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Water Heater Circuit Breaker Size

Mike Lamb

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  • 3 weeks later...
1 hour ago, Marc said:

Why? Assuming the OCP device is sized to protect the circuit conductors.

The NEC states that the OCD is "not to exceed" 150% of the rated current. 422.11(E)(3) At 208 volts, that current would be 24.4 amps. The next standard size breaker is 25, which is the only one allowed in this scenario.

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