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User's Guide - Construction Book Express

1. Steps Keystrokes Display Clear calculator 0 Enter Kilowatt e 5 3 5 Hours Find Equivalent e BTU 11 953 552 BTU 56 ElectriCalc Pro What is the kw hr rating for a 4 500 BTU heater Steps Keystrokes Display Clear calculator 0 Enter BTU 4 5 0 0 4 500 Rating Find Equivalent KW H 1 3176 Kilowatt Hours Parallel Resistance Find the equivalent resistane for 10 Ohm 20 Ohm and 50 Ohm resistors placed in parallel Steps Keystrokes Display Clear calculator 0 Enter 1 Resistor 1 0 GEM P RS 10 Enter 2 Resistor 2 0 GE GED P RS 6 6666667 Enter 3 Resistor 5 0 G amp D P RS 5 8823529 NOTE The total is recalculated with each additional resistor value entered User s Guide 57 The error codes for the ElectriCalc Pro are listed below Note To clear an error perform a Clear All E DISPLAY ERROR DESCRIPTION OFLO Answer too large to display ENT Error Invalid or out of scale entry POWR Error PF or EFF calculated above 100 nonE Conduit Size beyond limits of table Unable to calculate Voltage Drop wire Size Amps Length too high Temperature setting out of range for wire calculation HP Error Invalid HP entry per NEC table FULL Error Entered or calculated more than 15 different wires sizes EROM Error Bad EROM MATH Error Math error i e divide by zero Battery Information The calculator is powered by a single 3 Volt Lithium CR 2032 ba
2. is entered as 75 etc Gata ERD Number of Wires Used to enter or calculate the number of wires in a raceway and calculate cross sectional wire area First Press Enters number of wires or calculates maximum number of wires in conduit Displays TTL WIRES calculated or WIRES entered Second Press Shows total cross sectional area for all entered wires Displays WIRE AREA entered or TTL WIRE AREA calculated Third Press Shows total cross sectional area of all entered wires of the selected wire insu lation Displays TTL WIRE AREA 18 ElectriCalc Pro Conduit Size Used to find conduit sizes based on the total area of the entered wire types and sizes up to 15 at one time If the quantity and insulation type has not been entered the calculator will assume 2 THHN wires for single phase or 3 THHN wires for three phase calculations First Press Enters or calculates conduit size Displays COND SIZE NOTE If a wire size has not been en tered or calculated or an invalid con duit size is entered the calculator will display nonE Second Press Shows total number of wires in the conduit for calculated conduit size Shows the conduit internal area for an entered conduit Displays TTL WIRES calculated or COND AREA entered NOTE Third through fifth presses dis play only for calculated conduit sizes Third Press Shows fill percentage for the calculated conduit s
3. 2 AMB 20 C Find adjusted wire size Wiresz AWG 00 CU Amb WIRE SIZE Display Wire uua 00 202 8 Ampacity Amb WIRE A Display CMIL CE CMIL 133 100 WIRE Display NEC Table MZB NEC 310 16 Reset ambient temperature 0 E 2 AMB 30 C NOTE See Settings on page 62 for a list of Permanent Values settings Changing these settings may affect your calculations 36 ElectriCalc Pro Wire Sizing Based on Material Type Find the wire size for a 75 C copper wire carrying a 30 load of 265 Amps What is the equivalent aluminum wire size Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Set to 75 C Set 3075 Cu 3 PH Enter Amps 2 6 5 AMPS 265 Find wire size Uso AWG 300 CU WIRE SIZE Change to alum 4 AWG 400 AL WIRE SIZE Display Wire uue 400 270 0 Ampacity AI WIRE A Display CMIL Q CMIL 400 000 WIRE Display NEC Table MZB NEC 310 16 Reset to copper 4 30 75 Cu 0 and Clear NOTE See Settings on page 62 for a list of Permanent Values settings Changing these settings may affect your calculations User s Guide 37 Sizing Parallel Conductors What size 60 C insulated copper wire is required for a single conductor carrying a 500 Amp load in a Free Air environment 30 C amb temp What size for 2 par allel conductors For 3 conductors Steps Keystrokes Display Clear calculator 0 Set to 60 C ED 46 30 60 Cu 0 Set free air mode 5 3060 FrAi
4. 3 PH Set power factor 1 0 0 6 CD PF 100 Enter Amps 9 0 AMPS 90 Enter Volts 2 0 VOLT 208 Solve for kW aa KW 32 423991 The ElectriCalc Pro s built in Ohm s Law functions allow you to easily solve for Voltage Volts current Amps or resist ance Ohms by entering in any two vari ables e g Volts and Amps and solving for the third e g Ohms Ohm s Law V IxR The Ohm s Law functions on the ElectriCalc Pro are identified as follows e Vdc Voltage in Volts e Idc current in Amps e R resistance in Ohms User s Guide 29 Finding Volts The current in a circuit is 0 0125 Amps and the total resistance is 480 Ohms Find the Voltage Steps Keystrokes sel Clear calculator Enter current e 0 1 2 5 Gp Idc 0 0125 Enter resistance 4 8 0 GQ OHMS 480 Find Voltage Set Vdc 6 Finding Amps An 120k electrical resistor is plugged into a 12 volt circuit Find the current in Amps Steps Keystrokes Display Clear calculator 0 Enter resistance 1 2 0 CS Gy KOHM 120 Enter Voltage 1 2 set Vde 12 Find current Set Idc 0 0001 Finding Ohms An electrical circuit operating at 240 Volts has a current of 14 6 Amperes Find the total resistance in Ohms of the circuit Steps Keystrokes Display Clear calculator 0 Enter Voltage 2 4 0 GQ Vdc 240 Enter current 1 4 e 6 Gp Idc 14 6 Find resistance E9 OHMS 16 438356 30 ElectriCalc
5. 125 Find max ampacity MEB 14 20 0 WIRE A125 Display will show wire size in the upper left when displaying wire ampacity rating Finding Synchronous Motor Horsepower Asynchronous motor is defined as having a 27 Amp load on a 240 Volt 3 circuit What is its Horsepower Steps Keystrokes Display Clear calculator 0 Set to 3 phase amp 3 PH Set to synch amp SYNC 0 Enter Volts 2 4 0 28 VOLT 240 Enter Amps 2 AMPS 27 Solve for HP HPmotor SYNC 25 HP Set to ind motor E 8 Gy IND 0 32 ElectriCalc Pro Finding Direct Current Motor Horsepower Adirect current motor is defined as having a 10 Amp load on a 180 Volt circuit What is its horsepower Steps Keystrokes Display Clear calculator 0 Set to DC motor B 8 Gy DC 0 Enter Volts 1 8 0 KI VOLT 180 Enter Amps 1 0 AMPS 10 Solve for HP HPmotor DC 2 HP Set to ind motor E IND 0 User s Guide 33 Ampacity Wire Sizing The required wire size of a service con ductor can be determined based on the specified electrical requirements and the GE key The wire size is automatically recalculated whenever the wire insulation temperature ratings or wire material cop per or aluminum types are revised Wire sizing is based on the requirements defined in NEC Tables 310 16 and 310 17 Wire Sizing Based on Insulation Rating Wiring is being installed in a 240 Volt single phase system rated at 30 kVA What is the wire size nee
6. 60 C ED 6 30 60 Cu 0 Enter Volt amps 4 7 6 5 0 VA 47 650 Enter Volts 2 4 0 VOLT 240 Set to 50 C amb 5 0 E 2 AMB 50 C Find adj wire size MEB AWG 250 CU Amb WIRE SIZE Find derated 8 Ge GS DR 500 CU wire size Amb WIRE SIZE Display Wire so D R 46 5 Ampacity Amb WIRE A Display Adjust B ADJ 41 Factor Amb Display NEC Table GEIS NEC 310 15 Set to 30 C 0 set 2 0 and Clear NOTE All Settings should be changed back to default to avoid conflicts in answers throughout the rest of this manu al See Settings for a list of Permanent Values settings Changing these settings may affect your calculations 40 ElectriCalc Pro Voltage Drop The reduction in Voltage between the power source and the load can be de termined by entering the Phase Volts Amps wire material Voltage drop wire size and length of run The calculator determines resistance and then the Voltage reduction Voltage drop can be displayed as Volts dropped or as a percent reduction of potential load This calculator also finds Voltage drop wire size once you have entered or calculated the phase Volts Amps Length wire type and allowable VD percentage It will solve for the distance GID once you have entered or calculated the phase Volts Amps wire type Voltage drop wire size and allow able VD percentage The ElectriCalc Pro uses resistance values found in NEC Table 8 Chapter 9 to determin
7. as VA VA 43 370 Enter Volts 2 4 0 VOLT 240 Solve for Amps AMPS 180 70833 Finding Amps from Kilowatts What is the amperage for a 75 kW load connected in a 120 208 Volt 3 circuit Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Enter kilowatts Sa ea KW 75 Enter Volts 2 0 VOLT 208 Solve for Amps AMPS 208 17918 User s Guide 27 Finding Volt Amps What is the VA rating for a 120 Volt 22 Amp 1 circuit What is the kVA rating Steps Keystrokes Display Clear calculator 0 Set to 1 phase B D 1 PH Enter Volts Dao VOLT 120 Enter Amps 2 2 AMPS 22 Solve Volt amps VA 2 640 Solve for kVA i KVA 2 64 Finding kVA Rating What is the kVA rating for a 120 208 Volt three phase 65 Amp transformer Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Enter Volts 2 0 VOLT 208 Enter Amps 6 5 AMPS 65 Solve for kVA KVA 23 417327 Finding Wattage A 120 Volt single phase 45 Amp electri cal motor has an 87 power factor What is its wattage Steps Keystrokes Display Clear calculator 0 Set to 1 phase set KED 1 PH Enter Volts 2 0 VOLT 120 Set power factor Gap eG PF 87 Enter Amps 4 5 AMPS 45 Solve for Watts 2p WATT 4 698 28 ElectriCalc Pro Finding kW Rating What s the kW rating for a 90 Amp 208 Volt three phase broiler with 100 power factor Steps Keystrokes Display Clear calculator 0 Set to 3 phase
8. s Guide 11 c GID Wire Resistance Wire Res Displays the actual resistance per 1 000 feet of the wire size in 9 based on NEC Chapter 9 Table 8 Displays OHMS WIRE Ground Function Key Cit Ground An output only key used to find the grounding electrode conductor size for AC systems based on NEC Table 250 66 and an entered or calculated service entrance conductor largest size Only actual wire sizes are con sidered valid entries First Press Calculates the copper grounding elec trode conductor size if you have en tered a valid wire size Displays GRND CU WIRE SIZE Second Press Displays the aluminum grounding elec trode conductor size Displays GRND AL WIRE SIZE Third Press Displays the Circular Mil area used to calculate the grounding electrode con ductor size Displays CMIL WIRE 12 ElectriCalc Pro Fourth Press Displays the NEC table referenced for the calculation Displays NEC 250 66 c GI Equipment Ground EqGrnd This function uses NEC Table 250 122 to calculate the minimum equipment grounding conductor size given an entered amperage rating or setting for a over current device up line e g 300 o an NOTE This function deviates from the NEC Table 250 122 in that 1250 MCM AL is used instead of 1200 as specified in NEC Table 250 122 First Press Displays the copper grounding conduc tor size for the entered Amp rating Displays EQPG WIRE SIZE CU Seco
9. the bat tery located back of calculator top of unit by sliding battery door out with your thumbnail Set aside c Using a screwdriver pop out the square tab located in the middle sec tion on the back of your calculator d Replace it with the new update tab by inserting it into the slot e Replace the battery door f Turn calculator on Your calculator is now updated and ready to use Key Definitions Standard Calculator Functions On Clear Turns on power Pressing once clears the last entry and the display Pressing twice clears all non permanent values CD Off Turns all power off Clears the Memory and most internal registers OGHuGG Arithmetic operation keys 0 M 2 B A 6 Oe O e Used for keying in numbers Percent Four function x Percent key Set Reciprocal 1 x Finds the reciprocal of a number e g Set 0 125 Back Space Function Used to delete entries one keystroke at a time unlike the function which deletes the entire entry E Second Function Used with other keys to access second ary functions Gy Store Used with function keys to store values Displays STOR User s Guide 1 GD Recall Recalls a value stored in a register e g to recall voltage drop press GW M Displays RCL ED Pi x Constant 3 1415927 Change Sign Toggles the sign of the displayed value from positive to
10. 23 Percent Calculations 23 Memory Operations 24 Kirchhoff s Law 26 Ohm s Law 0 00000 ee 29 Motor Horsepower 31 Ampacity Wire Sizing 34 Voltage Drop 000 41 Ground Conductor Wire Size 47 Equipment Grounding Conductor Wire Size 48 Fuse and Circuit Breaker Size 49 Starter Size 00000005 49 Overload Protection Size 50 Conduit Size 0 51 Converting KW HR and BTU 56 Parallel Resistance 57 Error Codes 2 0000ee 58 Battery Information 58 2005 NEC References 59 Updating Future Code Revisions 60 Settings eecdewete da tune das 60 Repair and Return 61 Warranty cee eee eee 62 FCG Class B siecsed oy ete ve tao od 65 Legal Notices 65 Your ElectriCalc Pro is now updateable for future National Electrical Code editions that are updated every three 3 years To upgrade your unit follow the instructions below 1 Purchase the NEC Update from Cl see pricing details from Cls Web site www calculated com or call 1 800 854 8075 This Update is in the form of a chip that contains the new Code 2 Once you receive the NEC Update chip you need to install it in your ElectriCalc Pro a Turn calculator off b As a precaution remove
11. 4 CB Displays D R WIRE SIZE Second Press Displays the maximum adjusted am pacity of the derated wire size Displays D R WIRE A Third Press Displays the derated adjustment factor per the NEC Table 310 15 b 2 a Displays ADJ Fourth Press Displays the NEC table referenced for the calculation Displays NEC 310 15 10 ElectriCalc Pro Voltage Drop Solutions The ElectriCalc Pro will calculate maximum lengths minimum wire sizes or actual voltage drops given the other two values Voltage drop solutions are based on the DC resistance values found in NEC Chapter 9 Table 8 NOTE Voltage drop solutions may vary slightly from actual AC circuit values as the calculator does not incorporate factors such as inductive reactance skin effect raceway material etc Percent Voltage Drop Used to enter or calculate voltage drop The default voltage drop is 3 If wire size or wire length values are not available nonE will display since the voltage drop cannot be found First Press Enters a maximum allowable voltage drop percentage Displays V DROP or calculates actual Voltage drop Displays V DROP Second Press Calculates actual percent Voltage drop Displays V DROP Cr Length Enters or calculates the length of a run for Voltage drop calculation Displays FEET or MET NOTE Units of length can be set to Feet or Meters by use of the Prefer ence function User
12. C B Squirrel Cage Design B SYNC no codE Synchro nous WND no codE Wound Rotor Ci Dual Element Fuse First Press Calculates the minimum Amp rating for a Dual Element Fuse Displays AMPS dE Second Press Displays the full load current percent multiplier used to determine fuse size Displays FLC GD Single Element Fuse SEFuse First Press Displays the minimum Amp rating based on Phase motor type and amperage Displays AMPS SE Second Press Displays the full load current percent multiplier value used to determine fuse size Subsequent presses repeat this cycle Displays FLC User s Guide 15 Set Instantaneous Trip Circuit Breaker InsTrip First Press Displays the minimum Amp rating for an Instantaneous Trip Circuit Breaker based on the phase motor type and amperage Displays AMPS b1 Second Press Displays the full load current percent multiplier value used to determine breaker size Displays FLC Inverse Time Breaker First Press Calculates the minimum Amp rating for an Inverse Time Breaker based on the phase motor type and amperage Displays AMPS b2 Second Press Displays the full load current percent multiplier value used to determine breaker size Displays FLC Overload Protection First Press Displays the overload amperage require ment based on the full load current shown on the motor nameplate Multiplies the ent
13. ELECTRICALC PRO NEC COMPLIANT UPDATEABLE ELECTRICAL CODE CALCULATOR Model 5065 User s Guide CALCULATED J INDUSTRIES Introducing the ElectriCalc Pro Now NEC Updateable The ElectriCalc Pro is an invaluable calculator for today s busy electrical professional Unlike a regular calculator it has intuitively labeled electrical keys and conforms to the 2005 and 2002 1999 1996 and future National Electrical Codes allowing you to solve Code relat ed problems quickly and accurately The most common NEC tables are now at your fingertips An important feature of the ElectriCalc Pro is that it is programmed to accept future NEC changes allowing you to convenient ly install future Code editions in a few sim ple steps The ElectriCalc Pro instantly solves for the following Kirchhoff s Law Ohm s Law Volts Amps Volt Amps Watts kVA kW PF EFF and Resistance Copper or Aluminum Wire Sizes Parallel and Derated Wire Sizes Voltage Drop Wire Sizes and Actual Voltage Drops Voltage Drop Distances and Wire Resis tances Kilowatt hours and BTU s Parallel Resistance Grounding Conductors Sizes Motor Full Load Amps Overload Protection Sizes NEMA Starter Sizes Conduit Sizes And much more Table of Contents Key Definitions 1 Preference Settings 21 Default Settings 22 Basic Math Operations
14. HN wires for 30 when calculating conduit size Display will also show wire size in upper left when displaying maximum ampacity rating NOTE See Settings for a list of Permanent Values settings Changing these settings may affect your calculations Finding Conduit Sizes for Multiple Conductors Same Wire Type and Size Find the minimum IMC conduit size for eleven 6 THHN copper wires Steps Keystrokes Display Clear calculator 0 Enter cond type 4 Gp IMC nonE Enter wire size 6 GS AWG 6 CU WIRE SIZE Enter THHN DORR THHN 11 WIRES Find conduit size IMC 1 25 in COND SIZE Wire size can also be entered in Circular Mis e g 2 4 CHES enters 26 240 CMILs and displays 6 AWG wire size User s Guide 53 Finding Number of Wires in Existing Conduit Same Size Various Types Find the maximum number of 10 THHN copper wires that can be pulled through an existing 3 Inch EMT conduit How many XHHW wires How many THW wires Steps Keystrokes Display Clear calculator 0 Enter cond type 1 Gy EMT nonE COND Enter wire size 1 0 QE AWG 10CU WIRE SIZE Enter conduit size EMT 3 00 in COND SIZE Find max THHN THHN 167 TTL WIRES Find max XHHW XHHW 145 TTL WIRES Find max THW THW 145 TTL WIRES Wire size can also be entered in Circular Mils e g 1 Q 3 8 0 CES enters 10 380 CMILs and displays 10 AWG wire size 54 ElectriCalc Pro Find
15. Pro Motor Horsepower The ElectriCalc Pro can calculate the full load current Amps of a motor based on phase Voltage and motor synchronous induction or DC It uses NEC Tables 430 247 430 248 and 430 250 to determine the motor full load current If you enter a value for HP or Voltage that does not correspond to these tables the unit will display nonE The ElectriCalc Pro can also calculate an equivalent Horsepower for an induc tion synchronous or direct current motor based on a Voltage phase and full load current When calculating motor HP from an entered amperage a result not directly matching a value in NEC Table 430 247 430 248 or 430 250 will cause the calculator to choose the next higher table value for motor Horsepower Finding Single Phase Full Load Current A 2 HP induction motor operates on 230 Volt single phase power What is the full load current for this motor Steps Keystrokes Display Clear calculator 0 Set to i phase B D 1 PH Enter Volts 2 0 VOLT 230 Enter HP 2 Gi IND 2 HP Find full load Amps GES FLC 12 A User s Guide 31 Finding Motor Wire Size and Ampacity Find the wire size required to connect a continuous run 30 3 HP induction motor into a 230V circuit Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Enter Volts 2 3 0 VOLT 230 Enter HP HPmotor IND 3 HP Find load current FLC 9 6 A Find 125 A sie Gay its AWG 14 CU WIRE SIZE
16. alc Pro NOTE See Settings for a list of Permanent Values settings Changing these settings may affect your calculations Finding Three Phase Voltage Drop A 20 Amp three phase load is being fed by a 230 Volt source located 150 Feet away The installation specifications require 75 C 10 THW stranded copper conductor What is the Voltage drop on this branch circuit Steps Keystrokes Display Clear calculator 0 Set to 75 C Set 30 75 Cu 0 Set to 3 phase 30 75 Cu 3 PH Enter Amps 2 0 AMPS 20 Enter Volts 2 3 0 VOLT 230 Enter Length feet 1 5 0 E FEET 150 Find VD wire size ME AWG 10 CU VD WIRE SIZE Solve volt drop DROP 6 4 V Solve v drop DROP 2 8 V NOTE See Settings for a list of Permanent Values settings Changing these settings may affect your calculations User s Guide 43 Finding Voltage Drop Wire Size A 20 Amp three phase 208 Volt load will be located 175 Feet away from the source Assuming a 3 allowable Voltage drop what is the size of 75 C conductor required for this branch circuit Steps Keystrokes Display Clear calculator 0 Set to 75 C 30 75 Cu 0 Enter Amps 2 0 AMPS 20 Enter Volts 2 0 VOLT 208 Enter distance D 7 5 GED FEET 175 Enter allow VD DROP 3 0 V Find wire size Uso AWG 8 CU VD WIRE SIZE Find actual Voltage drop DROP 4 7 V Find v drop DROP 2 3 V NOTE See Settings for a list of Permanent Values se
17. and Volt amps keys to identify milli values Amps Enters or calculates Amps using Volts and VA or Watts Displays AMPS KAMP or mAMP Volts Enters or calculates Volts using Amps HPth and VA or Watts Default value is 240 Volts Displays VOLT KV or mV Volt Amps Enters or calculates Volt amps using Amps Volts and Horsepower or Watts Displays VA KVA or mVA D Watts Enters or calculates Watts using Amps Volts and VA or Horsepower Displays WATT KW or mW Set DC Amps Idc Enters or calculates DC Amps using DC Volts and Resistance Displays Idc User s Guide 5 Set DC Volts Vdc Enters or calculates DC Volts using DC Amps and Resistance Displays Vdc c Z9 DC Resistance R Calculates and displays DC resistance in Ohms using DC Volts and DC Amps Displays R o lp Power Factor PF Enters or calculates power factor per centage based on Watts and VA De faults to 100 Entered or calculated power factors greater than 100 will result in an error Displays PF Ci Horsepower Theoretical Enters or calculates theoretical Horse power based on Amps VA Watts efficiency PF and or Volts 1 0 HPth correlates to 746 Watts at 100 efficiency Displays HPth Ca Efficiency Eff Enters or calculates the percent ratio between real power Watts and theoreti cal Horsepower Default 100 Entered or calculated efficien
18. cies greater than 100 will result in an error Displays EFF Kilowatt Hours to BTU Kw hr gt Btu Calculate BTU British Thermal Unit based on an entered Kilowatt Hour value Displays KW H 6 ElectriCalc Pro BTU to Kilowatt Hours Btu Kw hr Calculate Kilowatt Hours based on an entered BTU British Thermal Unit value Displays BTU E Parallel Resistance Par Res Calculate total resistance based on an entered series of resist ance values Displays P RS Motor Horsepower Functions The ElectriCalc Pro can be used to determine motor full load current Amps based on entries for motor Horsepower HPmotor Phase and Voltage You can also find an equivalent motor Horsepower if you have entered Voltage and full load current values Only HP motor and Voltage entries as defined by NEC Tables 430 247 430 248 and 430 250 can be used to determine motor loads 8 Induction Synchronous DC Motor Toggle Ind Sync DC Toggles between induction synchronous and direct current motor types Displays IND induction default SYNC synchro nous or DC direct current iy Motor Horsepower Enters or calculates motor Horsepower Displays IND HP induction default SYNC HP synchronous or DC HP direct current User s Guide 7 Ampacity Tables The ElectriCalc Pro uses NEC Table 310 16 810 17 for Free Air to find wire sizes and ampacity ratings of wire
19. ded if you use 60 C copper wire Steps Keystrokes Display Clear calculator 0 Set to 1 phase B D 1 PH Enter kVA 00 Co KVA 30 Enter Volts 2 4 0 VOLT 240 Find Amps Amps AMPS 125 Find wire size Uso AWG 0 CU WIRE SIZE Display Wire Ampacity Qs o 125 0 Cu WIRE A Display CMIL Qs CMIL 105 600 WIRE Display NEC Table MEB NEC 310 16 34 ElectriCalc Pro Re sizing Wire Based on Different Insulation Ratings What wire size is required for a 30 75 C copper branch circuit carrying a load of 260 Amps What would the wire size be if 90 C copper is used Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Set to 75 C Set 30 75 Cu 3 PH Enter Amps AMPS 260 Find wire size Us AWG 300 CU WIRE SIZE Change to90 Gay O AWG 0000 CU WIRE SIZE Reset to 60 46 30 60 Cu 0 and Clear Wire Sizing Based on Ambient Temperature Find the 90 C copper wire size needed to connect a 47 700 Volt amp load to a 240 Volt single phase source What is the adjusted wire size if the ambient temperature rating is changed from the default 30 C to 40 C Steps Keystrokes Display Clear calculator 0 Set to i phase B D 1 PH Set to 90 C set 9 1 90 Cu 1 PH Enter VA CUITO VA 47 700 Cont d User s Guide 35 Cont d Steps Keystrokes Display Enter Volts 2 4 0 VOLT 240 Find Amps AMPS 198 75 Find wire size C AWG 000 CU WIRE SIZE Change ambient temperature 2 0 G9
20. e Voltage drop NOTE Voltage drop solutions may vary slightly from actual AC circuit meas urements as the calculator does not incorporate factors such as inductive reactance skin effect raceway mate rial etc In most situations the DC Voltage Drop calculation is sufficient to meet safety standards User s Guide 41 IMPORTANT NOTE ON VOLTAGE DROP CALCULATIONS The ElectriCalc Pro calculates Voltage drop and wire size using DC resistance as defined by the 2005 NEC To find the Voltage drop for a specific wire size you must first enter Amps and the one way wire Length and other required variables entering the specific wire size ast Otherwise for your safety the calculator will recalculate the wire sizes based on the 99 NEC Ampacity Tables and maxi mum allowable Voltage drop Finding Single Phase Voltage Drop You are installing 175 Feet of 75 C 8 THW branch circuit copper conductors to supply an 11A load on a 208V 1 system What is the source Voltage drop at the load Steps Keystrokes Display Clear calculator 0 Set to 1 phase Gg D 1 PH Set to 75 C Set 1075 Cu 1PH Enter Amps Ma AMPS 11 Enter Volts 2 0 VOLT 208 Enter Length D 5 GAD FEET 175 Enter wire size Wn AWG 8 CU WIRE SIZE Solve volt drop DROP 3 0 V Solve v drop DROP 1 4 V Wire size can also be entered in Circular Mils e g 1 6 O 0 IES enters 16 510 CMILs and displays 8 AWG wire size 42 ElectriC
21. e length has been entered displays the minimum wire ampacity rating If no wire length has been entered displays the NEC table referenced for the calculation Displays NEC 310 16 Gp is 125 Ampacity Used for motor wire sizing when the wire must not exceed 80 of its rated ampacity 125 A This keystroke calculates wire size based on 125 of the entered or cal culated Amps value Displays 125 is Parallel Size Used to find the size of parallel conductors using amperage and an entered quantity of wires Parallel wire size calculations small er than 1 0 are displayed as none display shows nonE as the NEC does not allow parallel wire runs smaller than 1 0 First Press When preceded by a number calcu lates the applicable wire size for that quantity of wires in parallel Displays PAR WIRE SIZE Cont d User s Guide 9 Cont d Second Press Displays the maximum adjusted ampacity of the calculated parallel wire size Displays WIRE A NOTE No adjustments are made for deration o GE Derated Wire Size D R Size Used to calculate derated wire sizes and allowable ampacity based on the entered quantity of wires NEC Table 310 16 and NEC Table 310 15 b 2 a Derated wire sizes are not calculated when there are less than four wires or when the unit is in Free Air mode First Press Calculates the derated wire size if you have entered the number of wires for example
22. e limits for a Class B cal culating device pursuant to Subpart J of Part 15 of FCC rules Legal Notices Software copyrighted and licensed to Calculated Industries by Specialty Calculator Technologies LLC 2006 User s Guide copyrighted by Calculated Industries Inc 2006 ElectriCalc and Calculated Industries are registered trademarks of Calculated Industries Inc 4840 Hytech Drive Carson City NV 89706 U S A 1 800 854 8075 Fax 1 775 885 4949 E mail info calculated com www calculated com ALL RIGHTS RESERVED Designed in the U S A User s Guide 65 CALCULATED INDUSTRIES Putting answers at your fingertips since 1978 J J J7 J Printed in China 04 06 SS UGL5065E A
23. efects in materials and workmanship for a period of one 1 year from the date of original consumer purchase in the U S If a defect exists during the warranty peri od Cl at its option will either repair using new or remanufactured parts or replace with a new or remanufactured calculator the product at no charge THE WARRANTY WILL NOT APPLY TO THE PRODUCT IF IT HAS BEEN DAM AGED BY MISUSE ALTERATION ACCI DENT IMPROPER HANDLING OR OPERA TION OR IF UNAUTHORIZED REPAIRS ARE ATTEMPTED OR MADE SOME EXAMPLES OF DAMAGES NOT COVERED BY WARRANTY INCLUDE BUT ARE NOT LIMITED TO BATTERY LEAKAGE BEND ING A BLACK INK SPOT OR VISIBLE CRACKING OF THE LCD WHICH ARE PRESUMED TO BE DAMAGES RESULTING FROM MISUSE OR ABUSE To obtain warranty service in the U S please go to the website A repaired or replacement product assumes the remaining warranty of the original product or 90 days whichever is longer 62 ElectriCalc Pro Non Warranty Repair Service U S A Non warranty repair covers service beyond the warranty period or service requested due to damage resulting from misuse or abuse Contact Calculated Industries at the number listed above to obtain current product repair information and charges Repairs are guaranteed for 90 days Repair Service Outside U S A To obtain warranty or non warranty repair service for goods purchased out side the U S contact the dealer through which you initia
24. ent Memory can only be changed 1 by pressing EQ resets calculator to default settings or 2 by changing each one or all of these settings The fol lowing are permanent values 1 Selectable 60 C 75 C 90 C insulation ratings and CU AL wire type ratings 2 Phase setting 19 30 3 The entered values for Volts Volt age Drop Power Factor and Efficiency 4 Ambient Temperature setting Semi Permanent Values The following semi permanent values are cleared to default settings when the calculator is shut off 1 Cumulative Memory M 2 Free Air mode 60 ElectriCalc Pro Repair and Return Return Guidelines 1 Please read the Warranty in this User s Guide to determine if your Calculated Industries product remains under warranty before calling or returning any device for evaluation or repairs If your product will not turn on check the battery as outlined in the User s Guide If you need more assistance please go to the website listed below If you believe you need to return your product please call a Calculated Industries representa tive between the hours of 7 00am and 4 00pm Pacific Time for addi tional information and a Return Merchandise Authorization RMA Call Toll Free 1 800 854 8075 Outside USA 1 775 885 4900 www calculated com warranty User s Guide 61 Warranty Repair Service U S A Calculated Industries Cl warrants this product against d
25. ered motor nameplate full load current stored in the registers by 115 or the value you enter 16 ElectriCalc Pro Conforms to NEC Section 430 32 a 1 value of 115 unless you enter another value For example entering 125 would calculate overload protection based on 125 of the entered amperage Displays AMPS ol Second Press Displays the full load current percent multiplier value used to determine the overload current protection size Sub sequent presses of repeat the cycle Displays FLC o iy Starter Size Starter Displays the starter size from NEMA publication ICS 2 1988 Tables 2 327 1 and 2 327 2 based on the phase Volt age and motor Horsepower settings Displays STAR SIZE NOTE Horsepower values not identi fied in NEMA tables will cause the cal culator to round up to the next larger starter size in the table User s Guide 17 Conduit Sizing Keys The ElectriCalc Pro calculates conduit size using NEC Tables 1 3 4 and 5 of Chapter 9 given insulation type wire size and quantity of wires It will also calculate the number of wires of a specified insulation type and wire size that will fit in a defined conduit size Acceptable conduit sizes depending on the type of conduit used are as follows 1 2 3 4 1 1 1 4 1 1 2 2 2 1 2 3 3 1 2 4 5 and 6 Conduit sizes are entered using decimal equiva lents e g 1 1 2 is entered as 1 5 3 4
26. ing Conduit Size Multiple Conductors Different Wire Sizes and Types Three 1 0 THWN 75 C conductors and one 2 XHHW 75 C copper conductor are to connect to a panel board using a single conduit What is the cross sectional area of wires conduit size and actual fill area Note The cross sectional areas are the same for both THHN and THWN display will show as THHN Steps Keystrokes Display Clear calculator 0 Set to 75 set 30 Cu 75 0 Enter cond type Set FMC nonE COND Enter 1st wire sz 0 MIE AWG 0 CU WIRE SIZE Enter type wire THHN 3 WIRES Find cross section wire area THHN 0 5565 WIRE AREA Enter 2nd wire sz 2 MIE AWG 2 CU WIRE SIZE Enter type wire 1 XHHW 1 WIRE Find cross sect XHHW 0 1146 WIRE AREA Find conduit size FMC 1 50 in COND SIZE Cont d User s Guide 55 Cont d Steps Keystrokes Display Find total wires 4 TTL WIRES Find conduit fill FILL 36 1 COND Find actual fill area FILL 0 6711 TTL WIRE AREA Find remaining area REM 0 0717 WIRE AREA Wire size can also be entered in Circular Mils e g 1 0 5 6 0 0 IE enters 105 600 CMILs and displays 0 AWG wire size 6 6 3 6 0 IES enters 66 360 CMILs and displays 2 AWG wire size NOTE See Settings for a list of Permanent Values settings Changing these settings may affect your calculations Converting KW HR and BTU Find the equivalent BTU rating of a 3 5 kw hr rated furnace
27. isplays 2 AWG wire size Given resistance per 1000 Feet divide by 1000 to get a per Foot resist ance then multiply by 85 NOTE See Settings for a list of Permanent Values settings Changing these settings may affect your calculations Finding DC Resistance What is the equivalent resistance of a 12 Volt DC circuit pulling 5 Amps Steps Keystrokes Display Clear calculator 0 Enter Voltage 1 2 E Vde 12 Enter Amps 5 0 Idc 5 Find resistance E9 OHMS 2 4 46 ElectriCalc Pro Ground Conductor Wire Size You can use single or multiple service entrance conductor s to find the grounding electrode conductor for AC systems When using multiple conduc tors the ElectriCalc Pro uses the equivalent Circular Mils to find the grounding electrode conductor based on NEC Table 250 66 Find the grounding electrode conductor wire size required when 2 0 is the larg est 3 phase 75 C copper service entrance conductor being used What is the equivalent aluminum size What is the equivalent Circular Mils Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Set to 75 C Set 30 75 Cu 3 PH Enter wire size 0 G83 AWG00CU WIRE SIZE Find ground wire iim GRND 4 CU size WIRE SIZE Find aluminum size Cig GRND 2 AL WIRE SIZE Find Circular Mils G CMIL 133 100 WIRE Display NEC Table GHJ NEC 250 66 Wire size can also be entered in Circular Mils e g 1 3 3 QD 0 0 ES e
28. ize as determined by Table 1 Chapter 9 Displays COND FILL Fourth Press Shows the total wire area for all entered wires Displays FILL TTL WIRE AREA Cont d User s Guide 19 Cont d Fifth Press Shows remaining fill area This value may be negative if all wires are the same size due to Note 7 in NEC Chap ter 9 Table 1 Displays REM WIRE AREA Set Conduit Type Cond Type First Press Displays the currently selected conduit type Second Press Subsequent presses will display and select the next conduit type from this list EMT ENT FMC IMC LFNB LFNA LFMC RMC P 80 P 40 P A P EB To select a specific conduit type enter the corresponding number of the con duit and then press G3 Gams If you press this keystroke without entering a number the calculator will switch to the next conduit type on the list 20 ElectriCalc Pro CeCe oO Veo Mes 1 k V Preference Settings Your calculator has the following Pref erence Settings that you can access and change at any time Access the Preference Settings by pressing Then to access each category press the key until the desired setting is reached Within each category press the or amp keys to toggle between individual selections note the will advance the amp will back up You can change these settings at any time by repeating the above and set ting in a new preference NOTE T
29. lly purchased the product If you cannot reasonably have the product repaired in your area you may contact Cl to obtain current product repair information and charges including freight and duties User s Guide 63 Disclaimer Cl MAKES NO WARRANTY OR REPRESEN TATION EITHER EXPRESS OR IMPLIED WITH RESPECT TO THE PRODUCT S QUALITY PERFORMANCE MER CHANTABILITY OR FITNESS FOR A PAR TICULAR PURPOSE AS A RESULT THIS PRODUCT INCLUDING BUT NOT LIMITED TO KEYSTROKE PROCEDURES MATHE MATICAL ACCURACY AND PREPRO GRAMMED MATERIAL IS SOLD AS IS AND YOU THE PURCHASER ASSUME THE ENTIRE RISK AS TO ITS QUALITY AND PERFORMANCE IN NO EVENT WILL Cl BE LIABLE FOR DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAM AGES RESULTING FROM ANY DEFECT IN THE PRODUCT OR ITS DOCUMENTATION The warranty disclaimer and remedies set forth above are exclusive and replace all others oral or written expressed or implied No Cl dealer agent or employee is authorized to make any modification extension or addition to this warranty Some states do not allow the exclusion or limitation of implied warranties or lia bility for incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific rights and you may also have other rights which vary from state to state 64 ElectriCalc Pro FCC Class B This equipment has been certified to comply with th
30. nd Press Displays the aluminum grounding conduc tor size Displays EQPG WIRE SIZE AL Third Press Displays the NEC table referenced for the calculation Displays NEC 250 122 User s Guide 13 Fuse Breaker Keys The ElectriCalc Pro has special keys that automatically calculate the Amp ratings of the following over current protection devices Dual Element Fuses Time Delay Single Element Fuses Non Time Delay Instantaneous Trip Breakers Type 1 Inverse Time Breakers Type 2 and Overload Protection Devices These fuse and circuit breaker sizes are derived using the Percent of Full Load Current multipliers listed in NEC Table 430 52 You can also calculate the full Voltage starter size for non plugging and non jogging duty motors based on phase Voltage motor HP and NEMA table specifications If a parameter is missing or invalid the calculator will display nonE Set Motor Type M Type Based on NEC Table 430 52 this key selects the motor type used to define the percent factors for breakers fuses Once set the motor type remains fixed until you change it or perform a Clear All ED C First Press Displays the current motor type Note there is no motor type in single phase mode 14 ElectriCalc Pro Second Press In three phase mode only subsequent presses of will select and display the next motor type from this list SQ C non B Squirrel Cage non Design B SQ
31. negative or from nega tive to positive oo Squares the displayed value Set Square Root yx Square Root function B 0 Cumulative Memory M Adds displayed value to Memory e g M 0 Wo QOGD0 Moe 30 To subtract from Memory you must add a negative value to the cumulative Memory e g 0 00 5 O S cao Ged 0 5 Clears when the calculator is shut off cd 0 Memory Recall Displays the value saved in M cI GQ Display Clear Memory M R C Displays and clears the value saved in M gI Clear Memory Clears the value saved in M without changing displayed value 2 ElectriCalc Pro a 1 9 Memory Storage When pressed after the GM key the 1 through 9 keys will store the displayed values into non cumulative Memory 1 Recall M1 M9 Mode Set up Functions E3 C3 Clear All Clears all values including Memory Resets settings to default values except preference settings which are retained Preferences Prefs Use to set default settings or modes see Preference Settings 1 Single Phase 12 Sets calculator to single phase mode Displays 10 3 Three Phase 30 Sets calculator to three phase mode This is the default setting Displays 30 2 Ambient Temperature AMB 9 Permanently enters ambient tempera ture for determining ampacity derived wire sizes Ambient temperatu
32. nt key also allows you to change percentages to decimals e g 2 5 0 25 User s Guide 23 Memory Operations Whenever the RJ 0 keys are pressed the displayed value will be added to the Memory Other Memory functions FUNCTION KEYSTROKES _ Add to Memory Stor 0 Subtract from Memory Gg 0 Recall total in Memory J 0 Display Clear Memory GD Clear Memory amp a Memory is semi permanent clearing only when you 1 turn off the calculator 4 press Ei amp Clear All When Memory is recalled J 0 consecutive presses of QJ 0 will display the calculated average and total count of the accumulated values UsingM S KEYSTROKES DISPLAY OOL sto 0 M 355 W 2 5 5 GB 0 M 255 W M45 GG G0 M 745 00 CD 0 TTL 135 00 GD 0 AVG 45 M CD 0 CNT 3 M ao a 135 24 ElectriCalc Pro Using Memory Storage Keys M1 M9 In addition to the standard cumulative Memory as previously described your calculator has nine independent Storage Registers M1 through M9 that can be used to permanently store single noncumulative values The following example shows the use of M1 B 1 To use M2 through M9 replace the presses of the 1 key with presses of the corresponding number key 2 through 9 You can replace a value in one of these Memory registers by storing a new value in place of the stored value FUNCTION KEYSTROKES Store single
33. nters 133 100 CMILs and displays 00 AWG wire size User s Guide 47 Equipment Grounding Conductor Wire Size The D GI keystroke can be used to find the grounding conductor size for raceways and over current devices in circuit ahead equipment The calcula tor uses the displayed amperage value to solve for the equipment grounding conductor based on NEC Table 250 122 Find the equipment grounding conduc tor size required when the circuit breaker is rated at 45 Amps and 90 copper is being used in the installation What is the equivalent aluminum size Steps Keystrokes Display Clear calculator 0 Set to 90 C Set EC 30 90 Cu 0 Enter Amp rating 4 5 AMPS 45 Find equipment ground wire size Gy Giz EQPG 10 CU WIRE SIZE Find aluminum size Cig EQPG 8 AL WIRE SIZE Display NEC Table GHJ NEC 250 122 Reset to 60 C 6 30 60 Cu 0 and Clear 48 ElectriCalc Pro Fuse and Circuit Breaker Size What is the calculated dual element and single element fuse size for a 230 Volt 3 phase 50 HP induction motor What are the Instantaneous Trip and Inverse Time Circuit Breaker requirements Steps Keystrokes Display Clear calculator 0 Set to 3 phase Gey 3 PH Enter Volts 2 3 0 VOLT 230 Enter HP 5 0 Gs IND 50 HP Find full current FLC 130 A Find DE fuse size GES AMPS 227 5 dE Display used QE FLC 175 Find SE fuse size Gi AMPS 390 SE Display used GR FLC 300 Find i
34. nv time brkr AMPS 325 b2 Display used FLC 250 Find ins trip breaker size Set AMPS 1 040 b1 Display used FLC 800 What NEMA size starter is required for a 575 volt 30 20 HP induction motor Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Enter Volts 5 7 5 VOLT 575 Enter HP 2 0 Gs IND 20 HP Solve for starter size o Gite STAR 2 SIZE User s Guide 49 Overload Protection Size What overload protection device size is required for a 460 Volt 3 phase 15 HP induction motor with a nameplate current rating of 19 2 Amps and a 1 0 service fac tor What is the required overload rating at 125 for a 1 15 service factor Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Enter Volts 4 6 0 VOLT 460 Enter Horsepower 1 5 A IND 15 HP Enter nameplate current D 9 2 AMPS 19 2 Find overload size AMPS 22 08 ol Display used FLC 115 Find 125 load D 2 5 D AMPS 24 ol Display used FLC 125 Reset overload rating and clear 1 1 5 0 50 ElectriCalc Pro The ElectriCalc Pro can calculate the size of conduit required when running single or multiple wires using the key and the calculator s internal tables The calculator uses NEC values for area of THW THHW XHH XHHW and THHN THWN wires When using the actual wire areas and fol lowing the guidelines in NEC Chapter 9 Tables 1 3 4 and 5 the calculator can calcula
35. o return the Preferences to the default settings perform a full reset press GD hold down A and press Qs or manually set them back using the key strokes below The Preference Settings are default settings shown first To Set 2005 2002 1999 or 1996 NEC code st press of NEC 2005 NEC 1996 NEC 1999 NEC 2002 User s Guide 21 To Set Ambient Temp to C or F 2nd press of AMB 30 C AMB 86 F To Set Length to Feet or Meter 3rd press of BH FEET 1 MET 1 Default Settings When you first receive your calculator it is pre set to the default settings listed below You can always return your calculator to these default values by performing a Clear All C9 Ambient Temperature 30 C Insulation Rating 60 C Material Copper Cu Phase 30 Volts 240 V Efficiency 100 Power Factor 100 Voltage Drop Percent 3 Wire Environment Raceway vs Free Air 22 ElectriCalc Pro Basic Math Operations This calculator uses standard chaining logic which simply means that you enter your first value the operator C3 the second value and then the equals sign amp A 2 o 5 B 2268 1 C aG D 6 D 2 15 Percent Calculations The Percent key QA can be used for find ing a given percentage of a number or for working add on discount or division percentage calculations OGG a DHA 53 25 DG00 O OOSA 266 25 20 288 23 75 DOO e SMA 200 The Perce
36. r Cu 0 Enter Amps 5 0 0 AI AMPS 500 Find 1 wire size Uso AWG 500 CU FrAir WIRE SIZE Find 2 wire size 2 GEIB PAR 000 CU FrAir WIRE SIZE Find 3 wire size Parsz PAR 0 CU FrAir WIRE SIZE Exit Free Air Mode EB 5 30 60 Cu 0 and Clear NOTE Parallel wire sizes smaller than 1 0 will be displayed as nonE NOTE See Settings for a list of Permanent Values settings Changing these settings may affect your calculations 38 ElectriCalc Pro Finding Derated Wire Size What is the derated wire size required for nine 75 C copper wires each carry ing a maximum load of 65 Amps Steps Keystrokes Display Clear calculator 0 Set to 75 C Set 30 75 Cu 0 Enter Amps 6 5 AMPS 65 Find normal wire size Wiresz AWG 6 CU WIRE SIZE Find derated wire size 9 Ge Gm DR 33 GU WIRE SIZE Display Wire Parsz D R 45 5 Ampacity WIRE A Display Adjustment QIB ADJ 70 Factor Display NEC Table GEIS NEC 310 15 NOTE See Settings for a list of Permanent Values settings Changing these settings may affect your calculations User s Guide 39 Sizing Temperature Adjusted Derated Wires A circuit was built with 60 C copper wire connecting a 47 650 Volt amp load to a 240 Volt three phase source Ambient temperature is 50 C What is the derated wire size required if eight current carrying THHN wires were installed in the race way Steps Keystrokes Display Clear calculator 0 Set to
37. re will only change when entering a new value or by resetting the calculator Defaults to 30 C 86 F Amb will display when the ambient temperature is other than 30 C 86 F Displays AMB Cont d User s Guide 3 Cont d NOTE The temperature units can be displayed in Celsius C or Fahrenheit F by using the preference function 4 Copper Aluminum Cu Al Used to toggle between copper de fault and aluminum wire types When the wire type is revised any calculated wire size will be re calculated automati cally If a wire size is entered with the wrong wire type pressing Gi 4 will change the material type without changing the size Displays Al or Cu 5 Free Air FrAir Sets calculator into Free Air mode which refers to NEC Table 310 17 for wire size calculations Displays FrAir 6 60 C Wire Insulation Sets calculator to 60 C wire insulation type for wire size calculations This is the default setting Displays 60 7 75 Wire Insulation Sets calculator to 75 C insulation type for wire size calculations Displays 75 9 90 C Wire Insulation Sets calculator to 90 C insulation type for wire size calculations Displays 90 4 ElectriCalc Pro Electrical Functions Cee kilo This key is used with Watts Amps Volts and Volt amps keys to identify kilo values CL milli This key sequence is used with Watts Amps Volts
38. s The calculator uses the following data to calculate wire size 1 insulation temperature rating 60 C 75 C and 90 C 2 wire material copper or aluminum and 3 ambient temperature Standard AWG wire sizes and Circular Mils are used by the ElectriCalc Pro Wire size entries less than or equal to 2000 are accepted as AWG wire sizes entries greater than 2000 are accepted as Circular Mil entries and display the corresponding AWG wire size Entries must match the standard wire sizes or Circular Mils otherwise nonE will be displayed Invalid entry NOTE 1 0 2 0 3 0 and 4 0 wires are entered using the Q key e g 0 00 000 and 0000 qea Wire Size Ampacity Enters or calculates wire size based on ampacity and Voltage drop if a Voltage drop length has been entered First Press If a wire length has been entered the first press will show the larger of the ampacity or voltage drop derived wire size The calculator will use the larger value when calculations require a wire size If no Voltage drop length has been entered the calculator will display the calculated ampacity rated wire size 8 ElectriCalc Pro Second Press If a wire length has been entered the sec ond press displays the smaller of the two wire sizes If not solving for Voltage drop wire size then displays the maximum ampacity Third Press Displays the wire size in Circular Mils Displays CMIL Fourth Press If a wir
39. te a conduit size based on the con duit type and the same or different wire types and sizes To select a specific conduit type enter the corresponding number of the conduit and then press amp 9 GSEs The numbers and types are 1 EMT 2 ENT 3 FMC 4 IMC 5 LFNB 6 LFNA 7 LFMC 8 RMC 9 P 80 10 P 40 11 P A 12 P EB When you enter a new conduit type or scroll through the types you will see the updated conduit size if you have entered the wire type and quantity User s Guide 51 Finding Motor Branch Circuit Wire Size and Conduit Size Same Wire Type amp Size What size THHN copper wire and RMC conduit are needed to connect a 10 HP 1 induction motor to a 115 Volt source Steps Keystrokes Display Clear calculator 0 Set to i phase B D 1 PH Set to 60 C ea 6 1 60 Cu 1PH Enter Volts DaS VOLT 115 Enter Horsepower 1 0 iim IND 10 HP Enter cond type Set RMC nonE Display full load Amps FLC 100 A Find wire sie 6 Q CS AWG 0 CU WIRE SIZE 125 Find wire ampacity so 0 125 0 WIRE A125 Find conduit size RMC 1 25 in COND SIZE Find total wires 2 TTL WIRES Find conduit fill FILL 24 3 COND Find act fill area FILL 0 3710 TTL WIRE AREA Find rem area REM 0 1021 WIRE AREA Set to 3 phase 30 60 Cu 0 and Clear 52 ElectriCalc Pro If a wire size has been calculated or stored and the wire type quantity is not defined the calculator will assume 2 THHN wires for 10 and 3 TH
40. ttery This should last upwards of 800 hours of actual use One year plus for most peo ple If the display becomes very dim or erratic replace the battery NOTE Please use caution when dis posing of your old batteries as they contain hazardous chemicals 58 ElectriCalc Pro Battery Replacement Instructions 1 Hold calculator upright with back of calculator toward you 2 Lift battery holder out from the top of the calculator 3 Remove the old battery 4 Place new battery with positive side against the bottom of the holder 5 Insert holder into calculator with positive side of battery facing back of calculator A 2005 NEC References Table 250 66 Table 250 122 Table 310 15 b 2 a Table 310 16 Table 310 17 Chapter 9 Table 1 4 5 and 8 Section 430 32 Table 430 148 Table 430 150 Table 430 152 Appendix C National Electrical Code and NEC are registered trademarks of the National Fire Protection Association Inc Quincy MA 02269 All listed table references are based on NEC 2005 Previous code years may have different table references User s Guide 59 Updating Future Code Revisions This model is updateable for future NEC Editions For information on future codes contact the dealer where this calculator was purchased or you may contact Calculated Industries Inc in the fall of the year prior Permanent Values Settings Values and settings maintained in perman
41. ttings Changing these settings may affect your calculations 44 ElectriCalc Pro Finding Voltage Drop Distance How far from a three phase 240 Volt source can you install a 15 Amp load using 60 C 10 copper branch circuit conductors Assume a 3 allowable Voltage drop Steps Keystrokes Display Clear calculator 0 Set to 60 C ED 6 30 60 Cu 0 Enter Amps 1 5 AMPS 15 Enter Volts 2 4 0 VOLT 240 Enter wire size 1 0 UEB AWG 10 Cu WIRE SIZE Enter 3 VD DROP 3 0 V Find distance Length FEET 234 86987 Find actual Voltage drop DROP 7 2 V Find v drop DROP 3 0 V Wire size can also be entered in Circular Mils e g 1 O 3 8 0 MB enters 10 380 CMILs and displays 10 AWG wire size NOTE The calculator automatically makes adjustments for resistance using NEC Chapter 9 Table 8 if the insulation type is other than 75 C See Settings for a list of Permanent Values settings Changing these settings may affect your calculations User s Guide 45 Finding Voltage Drop Resistance What is the resistance of 85 Feet of 2 90 C copper conductor Steps Keystrokes Display Clear calculator 0 Set to 90 C SD 9 30 90 Cu 0 Enter wire size 2 Q AWG 2CU WIRE SIZE Find resistance E GEDOHMS 0 2033993 WIRE Find 85 ft resist D 0 0 0 e 56 0 0172889 Wire size can also be entered in Circular Mils e g 6 6 3 6 0 IES enters 66 360 CMILs and d
42. value in M1 ea D Clear M1 0 a D Recall M1 Rci 1 Examples Store 175 into M1 recall the value and then clear the value KEYSTROKES _ DISPLAY EDITAL Stor ED M 1 175 Off 0 Rei 1 M 1 175 0 ey D M 1 0 User s Guide 25 Kirchhoff s Law The ElectriCalc Pro utilizes Kirchhoff s Law in finding Volts Amps Volt amps Watts Horsepower theoretical efficien cy and power factor Finding Voltage Find the Voltage supply to a single phase load drawing 14 605 Volt amps and 115 Amps Steps Keystrokes Display Clear calculator 0 Set to 1 phase Gg D 1 PH Enter VA 1 4 6 0 5 VA 14 605 Enter Amps DoD 5 GES AMPS 115 Solve for Volts VOLT 127 Finding Amps What is the current Amps for a load drawing 8 250 Volt Amps on a 240 Volt three phase circuit Steps Keystrokes Display Clear calculator 0 Set to 3 phase 3 PH Enter VA 8 2 5 0 QZ VA 8 250 Enter Volts 4 0 VOLT 240 Solve for Amps GEE AMPS 19 846416 26 ElectriCalc Pro Finding Current Load A building with 120 240 Volt 19 service has the following loads Range 7 800 VA Heating 15 100 VA Dryer 5 100 VA Appliances 8 900 VA Lighting 6 470 VA What is the service load Amps of the circuit supplying this building Steps Keystrokes Display Clear calculator 0 Set to 1 phase B D 1 PH Add VA loads Nsoog YSIVDOO HVOOG 8 9 0 0 6 4 7 0 amp 43 370 Enter

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