Circuit breakers providing short circuit protection for trailing cables shall be set so as not to exceed the maximum allowable instantaneous settings specified in this section; however, higher settings may be permitted by an authorized representative of the Secretary when he has determined that special applications are justified:
Conductor size AWG or MGM
| Maximum allowable circuit breaker instantaneous setting (amperes)
|
---|
14 | 50
|
12 | 75
|
10 | 150
|
8 | 200
|
6 | 300
|
4 | 500
|
3 | 600
|
2 | 800
|
1 | 1,000
|
1/0 | 1,250
|
2/0 | 1,500
|
3/0 | 2,000
|
4/0 | 2,500
|
250 | 2,500
|
300 | 2,500
|
350 | 2,500
|
400 | 2,500
|
450 | 2,500
|
500 | 2,500 |