Wire Sizes & Amp Ratings
| Copper AWG | NM & UF 30° C (86°F) |
THHN, Use-2, XHW-2 & SEU 90°C Copper |
| 14-Gauge | 15 amps |
15 amps |
| 12-Gauge | 20 amps | 20 amps |
| 10-Gauge | 30 amps | 30 amps |
| 8-Gauge | 40 amps | 55 amps |
| 6-Gauge | 55 amps | 75 amps |
| 4-Gauge | 70 amps | 95 amps |
| 2-Gauge | 95 amps | 130 amps |
| 1/0 | - | 170 amps |
| 2/0 | - | 195 amps |
| 3/0 | - | 225 amps |
| 4/0 | - | 260 amps |
Warning: All wire must be protected accoding to amp ratings. Installation of electrical wire can be hazardous. The above information is general in application. Consult a professional engineer for special conditions. Always consult the National Electrical code and your local building/electrical inspector.