDUIT INSTALLATION REQUIREMENTS Effective A
96. he Company e nan accessible location out of the way of traffic Meters Not Meters shall not be installed on a trailer mobile home or any building not On Permanent on a permanent foundation Buildings Typical meter installations for these applications are referenced in Figure 14 for meter pedestal and Figure 15 for meter pole Meter A clear working space of not less than Clearances e 36 inches in front of the meter e 30 inches wide must be maintained at all times or the meter will be relocated at the customer s expense NEC Section 110 26 Multiple Two or more meter sockets installed on the same building must be grouped Meters Unused meter sockets shall have a plastic protective cover and shall be sealed Before service is connected the following information where applicable must be plainly marked on each meter socket cover socket back plate and associated breaker or fuse panel with a permanent marker such as a paint stick etc Magic Markers tape pencil or label makers are not considered permanent and are not acceptable Apartment numbers Duplex numbers House meter Water heater etc Identification and marking of these meter sockets and the breaker or fuse panel for each individual unit or apartment is the responsibility of the customer See Figures 24 and 26 Effective April 1 2015 21 6 1 OVERHEAD SERVICE Company The Company will install operate and maintain all overhead facilities located Respo
97. ion 250 56 NEC Section 250 60 prohibits using a lighting rod grounding electrode as one of the electrodes listed above 4 Concrete encased electrode when used shall be encased by at least 2 inches of concrete located within and near the bottom of a concrete foundation or footing that is in direct contact with the earth consisting of at least 20 feet of one or more bare or zinc galvanized or other electrically conductive coated steel reinforcing bars or rods of not less than 1 2 inch in diameter or consisting of at least 20 feet of bare copper conductor not smaller than 4 AWG Reinforcing bars shall be permitted to be bonded together by the usual steel tie wires or other effective means 5 If a metal underground water pipe is in direct contact with the earth for 10 feet more it must be bonded to the grounding electrode system In addition a copper bonding conductor or equivalent must be connected around the water meter See the following NEC Table 250 66 reprinted with permission from NFPA 70 2002 the National Electrical Code National Fire Protection Association Quincy MA 02269 This reprinted material is not the complete and official position of the National Fire Protection Association on the referenced Subject which is represented only by the standard in its entirety 6 The service grounding electrode conductor shall be connected to the neutral bus in the service disconnect or overcurrent device TABLE 250 66 GROUNDING ELECTRODE
98. is No Osborne Illinois No Osco Illinois Port Byron Illinois No Preemption Illinois Rapids City Illinois Reynolds Illinois Rock Island Illinois Sherrard Illinois Silvis Illinois No Swedona Illinois No Taylor Ridge INC z Incorporated Effective April 1 2015 Rock Island Henry Rock Island Mercer Rock Island Mercer Rock Island Henry Rock Island Henry Rock Island Rock Island Rock Island Rock Island Henry Henry Mercer Rock Island Rock Island Rock Island Rock Island Henry Mercer Rock Island Mercer Rock Island Rock Island Henry Henry Rock Island Henry Rock Island Mercer Rock Island Rock Island Rock Island Mercer Rock Island Mercer Rock Island South Dakota South Dakota South Dakota South Dakota South Dakota South Dakota Alcester Dakota Dunes Fairview Hudson Jefferson North Sioux City Union Union Lincoln Lincoln Union Union THIS PAGE INTENTIONALLY LEFT BLANK Effective April 1 2015 8 1 0 AVAILABILITY AND CHARACTERISTICS OF SERVICE Introduction electric service supplied by the Company is 60 hertz alternating current Service One service voltage will be provided to each service location Voltages The following table lists Nominal voltages offered to the customer e Maximum size service entrance that the Company can accommodate without special consideration SERVICE VOLTAGES AND LIMITATIONS Max Service Entrance Size Type of Service Amperes Overhead Voltag
99. l extend parallel to and within five feet of the side lot line to the Company owned transformer handhole or pedestal The trench shall be dug in straight lines parallel to lot lines The trench shall not be dug on and shall not cross any lot lines Any trench route that does not conform to the requirements of Paragraph 3 3 must be approved by a Company representative prior to installation of the service Trenches may be mechanically dug no closer than 18 inches to the bases of Company owned transformers handholes or pedestals A 24 x 24 handhole immediately adjacent to the base of the enclosure must be hand dug all the way to the enclosure Any damage to Company facilities will be repaired at customer or contractor expense Locations of conduit sweeps for riser installations on poles must be approved by the Company prior to installation Please refer to Figure 9 4 0 CONDUIT INSTALLATION 4 1 Ifthe cable will be installed in contact with any rocks or other exposed obstructions by trenching the service cable must be installed in a PVC conduit to protect the cable 4 2 Where the service is to be located under a planned non trenchable surface or future obstacle such as a driveway or sidewalk the service cable must be installed in a PVC conduit of suitable size that extends past the non trenchable or obstructed area Please refer to Figure 8 and Section 6 3 Effective April 1 2015 107 APPENDIX G SPECIFICATIONS FOR INSTALLATION OF UNDERGR
100. llo Crawford Calhoun Pocahontas Marion Mahaska Calhoun Buena Vista Sac Carroll Cherokee Franklin Calhoun Woodbury Plymouth Scott Mahaska Cass Warren Carroll Scott Continued on next page INTRODUCTION continued Communities STATE INC TOWN lowa Little Sioux lowa No Littleton Logan lowa Lohrville Iowa No Loveland Iowa Lovilia lowa No Lovington No Luton lowa Luverne lowa Lytton lowa Macedonia lowa Magnolia lowa Malvern Manson lowa No Maple River Iowa Marcus Iowa Marne Iowa Martensdale Marysville lowa Maurice McClelland Iowa No McPaul Iowa Melcher Dallas Iowa Meriden Iowa Merrill lowa No Middleburg Iowa Milo Iowa Minburn Iowa Minden Iowa No Mineola Iowa Mingo Iowa Missouri Valley Iowa Mitchellville Iowa Modale Iowa Mondamin Iowa Monroe Iowa Moorhead Iowa Moorland Iowa No Morse Iowa No Mount Carmel Iowa Mount Joy Iowa Moville Iowa Nashua Iowa Nemaha Iowa New Hartford lowa New Liberty lowa New Market New Sharon lowa Newell lowa Newkirk lowa Nodaway lowa Northboro Norwalk lowa No Norwich Iowa Oakland Iowa No Oasis Iowa Odebolt Iowa Oskaloosa INC z Incorporated Effective April 1 2015 COUNTY Harrison Buchanan Harrison Calhoun Pottawattamie Monroe Polk Woodbury Kossuth Calhoun Pottawattamie Harrison Mills Calhoun Carroll Cherokee Cass Warren Marion Sioux Pottawattamie Fremont Mari
101. n Mills Mahaska Iowa University Heights Johnson Iowa No University Park Mahaska Iowa Urbandale Dallas Polk Iowa Ute Monona Iowa Vail Crawford Iowa No Valeria Jasper Iowa Van Meter Dallas Iowa Varina Pocahontas Iowa Vincent Webster Iowa No Voorhies Black Hawk Iowa Wall Lake Whsle Sac Iowa Walnut Pottawattamie Iowa No Washburn Black Hawk Iowa Washta Cherokee Iowa Waterloo Black Hawk INC z Incorporated Effective April 1 2015 Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Waukee Webster City West Des Moines Weston Westphalia Westside Whiting Wick Willey Windham Windsor Heights Wright Yetter Yorktown Continued on next page Dallas Hamilton Polk Pottawattamie Shelby Crawford Monona Warren Carroll Johnson Polk Mahaska Calhoun Page INTRODUCTION continued Communities Illinois Andalusia Illinois Andover Illinois Barstow Illinois No Boden Illinois No Buffalo Prairie Illinois No Cable Illinois Carbon Cliff Illinois Cleveland Illinois Coal Valley Illinois Colona Illinois Cordova Illinois No Coyne Center Illinois East Moline Illinois No Edgington Illinois No Green River Illinois Green Rock Illinois No Hamlet Illinois Hampton Illinois Hillsdale Illinois No Illinois City Illinois No Joslin Illinois No Lynn Center Illinois Matherville Illinois Milan Illinois No Millersburg Illinois Moline Illinois Oak Grove Illinois No Ophiem Illinois Orion Illino
102. ned and engineered for the sole and primary purpose of providing heat to a space or building Not be waste heat recovery systems that actively or passively capture byproduct heat that would otherwise be rejected into the environment e Be thermostatically controlled to cycle the heat source off when heating is not required e Beregularly used and relied upon for supplying the heating requirements to the customer s premises Be solidly and permanently connected to its electrical source i e not a plug in e Beenergized in step stages of 7 5 kW or less for heating elements of electric furnaces and heat pumps Capacity The amount of installed heating capacity shall be determined in accordance with current recognized standard practices in the industry Installed capacity shall not exceed the capacity determined by the standard practices by more than 15 percent Effective April 1 2015 111 APPENDIX I REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL REVISION SECTION ITEM 2 Introduction Safety Codes and Regula tions NE Additional Copies of the Electric Service Manual Removed dates from The National Electric Safety Code NESC is a registered trademark of the Institute of Electrical and Electronic Engi neers New York NY 10016 The NEC is a registered trademark of the National Fire Protec tion Association Inc Quincy MA 02269 Changed sentence to read For additional copies of the 2014 Electric Servic
103. nsibility between the customer s property line and the first point of attachment to the customer s building or other structure Customer The customer shall install own operate and maintain all overhead facilities Responsibility private property beyond the point of attachment except for certain metering and transformation equipment Requirements Attachment of the customer s metering equipment and distribution wiring will not be allowed on Company poles without a contractual agreement including an acceptable hold harmless provision with the Company Service entrance conductors between the weatherhead and the main disconnect must be installed in conduit and will extend 36 inches beyond the weatherhead The service drop should not cross adjoining property or livestock areas Conduit must be installed between the meter socket and main disconnect Check with your Company representative concerning service and metering applications over 600 volts Effective April 1 2015 22 6 2 UNDERGROUND SERVICE Residential Service Customer Installed Residential Service Commercial Industrial and Other Services Mobile Home Park Services Individual residential and duplex underground services will normally be installed owned and maintained by the Company The cost of the underground service is governed by the Company s tariff and state rules and regulations in effect at the time of installation Upon prior approval
104. nstallation and connects and energizes the conductors The Company will not connect or energize any service that does not meet the requirements of this specification Any changes required to meet these specifications will be performed by the customer or contractor at their expense 9 2 The Company will own and maintain the service conductors after they have been connected and energized 10 0 QUESTIONS 10 1 Questions concerning these specifications should be directed to a Company representative Effective April 1 2015 109 APPENDIX G ELECTRIC METERING INFORMATION Availability and Characteristics of Service Section 1 0 pg 9 Diversion of Service or Tampering Section 2 0 pg 11 Equipment Specifications Section 6 0 pg 20 1 Meter Sockets shall meet Company specifications See your Company representative for an approved socket list Section 6 0 pg 20 Equipment Specifications 2 Spring clip type add on 5th terminals are not allowed 3 Open meter sockets shall have a plastic protective cover and shall be sealed Section 6 0 pg 21 Multiple Meters 4 Ifthe service size is 400 amps or less self contained metering will be used New 2005 5 Before service is connected each meter socket cover socket back plate and associated breaker of fuse panel must be plainly marked with a permanent marker such as a paint stick etc Magic Markers tape pencil or label makers are not considered permanent and are not acceptable Section 6
105. of 7 by volume 4 1 3 Maximum allowable concrete slump shall be 4 inches 4 1 4 Where it can be shown that adequate strength surface finish and durability can be obtained on a consistent basis with mix designs other than those specified above such designs may be used upon written approval Effective April 1 2015 91 APPENDIX B 3 CONCRETE PAD SPECIFICATION 3 PHASE PAD MOUNTED TRANSFORMERS 5 0 EXECUTION 5 1 Forms 5 1 1 Construct forms to sizes shapes lines and dimensions shown and to obtain accurate alignment location grades level and plumb work of finished structure 5 1 2 Provide for openings sinkages chamfers and blocking in the structure 5 1 3 Fabricate forms for easy removal without hammering or prying against concrete surfaces 5 2 Placing Reinforcement 5 2 1 Clean reinforcement of loose rust mill scale earth ice and other materials which reduce or destroy bond with concrete 5 2 2 Accurately position support and secure reinforcement against displacement by formwork construction or concrete placement operations 5 2 3 Locate and support reinforcing by metal chairs runners bolsters spacers and hangers as required 5 2 4 Place reinforcement to obtain adequate concrete protection 5 3 Concrete Placement 5 3 1 Preplacement Inspections Before placing concrete the Contractor shall give the Company 2 business days notification All items to be embedded will be exposed at the time of the inspection The
106. of the meter potential leads In unusual conditions contact your Company representative CT s shall be installed so they may be removed without access to the back of the cabinet See Appendix C 1 for instrument transformer requirements Effective April 1 2015 82 FIGURE 34 INSTRUMENT TRANSFORMER WIRING 3 PHASE 120 240 V 4 WIRE DELTA 3 PHASE 120 208 V 4 WIRE WYE 3 PHASE 277 480 V 4 WIRE GREATER THAN 400 A ALTERNATE PORE SOURCE indi ENCLOSURE REQUIRES POLARITY MARKS A 3 4 EXTERIOR SEE NOTE 1 PLYWOOD BACK ING ALTERNATE LOAD SOURCE an NEUTRAL 1 CONDUIT TO rH METER AND TEST Lac e cen SWITCH SOCKET ALTERNATE UNT 35 CIRCUIT FT MAX SOURCES 00 000520202 REFER TO NOTE 9 BELOW TRANSFORMER ENCLOSURE REFER TO APPENDIX C FOR ALL INSTRUMENT TRANSFORMER ENCLOSURES 1 The CTs and PTs if required shall be mounted so that the polarity marks are arranged facing source side Insulated bushings are required on all conduits Instrument transformer enclosures shall be grounded per NEC Article 250 Covers on all instrument transformer cabinets shall be hinged on the side with heavy duty hinges Bar type CTs will be used in instrument transformer enclosures and will be provided by the Company ow dw Ee 292 RY The high phase conductor of a 120 240 V Delta installation shall be identified by orange insulation paint or tape at the weatherhead CT connections
107. on Cherokee Plymouth Sioux Warren Dallas Pottawattamie Mills Jasper Harrison Polk Harrison Harrison Jasper Monona Webster Johnson Carroll Scott Woodbury Chickasaw Sac Butler Grundy Scott Taylor Mahaska Buena Vista Sioux Adams Page Warren Page Pottawattamie Johnson Sac Mahaska STATE Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa INC TOWN No No No No No Otho Otley Oto Ottosen Oyens Pacific Junction Palmer Palmyra Panama Panorama Park Parkersburg Patterson Peoria Percival Perkins Pershing Persia Pierson Pioneer Pisgah Plainfield Pleasant Hill Pleasant Valley Pleasantville Pocahontas Whsle Polk City Pomeroy Ponderosa Port Neal Portsmouth Powersville Prairie City Princeton Prole Quimby Randolph Raymond Red Oak Red Rock Richards Ricketts Rising Sun River Sioux Riverdale Riverton Rock Valley Rockwell Rockwell City Rodney Roselle Ross Runnells Ruthven Rutland Sac City Salix Sandyville Saylorville COUNTY Webster Marion Woodbury Humboldt Plymouth Mills Pocahontas Warren Shelby Scott Butler Madison Mahaska Fremont Sioux Marion Harrison
108. orced Concrete Concrete Reinforcing Steel Institute Manual of Standard Practice 1 2 2 Concrete Testing Service The Contractor may be required to employ a testing laboratory acceptable to the Company to perform material evaluation tests and to design concrete mixes 2 0 MATERIALS 2 1 2 2 2 3 Form Materials Forms for Exposed Finish Concrete Unless otherwise indicated construct framework for concrete surfaces with construction lumber plywood metal metal framed plywood faced or other acceptable panel type materials to provide continuous straight smooth exposed surfaces Provide form material with sufficient thickness to withstand pressure of newly placed concrete without deflection Reinforcing Materials 2 2 1 Reinforcing Bars ReBar ANSI ASTM A 615 Grade 40 Deformed 2 2 2 Welded Wire Fabric WWP ANSI ASTM A 185 Welded steel wire fabric 2 2 3 Supports for Reinforcement Provide supports including bolsters chairs and spacers for positioning reinforcing bars and welded wire fabric in place Concrete Materials 2 3 1 Cement shall conform to the latest revised standard specification for Portland Cement ASTM C 150 Type 1 or standard specification for blended hydraulic cements ASTM C 595 Effective April 1 2015 90 APPENDIX B 3 CONCRETE PAD SPECIFICATION 3 PHASE PAD MOUNTED TRANSFORMERS 2 0 MATERIALS Continued 2 3 Concrete Materials Continued 2 3 2 Concrete aggregates shall conform to th
109. owa No Dewar Iowa Doon Dougherty lowa Dow City Dumont lowa Duncombe Dunkerton lowa Dunlap lowa Eagle Grove lowa Earlham Iowa Earling lowa Early lowa Eldridge Whsle lowa Elk Horn Elk Run Heights lowa Elkhart lowa Elliott Iowa Emerson Emmetsburg Iowa Essex Iowa Estherville Whsle Iowa Evansdale Iowa Exira Iowa Farnhamville Iowa Farragut Iowa No Faulkner Iowa No Fern Iowa No Fiscus Iowa No Flagler Floyd lowa Fonda Whsle lowa Fort Dodge Iowa Galva Iowa No Gaza Iowa Geneva Iowa No Germantown Iowa Gilbertville Iowa Gilmore City Iowa Glenwood Iowa Goldfield lowa Granger Iowa No Grant Center lowa No Grant City Iowa Granville lowa Gravity lowa Gray Grimes lowa Griswold lowa Halbur lowa Hamburg lowa Hamilton lowa No Hamlin Iowa Hampton Iowa Hancock INC Incorporated Effective April 1 2015 COUNTY Bremer Polk Dallas Black Hawk Lyon Cerro Gordo Crawford Butler Webster Black Hawk Harrison Black Hawk Madison Shelby Sac Scott Shelby Black Hawk Polk Montgomery Mills Palo Alto Page Emmet Black Hawk Audubon Calhoun Fremont Franklin Grundy Audubon Marion Floyd Pocahontas Webster Ida O Brien Franklin O Brien Black Hawk Humboldt Pocahontas Mills Wright Dallas Woodbury Sac Sioux Taylor Audubon Polk Cass Carroll Fremont Marion Audubon Franklin Pottawattamie STATE
110. p conductors Open wire service conductors require greater clearances A The drip loop or service attachment fixture whichever is the lowest point shall have 12 feet minimum vertical clearance above final grade Higher clearances may be required reference below B Theclearance between the service attachment and weatherhead shall be 12 inches minimum and 24 inches maximum C Service conductors that are not protected by conduit or raceway shall have a minimum clearance of 3 feet from windows designed to be opened doors porches fire escapes signs and similar construction Conductors run above the top level of a window shall be permitted to be less than the 3 feet requirement D The diagonal distance from the nearest edge of a balcony or deck handrail that is readily accessible to the service conductor shall be 10 feet minimum E Refer to Figure 2D F Minimum vertical clearances between service drop and communication conductors shall be 2 feet at the conductor crossing and 12 inches at adjacent vertically spaced attachments to the building G The minimum vertical clearance shall be 12 feet above sidewalk and ground 16 feet above residential driveways 18 feet above commercial areas public driveways alleys and streets and other land traversed by vehicles 20 feet above Department of Transportation right of way and others as required by local jurisdiction H For individual settings the clearance between the center of the
111. pril 1 2015 49 FIGURE 8 UNDERGROUND CONDUIT INSTALLATIONS AT RISERS NOTES TO APPARATUS 1 Contact the Company for approved f conduit position prior to each pole that is opposite the direction of 5 MAXIMUM traffic CONDUIT SIZE 2 Installations requiring larger conduit capacity or different conduit orientation than shown must be approved in advance by your Company representative installation Normally the riser 4 should be mounted on the side of the 3 Conduits are to be installed so that the top end is 4 6 above final grade AE 4 PVC conduit is recommended 27 Sweeps are to be rigid steel or 15 fiberglass If rigid steel is used it Sa Ba MAX TMBM must be effectively grounded CONDUIT SIZE 15 Min Between 30 DEGREE Conduits 5 Contact the Company for SWEEP BY b CUSTOMER W recommended length of conductor to be coiled at base of pole so sufficient length is available to reach apparatus gap ENEI 6 See Section 63 for conduit installation requirements Lt 7 Where conduit is to be extended to a location requiring a new or TYPICAL SIDE VIEW replacement pole such extensions shall not be made until the pole work is completed by the Company 8 Spare conduit to be capped with permanent cap Effective April 1 2015 50 FIGURE 9 THIS PAGE WAS INTENTIONALLY LEFT BLANK Effective April 1 2015 51 TYPICAL OVERHEAD TEMPORARY S
112. provided current transformers and potential transformers may be mounted by the manufacturer in a customer s factory fabricated switchgear Contact your Company representative for details Before fabrication switchgear shop drawings shall be submitted to the appropriate Company representative for review and approval of instrument transformer mounting details Refer to Section 8 0 in this manual for connection requirements when using bar type CTs No customer equipment or other wiring shall be allowed in or to pass through the instrument transformer enclosure Enclosure requires a 3 4 exterior plywood backing Instrument transformer enclosures shall be grounded per NEC Article 250 and Company requirements as shown in Appendix C 2 APPENDIX 1 HINGED INSTRUMENT TRANSFORMER ENCLOSURES CURRENT TRANSFORMER SEE DRAWING BELOW N FOR DIMENSIONS 2 MINIMUM SEE NOTE 2 APPENDIX C 1 ONE BAR CT ENCLOSURE SHALL CONTAIN 3 4 EXTERIOR PLYWOOD BACK ING SEE NOTE 2 SEE NOTE 2 APPENDIX C 1 APPENDIX C 1 SEE NOTE 3 APPENDIX FOR ENCLOSURE DEPTH 2 MINIMUM SEE NOTE 2 APPENDIX C 1 NEUTRAL TYPICAL CT ARRANGEMENT CTs MAY BE INSTALLED HORIZONTALLY AS SHOWN OR VERTICALLY CT CABINET PT CABINET AND ME TER SOCKET MAY BE MOUNTED ON THE RIGHT OR LEFT SIDE THE CT CABINET NEUTRAL FLOATED DO NOT DRIVE SEPARATE GROUND ROD SUPPLY Effective April 1 2015 99 CURREN
113. reads Conduit for sec All Customers ondary and streetlight cables shall have a mini mum cover of 30 inches and maximum of 42 Effective April 1 2015 114 APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL 2014 MANUAL PAGE SECTION ITEM REVISION 26 27 29 29 30 31 6 3 Underground Conduit Address Requirements Customers 6 4 Overhead Primary Metering Over 600 volts Company Responsibility 6 5 Underground Primary Transformers Beyond Metering Over 600 volts Primary Metering 6 5 Underground Primary Company Owned Trans Metering Over 600 volts formers 7 0 Conductor Identifica Multiple Conductors per tion Phase 8 0 Service Conductor Conductor Sizes Sizes and Connections 9 0 Metering Equipment Metering Removed address requirements in this section already addressed on page 17 under Customer Responsibilities Removed last three paragraphs in this section and replaced them with Location of primary meter ing shall be at the property line Contact Compa ny representative for metering design and review of customer s proposed primary system Approval from the company is required before any installa tion Changed first sentence now reads For any new primary metering the customer must furnish own maintain and operate all transformers locat ed beyond the first point of attachment Changed first sentence now reads For exi
114. rection techniques Load Balance If poly phase service is provided the customer must maintain reasonable electrical balance between the phases as measured at the meter Effective April 1 2015 16 5 0 SERVICE INFORMATION Company Customer Responsibility Service Agreement Service Location To avoid unnecessary expenses or delays the customer is required to contact a Company representative before construction or remodeling begins For residential services the customer must submit the following to a Company representative A completed and signed service application Electrical service entrance diagram and location Must post address prior to installation of service Site must meet requirements identified on the service application 9 9 For all service other than residential single family or duplex customer must submit the following to a Company representative minimum of two sets of e Plot plans e Building elevations e Electrical service entrance diagrams e Connected load e Anticipated demand An electronic copy of site plan in CAD file A completed and signed application Must post address prior to installation of service These items will be used to discuss the most economical and mutually beneficial service location A Company representative will submit an agreement or proposal to the customer to be signed and returned A Company representative will discuss and determine the
115. res Effective April 1 2015 Hinged Instrument Trans Appendix C 1 Item 5 120 Added centered as best as possible to first sen tence APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL 2014 MANUAL SECTION ITEM REVISION PAGE 98 Hinged Instrument Trans Appendix C 1 Item 7 Aluminum or stainless steel is recom former Enclosures mended 98 Hinged Instrument Trans Appendix C 1 Item 13 Changed Item 13 to read Instrument transform former Enclosures er enclosures shall be grounded per NEC Article 250 and Company requirements as shown in Ap pendix C 2 99 Hinged Instrument Trans Appendix C 2 Added graphics for Current Potential Transform former Enclosures er Enclosure Bonding 106 Meter Pedestal Installa Item 1 Removed or treated 6 inch by 6 inch wood post tion for Instrument Trans No wood posts are allowed former Metering 106 Meter Pedestal Installa Removed last sentence Potential transformers are tion for Instrument Trans required only for 277 480 V in certain services former Metering areas Contact A Company representative for details 112 Revisions Made to the Appendix J Inserted new revision log 2011 Electric Service Manual Effective April 1 2015 121 APPENDIX J AMENDMENTS Effective April 1 2015 2014 MANUAL SECTION ITEM REVISION PAGE 20 6 0 Service and S
116. riser pipe to allow for expansion contraction and settling The Company will not be responsible for any damage to customers equipment due to settling Please refer to Figure 13 and Figure 14 The bottom end of the service riser pipe shall be installed at least 18 inches and at most 24 inches below final grade The customer or contractor must install a bushing or terminal fitting with an integral bushed opening on the bottom end of the service riser pipe The service riser pipe shall be securely fastened to the wall with two hole conduit straps Please refer to Figure 13 6 0 BACKFILL 6 1 6 2 Effective April 1 2015 108 After the cable has been placed the trench shall be backfilled using clean soil Six feet of trench shall be left open immediately adjacent to a Company owned enclosure At the meter setting the bottom end of the riser pipe must be left exposed Backfill within four inches of cables must be clear of any rocks or debris If backfill is not clear of rocks or debris service conductors must be installed in conduit as described in Section 4 1 Red marking tape is to be laid in the cable trench 20 inches below final grade Marking tape must be left exposed at both ends of the trench The customer or contractor is responsible for all backfill except six feet of trench immediately adjacent to Company owned enclosures and the exposed end of the meter rise pipe Three feet of trench immediately adjacent to the Company owned enclos
117. rthur lowa Aspinwall Astor lowa Athelstan lowa No Attica Iowa Auburn Whsle Iowa Audubon Iowa No Austinville Iowa Avoca Iowa No AvonLake Iowa Ayrshire Iowa Badger Iowa Barnes City Iowa Barnum Iowa No Bartlett Iowa Battle Creek Iowa Beacon Iowa Bedford Iowa No Beech Iowa No Beeds Lake Iowa No Beloit Iowa No Bentley Iowa No Berwick Iowa Bettendorf Iowa Bevington lowa No Bingham Norwich Iowa Blanchard Iowa Blencoe Iowa Blue Grass Iowa Bode Iowa Bondurant Iowa No Booneville Iowa No Botna Iowa No Bowsher lowa Boyden Iowa No Boyer lowa Braddyville lowa Bradgate lowa Brayton lowa Breda Whsle Iowa No Bremer Iowa Bristow Iowa Bronson Iowa No Brooks Iowa Brunsville INC z Incorporated Effective April 1 2015 COUNTY Hardin Warren Dallas Polk Butler Polk Lyon Fremont Polk Carroll O Brien Butler Crawford Ida Crawford Crawford Taylor Marion Sac Audubon Butler Pottawattamie Polk Palo Alto Webster Mahaska Webster Fremont Ida Mahaska Taylor Warren Franklin Lyon Pottawattamie Polk Scott Madison Page Page Monona Scott Humboldt Polk Dallas Shelby Polk Sioux Crawford Page Humboldt Audubon Carroll Bremer Butler Woodbury Adams Plymouth STATE Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa Iowa
118. ry installed on Customers commercial industrial customer property must be installed in a Company approved customer provided conduit system which may include manholes or vaults Single phase Customers requiring single phase service will be required to install conduit for Customers the following conditions Under existing or likely future hard surface areas Where area available for trenching is limited by any of the following e Less than 10 feet clear width Less than 10 feet clear height e Slope greater than 1 to 3 e Distance between paved areas is less than 50 feet Where the edge of the non trenchable surface on property line is parallel to and within 5 feet of the structure foundation Where a single corridor is used for multiple utilities Where existing or future landscaping or obstructions will make cable installation location and repair difficult Where the customer wants to expedite cable installation Where a developer is paving a street with islands or medians and it is necessary to install cable either street lighting or primary Effective April 1 2015 Continued on next page 25 6 3 UNDERGROUND CONDUIT Continued Typical Size single phase primary 2 inch Conduit three phase primary 4 0 or smaller 4 inch Requirements three phase primary 500 kcmil or larger 6 inch Customers single phase secondary 1 0 4 0 and 350 4 inch single phase services 1 0 4 0 2 5 inch Single phase
119. s NEC Section 230 27 230 28 230 29 See Figures 3 and 4 Continued on next page Effective April 1 2015 19 6 0 SERVICE AND SERVICE ENTRANCES General Continued Conductor It is recommended that customer installed service conductor ampacity be Sizing matched to the main breaker size The minimum size allowed for service entrance conductors is 8 AWG Although it is not recommended the grounded neutral may be reduced in ampacity in accordance with the NEC However if the neutral is reduced more than two sizes calculations justifying the reduction must be accepted by the Company The grounded neutral may be bare copper conductor or may be insulated and marked with a white or natural gray color NEC Section 200 6 200 7 230 41 Equipment AII service entrance equipment shall be UL listed Specifications Meter sockets shall meet Company specifications and shall be UL Listed See Appendix A Contact your Company representative for an approved meter socket list or see MidAmerican Energy website Service entrances for residential customers shall have a rated ampacity of at least 100 amperes at 120 240 volts three wire single phase A minimum 200 amp meter socket is required for all underground residential services smaller than 200 amps If the service size is 400 amps or less self contained metering will be used Service Only service entrance conductors shall be installed in the service entrance Entrance cond
120. se padmount transformers any size will incorporate secondary containment measures to minimize a potential oil release The following secondary containment design is recommended An alternate design may be used with approval by MidAmerican Energy For additional information on oil spill prevention or SPCC Plans contact MidAmerican Energy Company environmental services at 515 281 2951 To discuss an alternative containment design contact local MidAmerican Energy Company distribution engineering personnel Transformer Pad TRENCH ON FOUR SIDES 2 DEEP X 3 WIDE SILT FENCE FABRIC THAT WILL ALLOW WATER TO PASS THROUGH oe 3 ROCK SCREENED Transformer Pad Screened y TTL 2 0 2 0 3 0 3 0 Silt Fence Fabric or other soil fabric with equal or lower porosity Effective April 1 2015 89 APPENDIX B 2 CONCRETE PAD SPECIFICATION 3 PHASE PAD MOUNTED TRANSFORMERS 1 0 GENERAL 1 1 12 Scope of Work The Contractor shall furnish all labor materials formwork equipment and services required to complete all concrete pad work shown on the drawings specified in this appendix Quality Assurance 1 2 4 gt Codes and Standards Comply with provisions of following codes specifications and standards except where more stringent requirements are shown or specified ACI 301 Specifications for Structural Concrete for Buildings ACI 318 Building Code Requirements for Reinf
121. services 350 kcmil 3 inch Number one for residential local distribution engineering s discretion for commercial industrial Material schedule 40 PVC stick or schedule 40 HDPE coilable Riser service riser conduit must be galvanized rigid or schedule 80 PVC Color gray or black with red stripe only no other colors allowed Local Engineering must be contacted before installation Sweep Material fiberglass or steel which must be grounded or HDPE coilable Requirements with special approval Sweeps must be burn proof exceeding burn All Customers resistant rating and steel sweeps must include ground lugs and must be bonded where exposed per the NEC Radius 3 or less 36 sweep over 3 48 sweep Installation Requirements Conduit materials and installation methods must be acceptable to the Company All Customers e All conduit depth measurements are from finished grade e Conduit for primary cables shall have a minimum cover of 42 inches and maximum cover of 48 inches e Conduit for secondary and streetlight cables shall have a minimum cover of 30 inches and maximum of 42 inches e Customer will install a synthetic 1 4 inch pull line of 200 Ib test in the conduit e Customer will cap the end of the conduit and mark it with a stake Company supplied locator ball may be required in addition to a stake e The bottom of the trench in which the conduit is placed should be relatively smooth undisturbed earth well t
122. sting primary metered customers the Company may provide standard distribution transformers located beyond the first point of attachment Changed sentence now reads When multiple conductors per phase are needed for a service the phase wires must be identified with colored tape so the proper grouping can be determined The tape must be installed below the termination height so the grouping remains identifiable after cutting the cables to their final height Added sentence No conductor size above 750 kcmil is allowed including compressed and com pact conductors Added including 480 volt PT supply wiring to second bullet point Now reads Use of meter sockets and other Company sealed enclosures as junction boxes and raceways for customer s cir cuits including 480 volt PT supply wiring Effective April 1 2015 115 APPENDIX J 2014 MANUAL PAGE REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL SECTION ITEM 33 9 0 Metering Equipment 9 0 Metering Equipment Current Transformer Potential Transformer REVISION Changed wording now reads For service sizes 1200 amps and below current transformers re quired for metering shall be installed in a separate cabinet reference Appendices C 3 C 4 C 5 and C 6 With Company approval current transform ers may be installed in transformers for service above 1200 amps See your local distribution engineering contact Removed last two sentences
123. t or 2 inch by 1 4 inch minimum size channel angle iron Meter socket conduit brackets Weld or bolt uni strut brackets to pedestal support Length of brackets and vertical spacing will be determined by meter socket and conduit dimensions Cap Pedestal support shall have either a welded or threaded cap or be filled with concrete and rounded on top Conduit 1 inch rigid galvanized steel or schedule 80 PVC conduit shall be installed between meter socket and padmount transformer Meter socket meeting Company specifications with test switches not shown e Company approved location within 35 circuit feet of transformer e Finished pedestal to be either primed and painted or galvanized Driven ground rod Current transformers shall not be mounted in single phase transformers Current transformers not shown may be mounted on secondary spades of three phase transformer with prior Company approval Company furnishes and installs bushing mounted current transformers and metering wires from the instrument transformers to the test switches in the meter socket Effective April 1 2015 106 APPENDIX SPECIFICATIONS FOR INSTALLATION OF UNDERGROUND RESIDENTIAL SERVICES BY CUSTOMERS OR CONTRACTORS 1 0 SCOPE 1 1 1 2 This specification covers requirements for single phase 120 240 Volt three wire underground residential services rated 400 Amps or less and installed by customers or their contractors The Company will
124. tacked back to front Rebar is speci fied 4 for all re rods Removed grass and dirt that was shown over the rock and made the rock larger Construction Details Customer Furnished Pads for 3 Phase Pad Mounted Transformers 750 1000 kVA Appendix B 4 Change Appendix B 4 to Appendix B 5 Construction Details Customer Furnished Pads for 3 Phase Pad Mounted Transformers 750 1000 kVA Construction Details Customer Furnished Pads for 3 Phase Pad Mounted Transformers 1500 2500 kVA Appendix B 4 Appendix B 5 Graphic changes Widened primary box to 16 to accommodate larger conduits or more conduits Centered conduits and moved to the back of the box out not stacked back to front Rebar is speci fied 4 for all re rods Rebar is now specified 5 for the pad Removed grass and dirt that was shown over the rock and made the rock larger Change Appendix B 5 to Appendix B 6 Construction Details Customer Furnished Pads for 3 Phase Pad Mounted Transformers 1500 2500 kVA Appendix B 5 Graphic changes Widened primary box to 16 to accommodate larger conduits or more conduits Centered conduits and moved to the back of the box out not stacked back to front Rebar is speci fied 4 for all re rods Removed grass and dirt that was shown over the rock and made the rock larger Construction Details Pad for 1 Phase Pad Mounted Transformer Appendix B 6 Removed page from manual former Enclosu
125. th the following Installation and Capacity of Load Size Wiring Metering Refer To Single phase Self contained socket type Figures 27 29 400 amps or less Three phase Self contained socket type with Figures 30 32 400 amps or less manual clamping jaw bypass lever Single phase or Socket type with instrument Figures 33 34 Three phase transformers over 400 amps The following are prohibited e Splices in instrument transformer cabinets or meter sockets for the purpose of service entrance conductor extensions to additional metering points or customer equipment e Use of meter sockets and other Company sealed enclosures as junction boxes and raceways for customer s circuits including 480 volt PT supply wiring e Meter sockets with automatic bypass Meter Socket Meter sockets must be firmly attached to the structure Mounting e Mounting screws should be e One quarter inch diameter e At least two inches long e At least two screws should penetrate a wall stud e If attachment is made between studs molly bolts or equivalent are required to provide adequate holding strength e If padmount metering with meter socket mounted adjacent to transformer see Figure 14 or for instrument metering see Appendix F Continued on next page Effective April 1 2015 32 9 0 METERING EQUIPMENT Continued Company Responsibility Customer Responsibility Padlocks or Seals Current Transformer Potential Transformer
126. therhead is to be located no lower than the service attachment point to insure a positive drip loop 3 Contact your Company representative for entrance and meter location The Company will refuse connection to any service entrance not installed in an approved location 4 customer shall install a suitable service attachment point to obtain proper ground clearance See Figure 3 5 Service entrance conductors must be in conduit Effective April 1 2015 39 FIGURE 1 SERVICE CONDUCTOR CLEARANCES OVER ROOFS Clearances shown are for multiplex duplex triplex and quadruplex service drop conductors Open wire service conductors require greater clearances GENERAL REQUIREMENTS 1 The customer shall install a suitable service attachment point For proper ground clearance see Figure 1 For adequate strength requirement see Figures 3 and 4 2 Eyebolts connected directly to the roof will not be approved 3 The service weatherhead is to be located no lower than the service attachment point to insure a positive drip loop 4 Service drop conductor shall not pass over or within 3 5 feet of furnace chimney antenna fireplace or sewer vents See Figure QA NESC 234 C 1 b and NESC Table 234 1 SPECIAL CONDITIONS REQUIRED FOR USING CLEARANCES SHOWN IN FIGURE 2 B 5 Voltage between open conductors is 300 volts or less and for multiplex conductors up to 750 volts 6 The service entrance mast must not be more than 4 feet
127. tion per NEC Section 210 8 5 For pedestals attached to the masonry footings or basement walls use three and one half 3 1 2 inch length bolts minimum for secure mounting Meter pedestal may be installed be fore house frame is constructed to eliminate the need for a temporary service 6 Minimum specifications for meter pedestal are as follows A Free standing meter pedestals shall have a disconnect and overcurrent device on the load side of the meter B Meter pedestals shall have a removable cover for access to utility connection terminals C Meter pedestal shall have one provision for a seal lock or sealable bolt to secure the line side enclosure Key locks will not be approved D meter mounting equipment shall meet the requirements listed in Appendix A E All pedestal materials shall be fiberglass steel or wood Steel shall have a minimum of 14 gauge and plated or galvanized The finish shall be tough non fading and have a long ser vice life Wood shall be treated 6 inch by 6 inch post meter pedestals shall be bonded to the neutral conductor The neutral conductor shall be equipped with a lug for exclusive use of a copper ground wire G Customer installed wire should not impede the installation of Company wires Effective April 1 2015 58 FIGURE 14 NOTES TYPICAL UNDERGROUND RESIDENTIAL SERVICE METER PEDESTAL FREE STANDING UNIT ATTACHED TO STRUCTURE _ STRUCTURE
128. to include specific secondary pedestal and transformer hole sizes and washer sizes needed for each APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL 2014 MANUAL SECTION ITEM REVISION PAGE 57 Typical Underground Figure 13 Service Char Removed Minimum from the Conduit Size Residential Service acteristics chart chart heading 57 Typical Underground Figure 13 last sentence Now reads Services smaller than 200 amp are Residential Service on page allowed but a minimum 200 amp underground meter socket and 2 1 2 conduit are both re quired 59 Typical Underground Figure 14 Added notation to graphics Service lateral con Residential Service Meter duit must be securely attached to meter socket Pedestal using either two locknuts and an insulating bush ing or a threaded hub Also identified insulated bushing on graphics 71 Typical Group Metering Figure 26 Modified graphics to show 16 meter bank for More than Six Meters or Any Meters in Network Areas Factory Fabricated 72 Self Contained Meter Figure 27 Item 7 Added the following sentence Commercial Socket Wiring 1 Phase sockets less than 200 amps require a horn by 120V 2 Wire 60A Max pass 1 Phase 120 240 V 3 Wire 100 A 200 A 72 Self Contained Meter Figure 27 Item 8 Removed Item 8 Socket Wiring 1 Phase 120V 2 Wire 60A Max 1 Phase 120 240 V 3 Wire 100 A 200 A 74 Self Contained Meter Fig
129. uit Conductors Service entrance conductors shall not exceed 10 per phase The service drop and attachment point shall not be enclosed within any buildings alteration facade or addition The point of attachment shall be on the side of the structure adjacent to the distribution facilities Clearance If changes occur to a customer s property such as grade changes or Requirements construction of decks or garages which result in inadequate clearance the customer will be required to relocate or bring the service into compliance with current NEC and or NESC requirements Refer to Figures 1 and 2 Continued on next page Effective April 1 2015 20 6 0 SERVICE AND SERVICE ENTRANCES General Continued Meter meter and related metering equipment locations shall be approved by Location Company Unless Company approval of an exception is given all meters and related metering equipment must be Installed outside and securely attached to a permanent structure Located on the front half of the structure Accessible to Company employees Protected from physical damage Provided with adequate traffic protection if deemed necessary by the Company Separated from a source of combustion by at least 3 feet In compliance with Figure 1 Meter Poles If a meter pole is used it shall be e Owned and installed by the customer except for primary metered customers e Ina location mutually agreed upon between the customer and t
130. ure 28 Added new graphics for 200 A socket with bypass Socket Wiring 1 Phase lever Changed title of page to reflect addition 120 240 V 3 Wire 320 A Socket 400 A Entrance 74 Self Contained Meter Figure 28 Item 7 Reworded now reads Commercial sockets of Socket Wiring 1 Phase 200 amps require a manual clamping jaw lever 120 240 V 3 Wire 320 A bypass Commercial sockets less than 200 amps Socket 400 A Entrance require a horn bypass 74 Self Contained Meter Figure 28 Item 8 Removed Item 8 Socket Wiring 1 Phase 120 240 V 3 Wire 320 A Socket 400 A Entrance Effective April 1 2015 117 APPENDIX J REVISIONS MADE TO THE 2011 ELECTRIC SERVICE MANUAL SECTION Self Contained Meter Socket Wiring 3 Phase 277 480 V 4 Wire 400 A or Less Figure 31 Item 4 REVISION Added sentence It is the customer s responsibil ity to determine if the disconnect switch should be fused or unfused 80 Instrument Transformer Metering Greater than 400 A Requirements for Meter Mounting Equipment 88 Location of Customer Furnished Pads for 3 Phase Pad Mounted Transformers Sizes Figure 33 Notes Item 13 Item 8 Installation Ease Appendix B 1 Graphics New Item 13 The 1 conduit from the meter socket enclosure to the instrument transformer enclosure must be continuous and contain less than three 90 degree bends The use of any con duit body fitting LB LL LR etc
131. ure and the exposed end of the meter riser pipe will be backfilled by the Company at the time the service is connected APPENDIX G SPECIFICATIONS FOR INSTALLATION OF UNDERGROUND RESIDENTIAL SERVICES BY CUSTOMERS OR CONTRACTORS 6 3 The Company is not responsible for restoring sunken service trenches The customer or contractor is encouraged to tamp backfill to minimize settling of trenches 7 0 SITE REVIEW 7 The customer or contractor must call the Company and schedule a site review after the service cable is installed Both ends of the trench at the electric meter and at the Company s enclosure must be left open for the review Ends of the red marking tape must be exposed at both ends of the trench The bottom end of the riser pipe must be visible at the meter end of the trench 8 0 CONNECTIONS 81 The customer or contractor shall install and connect the service conductors in the customer s meter socket Oxide inhibitor shall be used on aluminum conductor connections Conductors shall be looped in the top of the meter socket as shown in Figure 27 D 8 2 Meter socket terminals shall not be energized by any backfeed from the customer s main panel 83 Company will make connections at Company owned equipment and install the electric meter in the customer s meter socket 9 0 OWNERSHIP OF SERVICE CONDUCTORS 91 The customer or contractor shall own and maintain service conductors until such time as the Company approves the i
132. urrent for smaller motors five horsepower and under Contact Company representative regarding any starting current limitations or information on high efficiency motors Special The installation of certain special types of equipment may have an adverse Equipment effect upon the electric service to adjacent customers The customer is responsible for any cost associated with alleviating adverse effects caused by the installation of special equipment Types of special equipment in this category include but are not limited to Grain bin motors Welders X ray equipment Diathermy equipment Radio transmitters Geothermal heat pumps Tankless water heaters Prior to installation contact Company representatives to determine if any specific installation requirements are necessary Power Factor low power factor in a customer s electric system produces an adverse effect on the Company s electric supply system and e Customer s electrical equipment Continued on next page Effective April 1 2015 15 4 0 MOTORS AND SPECIAL EQUIPMENT Continued Additional charges may be imposed on the customer when the customer s power factor falls below a specified limit as stated in the rate schedules of the Company s tariff It may be cost effective for the customer to install high power factor equipment and or capacitors to maintain an acceptable power factor Contact your Company representative for information regarding power factor cor
133. y covering or white paint or tape Reference page 30 7 When using aluminum conductors wire brush the conductors and apply an oxide inhibitor on all connections 8 Working space of not less than 36 inches in front of service entrance equipment and meter sockets and 30 inches wide shall be maintained in accordance with NEC Section 110 26 Reference page 21 The neutral shall be installed from the source to the overcurrent device 10 Commercial installations require a manual clamping jaw lever bypass x FIGURE 31 THIS PAGE WAS INTENTIONALLY LEFT BLANK Effective April 1 2015 77 SELF CONTAINED METER SOCKET WIRING 3 PHASE 120 240 V 4 WIRE 400 A MAX 3 PHASE 120 208 V 4 WIRE 400 A MAX 3 PHASE 277 480 V 4 WIRE 400 A MAX 1 If the service size is 400 amps or less self contained metering will be used 2 meter sockets shall meet Company specifications see Appendix A 3 A disconnect switch shall be installed on the source side immediately adjacent to each 277 480 V self contained meter setting in a cold sequenced switch meter load configuration The switch shall have provisions for padlocking in the open position and for installing a Company seal in the closed position The disconnect may be fused or unfused depending on what is needed to meet MEC and NEC fault current requirements for the particular application 4 Working space in front of service entrance equipment and meter sockets shall be

2014 Electric Service Manual

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