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Is there a safety concern or code requirement around mixing circuits from different phases (on different buses) in a single box? I want to pair 2 switches into a 2-gang box where the switches are on different circuits and the circuit breakers are on opposite buses.

T.J.L.
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Allan Burge
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1 Answers1

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NEC 404.8(B) requires identified, securely installed barriers where voltages between snap switches exceed 300v, which is an issue with 277/480v systems, but not 120/240v or 120/208v.

NoSparksPlease
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