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Is a fifteen Amp circuit breaker on a one hundred Amp panel actually de-rated to allow only twelve Amps? |
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Answer
when adding up loads for sizing other conductors such as mains and main breakers, you assume each receptacle circuit is loaded at 80% of circuit ampacity. for a 15 amp circuit, 80% is 12 amps. but you can use all the ampacity you want til you start tripping breakers. if you know ahead of time in designing an electrical service that 80% isn't a good assumption, then by all means, make it bigger.
First answer by Zeumer. Last edit by Zeumer. Contributor trust: 227 [recommend contributor]. Question popularity: 131 [recommend question]
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