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Is a 3 phase cable one circuit?

Updated: 11/23/2022
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15y ago

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If it is powering a single 3 phase device and is protected by a single throw 3 pole breaker or disconnect, yes. If all three hots share one neutral, and supply different devices or circuits, breakers should be able to trip independently but would still have to disconnect all three phases together.

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Q: Is a 3 phase cable one circuit?
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