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Old 09-22-2010, 12:30 AM   #1
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what is a multiwire branch circuit?

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Old 09-22-2010, 04:09 AM   #2
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From article 100 - Definitions of the NEC:

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Branch Circuit, Multiwire. A branch circuit that consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system.

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Old 09-22-2010, 04:29 AM   #3
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A circuit ,two hots,sharing a common neutral. They have to be on opposing "phases" so the returning current cancels each out. Also can be 3 phase.
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