voltage drop calculator (1)
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8/16/2019 Voltage Drop Calculator (1)
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Voltage Drop Calculator
AWG Cmils
415 Volts 18 1620
50 Amperes 16 2580
100 Distance (Feet) 14 411026240 Cmils 12 6530
10 10380
8 16510
1.0% Percent Voltage Drop, CU, 3 Phase 6 26240
4.2 Volts Dropped, CU, 3 Phase 4 4140
3 52620
1.7% Percent Voltage Drop, A, 3 Phase 2 66360
.0 Volts Dropped, A!, 3 Phase 1 836"0
1#$ 105600
1.!% Percent Voltage Drop, CU, "ingle Phase 2#$ 133100
4.8 Volts Dropped, CU, %i&'le Phase 3#$ 16800
4#$ 2116001.#% Percent Voltage Drop, A, "ingle Phase 250 250000
8.1 Volts Dropped, A!, %i&'le Phase 400 400000
500 500000
K=12.6 for CU and K=21.2 for AL
1.73 X I X L X K / Cmils = VD 3 Phase
2 X I X L X K / Cmils = VD in!le Phase
" VD / # $ % 1&& = 'VD
Electric West Inc.
1(17 #ner!) *.
P+ ,o% -3-ille**e 0 2717&-3-
"3&7$ 666(66 +ffi4e
"3&7$ 626615 a%
Desi!ned ) Lorn 8a4Ilra9ie
Commen*s or 4orre4*ions are :el4ome;
lornla*or is ased on *he informa*ion in U!l)?s #le4*ri4al @eferen4es.
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8/16/2019 Voltage Drop Calculator (1)
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How to use this Excel Spreadsheet:
1- Put the input data which are:
Voltage in Volts,
Load Current in Amps,Distance in Feets,
Cable Cross section Area in Cmils.
- !et Voltage drop "V D# in V $rom the $ollowing Formula:
Voltage drop "V D# % Phase & 1.'% ( ) ( L ( * + CmilsVoltage drop "V D# ingle Phase & ( ) ( L ( * + Cmils
here *&1. $or C/ and *&1. $or AL
%- !et Voltage drop "V D# in percent $rom the $ollowing Formula:
Copper and % phase,
Aluminum and % phase,
Copper and single phase,
Aluminum and single phase.
Note: i$ ou ha2e the Cable Cross section Area in A!+*cmil use the shown table to get the e3ui2alentCmils.
"V D# 4 & Voltage drop "V D# in V 5 166 + Voltage
7- From the 8esults section, select the 8esult that match with the actual method o$ installation $rom the$ollowing choices:
9- )$ the "V D 4# the predetermined Value according to Countr 8egulations ".9 4 or %4#, change the CaCross section Area in Cmils with a higher si;e.