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44 — ElectriCalc Pro

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
conduc-tor. What is the voltage drop on
this branch circuit?

Steps

Keystrokes

Display

Reset calculator

[Set] [x] [On/C]

0.

Set to 75°C

[Set] [7]

3Ø 75 Cu  0.

Enter amps

20 [Amps]

20. AMPS

Enter volts

230 [Volts]

230. VOLT

Enter length(feet)

150 [Length]

150. FEET

Enter VD wire size10 [WireSz] 

10 CU

AWG WIRE SIZE

Solve volt. drop

[VD%]

6.4 DROP V

Solve % v.drop

[VD%]

2.8 DROP V %

5060-UG-B-Composite  4/4/03  12:37 PM  Page 46

Содержание ElectriCalc Pro 5060

Страница 1: ...milli EqGrnd D R Size InsTrip SEFuse Starter Cond Type M Type 125 PF Eff 90 75 Ind Sync 1 3 Amb Cu Al 60 FrAir Prefs ___ x x2 2 8 3 0 4 5 6 7 9 1 On C Off Volts VA Amps Watts ParSz Length Rcl Stor Wir...

Страница 2: ......

Страница 3: ...ly labeled electrical keys and conforms to the 2002 and future National Electrical Codes allow ing you to solve Code related problems quickly and accurately The most com mon NEC tables are now at your...

Страница 4: ...A kW PF EFF and DC Resistance Copper or Aluminum Wire Sizes Parallel Derated Wire Sizes Voltage Drop Wire Sizes and Actual Voltage Drops Voltage Drop Distances and Wire Resis tances Grounding Conducto...

Страница 5: ...ns 29 Kerchoff s Law 30 Motor Horsepower 34 Ampacity Wire Sizing 36 Voltage Drop 42 Ground Conductor Wire Size 48 Equip Grounding Conductor Wire Size 49 Fuse and Circuit Breaker Size 50 Starter Size 5...

Страница 6: ...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 the bat tery l...

Страница 7: ...ay Pressing twice clears all non permanent values Off Off Turns all power off Clears the memory and most internal registers x Arithmetic operation keys 0 9 Used for keying in numbers Percent Four func...

Страница 8: ...before a storage register i e M AMPS VOLTAGE etc Displays STOR Rcl Recall Recalls a value stored in a register e g to recall voltage drop press Rcl VD Displays RCL Set Pi Constant 3 141593 Set Change...

Страница 9: ...splay Clear Memory Displays and clears the value saved in M Set Rcl Clear Memory Clears the value saved in M without changing displayed value Mode Set up Functions Set x All Clear AC Resets all settin...

Страница 10: ...86 F Amb will display when the ambient temperature is other than 30 C 86 F Displays Amb NOTE The temperature units can be displayed in Celsius C or Fahrenheit F by using the preference function Set S...

Страница 11: ...fault setting Displays 60 Set 7 75 C Wire Insulation Sets calculator to 75 C insulation type for wire size calculations Displays 75 Set 9 90 C Wire Insulation Sets calculator to 90 C insulation type f...

Страница 12: ...alculates and displays DC resistance Displays OHMS VA Volt Amps Enters or calculates volt amps using amps volts and horsepower or watts Displays VA KVA or mVA Watts Watts Enters or calculates watts us...

Страница 13: ...retical horsepower Default 100 Entered or calculated efficiencies greater than 100 will result in an er ror Displays EFF Motor Horsepower Functions The ElectriCalc Pro can be used to determine motor f...

Страница 14: ...Table 310 16 310 17 for Free Air to find wire sizes and ampacity ratings of wires The calculator uses the following data to calculate wire size 1 insulation temperature rating 60 C 75 C and 90 C 2 wir...

Страница 15: ...ampacity rated wire size Second Press If a wire length has been entered the second press displays the smaller of the two wire sizes If not solving for voltage drop wire size then displays the maximum...

Страница 16: ...alcu lates the applicable wire size for that quantity of wires in parallel Displays PAR WIRE SIZE Second Press Displays the maximum adjusted am pacity of the calculated parallel wire size Displays WIR...

Страница 17: ...djustment factor per the NEC Table 310 15 b 2 a Displays ADJ Voltage Drop Solutions The ElectriCalc Pro will calculate maximum lengths minimum wire sizes or actual voltage drops given the other two va...

Страница 18: ...tage Displays V DROP or calculates actual voltage drop Displays V DROP Second Press Calculates actual percent voltage drop Displays V DROP Length Length Enters or calculates the length of a run for vo...

Страница 19: ...argest 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...

Страница 20: ...ing for a over current device up line i e 300 Set Grnd 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...

Страница 21: ...ker sizes are derived using the Percent of Full Load Current multipliers listed in NEC Table 430 152 You can also calculate the full voltage starter size for non plugging and non jogging duty motors b...

Страница 22: ...el Cage non Design E SQ C E Squirrel Cage Design E SYNC no codE Synchro nous WND no codE Wound Rotor DEFuse Dual Element Fuse First Press Calculates the minimum amp rating for a Dual Element Fuse Disp...

Страница 23: ...us 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 Inv...

Страница 24: ...d 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 protec...

Страница 25: ...t 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 i e 1 1 2 is entered as 1 5 3 4 is entered as 75 etc THW XHHW THHN Number of...

Страница 26: ...l as sume 2 THHN wires for single phase or 3 THHN wires for three phase calcula tions First Press Enters or calculates conduit size Displays COND SIZE NOTE If a wire size has not been en tered or calc...

Страница 27: ...7 in NEC Chap ter 9 Table 1 Displays REM WIRE AREA Set CondSz Conduit Type First Press Displays the currently selected conduit type Second Press Subsequent presses will display and select the next co...

Страница 28: ...gle between individual selections note the will advance the will back up You can change these settings at any time by repeating the above and set ting in a new preference NOTE To clear preferences you...

Страница 29: ...ttings listed below You can always return your calculator to these default values with an All Clear Set x Ambient Temperature 30 C Insulation Rating 60 C Material Copper Cu Phase 3 Volts 240 V Efficie...

Страница 30: ...nd value and then the equals sign A 3 2 5 B 3 2 1 C 3 x 2 6 D 3 2 1 5 Percent Calculations The percent key can be used for finding a given percentage of a number or for working add on discount or divi...

Страница 31: ...ear memory Rcl Rcl Clear memory no display Set Rcl Replace memory with displayed value Set Rcl Stor 0 The memory is semi permanent it will be cleared when you 1 turn off the calculator 2 press Rcl Rcl...

Страница 32: ...d 115 amps Steps Keystrokes Display Clear calculator On C On C 0 Set to 1 phase Set 1 1 PH Enter VA 14605 VA 14 605 VA Enter amps 115 Amps 115 AMPS Solve for volts Volts 127 VOLT Finding Amps What is...

Страница 33: ...lear calculator On C On C 0 Set to 1 phase Set 1 1 PH Add VA loads 7 800 15 100 5 100 8 900 6 470 43 370 Enter as VA VA 43 370 VA Enter volts 240 Volts 240 VOLT Solve for amps Amps 180 70833 AMPS Find...

Страница 34: ...1 phase Set 1 1 PH Enter volts 120 Volts 120 VOLT Enter amps 22 Amps 22 AMPS Solve volt amps VA 2 640 VA Solve for kVA kilo VA 2 64 KVA Finding kVA Rating What is the kVA rating for a 120 208 volt thr...

Страница 35: ...lts 120 VOLT Set power fact 87 Set Watts 87 PF Enter amps 45 Amps 45 AMPS Solve for watts Watts 4 698 WATT Finding kW Rating What s the kW rating for a 90 amp 208 volt three phase broiler with 100 pow...

Страница 36: ...value for HP or voltage that does not correspond to these tables the unit will display Error 8 The ElectriCalc Pro can also calculate an equivalent horsepower for either an induction or a synchronous...

Страница 37: ...ind full load amps Amps 12 FLC A Finding Motor Wire Size and Ampacity Find the wire size required to connect a continuous run 3 3 HP induction motor into a 230V circuit Steps Keystrokes Display Reset...

Страница 38: ...lts 240 VOLT Enter amps 27 Amps 27 AMPS Solve for Hp HPmotor 25 HP SYNC Ampacity Wire Sizing The required wire size of a service conductor can be determined based on the specified electrical requireme...

Страница 39: ...A 30 kilo VA 30 KVA Enter volts 240 Volts 240 VOLT Find amps Amps 125 AMPS Find CU wire size WireSz 0 CU AWG WIRE SIZE Re sizing Wire Based on Different Insulation Ratings What wire size is required f...

Страница 40: ...rokes Display Clear calculator On C On C 0 Set to 1 phase Set 1 1 PH Set to 90 C Set 9 1 90 Cu 1 PH Set toAl Set 4 1 90 Al 1 PH Enter VA 47700 VA 47 700 VA Enter volts 240 Volts 240 VOLT Find amps Amp...

Страница 41: ...Reset calculator Set x On C 0 Set to 75 C Set 7 3 75 Cu 0 Enter amps 265 Amps 265 AMPS Find wire size WireSz 300 CU AWG WIRE SIZE Change to alum Set 4 400 AL AWG WIRE SIZE Sizing Parallel Conductors W...

Страница 42: ...ire size 3 ParSz 0 CU PAR WIRE SIZE NOTE Parallel wire sizes smaller than 1 0 will be displayed as nonE Finding Derated Wire Size What is the derated wire size required for nine 75 C copper wires each...

Страница 43: ...way Steps Keystrokes Display Reset calculator On C 0 Set to 1 phase Set 1 1 PH Set to 90 C Set 9 1 90 Cu 1 PH Toggle to alum Set 4 1 90 Al 1 PH Enter volt amps 47650 VA 47 650 VA Enter volts 240 Volts...

Страница 44: ...ave entered or calculated the phase volts amps length wire type and allowable VD percentage It will solve for the distance Length once you have entered or calculated the phase volts amps wire type vol...

Страница 45: ...late the wire sizes based on the 99 NEC Ampacity Tables and maximum allowable voltage drop Finding Single Phase Voltage Drop You are installing 175 feet of 75 C 8 THW branch circuit copper conductors...

Страница 46: ...e 75 C 10 THW stranded copper conduc tor What is the voltage drop on this branch circuit Steps Keystrokes Display Reset calculator Set x On C 0 Set to 75 C Set 7 3 75 Cu 0 Enter amps 20 Amps 20 AMPS E...

Страница 47: ...75 C con ductor re quired for this branch circuit Steps Keystrokes Display Reset calculator On C 0 Set to 75 C Set 7 3 75 Cu 0 Set to 1 phase Set 1 1 PH Enter amps 20 Amps 20 AMPS Enter volts 208 Volt...

Страница 48: ...et x On C 0 Set to 1 phase Set 1 1 PH Set to aluminum Set 4 1 60 Al 1 PH Enter amps 15 Amps 15 AMPS Enter volts 240 Volts 240 VOLT Enter wire size 10 WireSz 10 AL AWG WIRE SIZE Enter 3 VD 3 VD 3 0 DRO...

Страница 49: ...WIRE SIZE Find resistance Set Length 0 2033993 OHMS WIRE Find 85 ft resist 1000 x 85 0 0172889 NOTE Given resistance per 1000 feet divide by 1000 to get a per foot resis tance then multiply by 85 Find...

Страница 50: ...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 s...

Страница 51: ...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 insta...

Страница 52: ...ents Steps Keystrokes Display Reset calculator On C 0 Enter volts 230 Volts 230 VOLT Enter hp 50 HPmotor 50 HP IND Find full current Amps 130 FLC A Find DE fuse size DEFuse 227 5 dE AMPS Display used...

Страница 53: ...n device size is required for a 460 volt 3 phase 15 HP induction motor with a nameplate cur rent rating of 19 2 amps and a 1 0 ser vice factor What is the required over load rating at 125 for a 1 15 s...

Страница 54: ...es in NEC Chapter 9 Tables 1 3 4 and 5 the calculator can calculate a con duit size based on the conduit type and the same or different wire types and sizes To select a specific conduit type enter the...

Страница 55: ...r horsepower 10 HPmotor 10 HP IND Enter cond type 8 Set CondSz nonE RMC Display full load amps Amps 100 FLC A Find wire size Set WireSz 0 CU AWG WIRE SIZE 125 Find wire ampacity WireSz 0 125 0 WIRE A1...

Страница 56: ...when calculating conduit size Finding Conduit Sizes for Multi ple Conductors Same Wire Type Size Find the minimum IMC conduit size for eleven 6 THHN copper wires Steps Keystrokes Display Clear calcul...

Страница 57: ...C On C 0 Enter cond type 1 Set CondSz EMT nonE COND Enter wire size 10 WireSz 10 CU AWG WIRE SIZE Enter conduit size 3 CondSz 3 00 in EMT COND SIZE Find max THHN THHN 167 THHN TTL WIRES Find max XHHW...

Страница 58: ...wire sz 0 WireSz 0 CU AWG WIRE SIZE Enter type wire 3 THHN 3 THHN WIRES Find cross sect wire area THHN 0 5565 THHN WIRE AREA Enter 2nd wire sz 2 WireSz 2 CU AWG WIRE SIZE Enter type wire 1 XHHW 1 XHH...

Страница 59: ...alculate VDWire Size Amps Length too high 8 Invalid HP entry per NEC table 9 Entered or calculated more than 15 different wires sizes 11 Temperature setting out of range for wire computation Battery I...

Страница 60: ...4 5 and 8 Section 430 32 Table 430 148 Table 430 150 Table 430 152 Appendix C Updating Future Code Revisions This model is updateable for future NEC Editions For information on 2005 and 2008 Codes co...

Страница 61: ...ach one or all of these settings The following are permanent values 1 Selectable 60 C 75 C 90 C insula tion ratings and CU AL wire type rat ings 2 Phase setting 1 3 3 The entered values for volts volt...

Страница 62: ...remanufactured unit the product at no charge THE WARRANTY WILL NOT APPLY TO THE PRODUCT IF IT HAS BEEN DAM AGED BY MISUSE ALTERA TION ACCIDENT IMPROPER HAN DLING OR OPERATION OR IF UN AUTHORIZED REPAI...

Страница 63: ...48 states please call CI for return shipping costs A repaired or replacement product assumes the remaining warranty of the original product or 90 days whichever is longer Non Warranty Repair Service U...

Страница 64: ...rea you may contact CI to obtain current product repair information and charges including freight and duties Disclaimer CI MAKES NO WARRANTY OR REP RESENTATION EITHER EXPRESS OR IMPLIED WITH RESPECT T...

Страница 65: ...any modification extension or addition to this warranty Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages so the above lim...

Страница 66: ...r s Guide is copyrighted by Calcu lated Industries Inc 2002 ElectriCalc and Calculated Industries are registered trademarks of Calculated Industries Inc ALL RIGHTS RESERVED Calculated Industries Inc 4...

Страница 67: ......

Страница 68: ...Printed in China 5060 UG B 2 02...

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