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NEC 125% Rule

The National Electrical Code requires overcurrent protective devices for branch circuits to be sized so they can carry the noncontinuous load plus 125% of any continuous load.

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Jan 27, 2026
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What does the National Electrical Code specify for sizing breakers on continuous 120V loads?

The requires for to be sized so they can carry the noncontinuous load plus 125% of any continuous load, where “continuous” means currents expected to run for three hours or more (Art. 100 and 210.20(A...