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20 — ElectriCalc LT

Finding Current Load

A building with 120/240 volt 1Ø service
has the following loads:

Range = 7,800 VA
Heating = 15,100 VA
Dryer = 5,100 VA
Fixed Appliances = 8,900 VA
General Lighting = 6,470 VA

What is the service load (amps) of the
circuit supplying this building?

Steps Keystrokes Display

Clear 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

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Содержание ElectriCalc LT

Страница 1: ...ElectriCalc LT An Electrician s Utility for Wiring User s Guide...

Страница 2: ...cially those unfamiliar with the Code should exercise appropriate caution If questions arise as to the correctness of an answer given by the calculator or if an answer appears to conflict with the Co...

Страница 3: ...1999 National Electrical Code allowing you to solve Code related problems quickly and accurately Common NEC tables are built in providing instant solutions for the following Volts Amps Volt Amps Watts...

Страница 4: ...3 Default Settings 16 Basic Math Operations 17 Percent Calculations 17 Memory Functions 18 Kerchoff s Law 19 Ampacity Wire Sizing 24 Voltage Drop 31 Error Codes 39 1999 NEC References 39 Battery Infor...

Страница 5: ...ll power off Clears the memory and most internal registers Set Second Function Accesses the secondary functions shown above the keys when pressed prior to selection Rcl Recall Recalls a value stored i...

Страница 6: ...e displayed value from Memory x Arithmetic operation keys Set Change Sign Toggles the sign of the displayed value from positive to negative or from nega tive to positive Set Reciprocal 1 x Reciprocal...

Страница 7: ...s entered with the wrong wire type pressing CU AL will change the material type without changing the size Displays Al or Cu Set 1 Single Phase 1 Sets calculator to single phase mode Displays 1 Set 3 T...

Страница 8: ...lator Set x Defaults to 30 C 86 F Amb will dis play when the ambient temperature is other than 30 C 86 F Displays Amb Set 4 Feet Meters Toggle Toggles between feet and meters Displays FEET or MET Set...

Страница 9: ...entify milli values Amps Amps Enters or calculates amps using volts and VA or watts Displays AMPS KAMP Volts Volts Enters or calculates volts using amps HPth and VA or watts Default value is 240 volts...

Страница 10: ...PF HPth Horsepower Theoretical Enters or calculates theoretical horse power based on Amps VA watts effi ciency PF and or volts 1 0 HPth correlates to 746 watts at 100 effi ciency Displays HPth NOTE Th...

Страница 11: ...the ElectriCalc LT NOTE 1 0 2 0 3 0 and 4 0 wires are entered using the 0 key i e 0 00 000 and 0000 WireSz Wire Size Ampacity Enters or calculates wire size based on ampacity and voltage drop if a vo...

Страница 12: ...erates same as WireSz except that a factor of 125 is applied to the am perage ParSz Parallel Size Used to find the size of parallel con ductors using amperage and an entered quantity of wires Parallel...

Страница 13: ...sed 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 4 wires or when the unit is in Free Air mode First Press...

Страница 14: ...AC circuit values as factors such as inductive reactance skin effect raceway material etc are not considered VD Percent Voltage Drop Used to enter or calculate voltage drop The default voltage drop is...

Страница 15: ...r calculates the maximum length of run for voltage drop computa tion Displays FEET or MET Set Length Wire Resistance Displays the wire resistance per 1 000 feet of the wire size in WireSz based on NEC...

Страница 16: ...largest size Only actual wire sizes are consid ered valid entries First Press Calculates the copper grounding elec trode conductor size if you have entered a valid wire size Displays GRND CU WIRE SIZE...

Страница 17: ...mp values of 4001 or more The AL conductor sizes given in the Table 1200 MCM AL are not among those listed in Table 310 16 17 which is the table the calculator uses to calculate wire size In these cas...

Страница 18: ...ettings listed below You can always return your cal culator 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 Effic...

Страница 19: ...d 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 20: ...isplay clear memory Rcl Rcl Clear memory no display Set Rcl Replace memory with displayed value Set Rcl M The memory is semi permanent it will be cleared when you 1 turn off the calculator 2 press Rcl...

Страница 21: ...ps Steps Keystrokes Display Clear calculator On C On C 0 Set to 1 phase Set 1 1 PH Enter volt amps 14605 VA 14 605 VA Enter amps 115 Amps 115 AMPS Solve for volts Volts 127 VOLT Finding Amps What is t...

Страница 22: ...VA Fixed Appliances 8 900 VA General Lighting 6 470 VA What is the service load amps of the circuit supplying this building Steps Keystrokes Display Clear calculator On C On C 0 Set to 1 phase Set 1...

Страница 23: ...PH Enter kilowatts 75 kilo Watts 75 KW Enter volts 208 Volts 208 VOLT Solve for amps Amps 208 17918 AMPS Finding Volt Amps What is the VA rating for a 120 volt 22 amp 1 circuit What is the kVA rat ing...

Страница 24: ...08 VOLT Enter amps 65 Amps 65 AMPS Solve for kVA kilo VA 23 417327 KVA Finding Wattage A 120 volt single phase 45 amp electri cal motor has an 87 power factor What is its wattage Steps Keystrokes Disp...

Страница 25: ...p 208 volt three phase broiler with 100 power factor Steps Keystrokes Display Clear calculator On C On C 0 Set to 3 phase Set 3 3 PH Set power factor 100 Set Watts 100 PF Enter amps 90 Amps 90 AMPS En...

Страница 26: ...es 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...

Страница 27: ...a 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 Reset calculator Set x 0 Set to 75 C Set 7 3 75 Cu 0 Enter amps 26...

Страница 28: ...um CU AL 1 90 Al 1 PH Enter volt amps 47700 VA 47 700 VA Enter volts 240 Volts 240 VOLT Find amps Amps 198 75 AMPS Find wire size WireSz 0000 AL AWG WIRE SIZE What is the adjusted wire size if the amb...

Страница 29: ...C copper wire carrying a 3 load of 265 amps What is the equivalent aluminum wire size Steps Keystrokes Display Reset calculator Set x 0 Set to 75 C Set 7 3 75 Cu 0 Enter amps 265 Amps 265 AMPS Find w...

Страница 30: ...mp What size for 2 parallel conductors For 3 conduc tors Steps Keystrokes Display Reset calculator Set x 0 Set free air mode Set 5 3 60 FrAir Cu 0 Enter amps 500 Amps 500 AMPS Find 1 wire size WireSz...

Страница 31: ...ed for nine 75 C copper wires each carry ing a maximum load of 65 amps Steps Keystrokes Display Reset calculator Set x 0 Set to 75 C Set 7 3 75 Cu 0 Enter amps 65 Amps 65 AMPS Find normal wire size Wi...

Страница 32: ...aceway Steps Keystrokes Display Reset calculator Set x 0 Set to 1 phase Set 1 1 PH Set to 90 C Set 9 1 90 Cu 1 PH Toggle to alum CU AL 1 90 Al 1 PH Enter volt amps 47650 VA 47 650 VA Enter volts 240 V...

Страница 33: ...ve 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 volt...

Страница 34: ...entered last the calculator will re calculate the wire size to match the 99 NEC Ampacity Table requirements Finding Single Phase Voltage Drop You are installing 175 feet of 75 C 8 THW branch circuit c...

Страница 35: ...olt 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 Reset calculator...

Страница 36: ...of 75 C con ductor required for this branch circuit Steps Keystrokes Display Reset calculator Set x 0 Set to 75 C Set 7 3 75 Cu 0 Set to single ph Set 1 1 PH Enter amps 20 Amps 20 AMPS Enter volts 208...

Страница 37: ...or Set x 0 Set to single ph Set 1 1 PH Set to aluminum CU AL 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 DROP...

Страница 38: ...RE 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 Findin...

Страница 39: ...sed 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 siz...

Страница 40: ...the equipment grounding con ductor 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 ins...

Страница 41: ...rge to fit display 2 Invalid or out of scale entry 3 PF or EFF calculated above 100 5 Unable to calculate VDWire Size Amps Length too high 9 Entered or calculated more than 15 dif ferent wires sizes 1...

Страница 42: ...osing of your old batteries as they contain hazardous chemicals Settings Permanent Values Settings Values and settings maintained in per manent memory can only be changed 1 by pressing Set x resets ca...

Страница 43: ...ar from the date of original consumer purchase in the U S If a defect exists during the warranty period CII at its option will either repair using new or remanufactured parts or replace with a new or...

Страница 44: ...If the product is over 90 days old include payment of 6 95 for return shipping and handling within the con tiguous 48 states Outside the contigu ous 48 states please call CII for return shipping cost...

Страница 45: ...you cannot rea sonably have the product repaired in your area you may contact CII to obtain current product repair information and charges including freight and duties Disclaimer CII MAKES NO WARRANT...

Страница 46: ...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 liability for incidental or consequ...

Страница 47: ...Guide is copyrighted by Calcu lated Industries Inc 1999 ElectriCalc LT and Calculated Industries are registered trademarks of Calculated Industries Inc ALL RIGHTS RESERVED Calculated Industries Inc 4...

Страница 48: ...Designed in the United States of America Printed in Indonesia 5025 MN V1 0...

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