| Rating or setting of Automatic Overcurrent Device (OCPD) in Circuit ahead of Equipment [i.e Circuit Breaker]. Not exceeding (Amps) |
Size (AWG or kcmil) |
|
| Copper | Aluminum or Copper-Clad Aluminum | |
| 15 | 14 | 12 |
| 20 | 12 | 10 |
| 30 | 10 | 8 |
| 40 | 10 | 8 |
| 60 | 10 | 8 |
|
100 |
8 |
6 |
|
200 |
6 |
4 |
|
300 |
4 |
2 |
|
400 |
3 |
1 |
|
500 |
2 |
1/0 |
|
600 |
1 |
2/0 |
|
800 |
1/0 |
3/0 |
|
1000 |
2/0 |
4/0 |
|
1200 |
3/0 |
250 kcmil |
|
1600 |
4/0 |
350 kcmil |
|
2000 |
250 kcmil |
400 kcmil |