Preset for 480 V three-phase — industrial feeders, large motors and distribution. A 3% budget at this voltage is 14.4 V.
| Size \ Amps | 15 A | 20 A | 30 A | 50 A | 100 A |
|---|---|---|---|---|---|
| 14 AWG | 181 | 135 | — | — | — |
| 12 AWG | 287 | 215 | — | — | — |
| 10 AWG | 458 | 344 | 229 | — | — |
| 8 AWG | 725 | 544 | 363 | 218 | — |
| 6 AWG | 1129 | 847 | 564 | 339 | — |
| 4 AWG | 1800 | 1350 | 900 | 540 | — |
| 3 AWG | 2262 | 1697 | 1131 | 679 | 339 |
| 2 AWG | 2857 | 2143 | 1428 | 857 | 429 |
| 1 AWG | 3599 | 2699 | 1800 | 1080 | 540 |
| 1/0 AWG | 4543 | 3407 | 2272 | 1363 | 681 |
| 2/0 AWG | 5732 | 4299 | 2866 | 1720 | 860 |
| 3/0 AWG | 7236 | 5427 | 3618 | 2171 | 1085 |
| 4/0 AWG | 9116 | 6837 | 4558 | 2735 | 1367 |
Three-phase distances benefit from the √3 factor — about 15% farther than single-phase at the same line-to-line voltage and current.
14.4 V — the recommended maximum branch-circuit drop at this voltage. The 5% total budget is 24.0 V.