Table 250.122 Minimum Size Equipment Grounding Conductors for Grounding Raceway and
Equipment
| Rating or Setting of Automatic Overcurrent Device in Circuit Ahead
of Equipment, Conduit, etc., Not Exceeding (Amperes)
|
Size (AWG/kcmil) |
| Copper |
Aluminum or Copper-Clad Aluminum |
| 15 |
14 |
12 |
| 20 |
12 |
10 |
| 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 |
| 1600 |
4/0 |
350 |
| 2000 |
250 |
400 |
| 2500 |
350 |
600 |
| 3000 |
400 |
600 |
| 4000 |
500 |
750 |
| 5000 |
700 |
1250 |
| 6000 |
800 |
1250 |