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 |
1ø |
3ø |
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 |