A multiwire branch circuit must have a means to disconnect all ungrounded conductors simultaneously at the panelboard. This requirement is satisfied by:
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ATwo separate single-pole breakers on the same leg
BA single two-pole breaker with separate handles
CAny combination of breakers that interrupts both hot conductors
DA two-pole breaker or a handle tie on adjacent single-pole breakers
✓ Correct answer: D. A two-pole breaker or a handle tie on adjacent single-pole breakersNEC 210.4(B) requires that multiwire branch circuits have a means to simultaneously disconnect all ungrounded conductors. This can be accomplished with a 2-pole breaker or single-pole breakers equipped with an identified handle tie.
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