['Specialized Industries']

['Mining']

07/19/2025

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§75.601-1 Short circuit protection; ratings and settings of circuit breakers.

...

§75.601-1 Short circuit protection; ratings and settings of circuit breakers.

RegSense CFR Regulations Mining Specialized Industries CFR Section English Focus Area USA

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

['Specialized Industries']

['Mining']

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