How To Calculate Voltage Drop


Use the following formula as a guide for calculating voltage drop.

Volts Drop = FACTOR x AMPS x FEET
100

Copper Conductor - 90% Power Factor

AWG
14 .4762 .4167
12 .3125 .2632
10 .1961 .1677
8 .1250 .1087
6 .0833 .0714
4 .0538 .0463
3 .0431 .0379
2 .0323 .0278
1 .0323 .0278
0 .0269 .0231
00 .0222 .0196
000 .0190 .0163
0000 .0161 .0139
250 .0147 .0128
300 .0131 .0114
350 .0121 .0106
400 .0115 .0091
500 .0101 .0088