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Per the NEC, what are the standard ampere ratings of fixed-trip circuit breakers (600Vac maximum)?
Issue:
Where do circuit breaker amp ratings come from?
Product Line:
Circuit Breakers
Resolution:
Per NEC 240.6, the standard ampere rating for inverse time, fixed-trip circuit breakers, 600Vac maximum, shall be considered as follows:
The use of inverse time circuit breakers with nonstandard ampere ratings shall be permitted.
Where do circuit breaker amp ratings come from?
Product Line:
Circuit Breakers
Resolution:
Per NEC 240.6, the standard ampere rating for inverse time, fixed-trip circuit breakers, 600Vac maximum, shall be considered as follows:
| 15 | 20 | 25 | 30 | 35 | 40 | 45 |
| 50 | 60 | 70 | 80 | 90 | 100 | 110 |
| 125 | 150 | 175 | 200 | 225 | 250 | 300 |
| 350 | 400 | 450 | 500 | 600 | 700 | 800 |
| 1000 | 1200 | 1600 | 2000 | 2500 | 3000 | 4000 |
| 5000 | 6000 |
The use of inverse time circuit breakers with nonstandard ampere ratings shall be permitted.
Released for:Schneider Electric USA
