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National Electrical Code (NEC) Mastery Challenge
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In a multiwire branch circuit, what must be provided at the panelboard origin to disconnect all ungrounded conductors simultaneously?
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Hint
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⚖️
50-50
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👥
Audience
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A
A single-pole circuit breaker
B
An approved means that simultaneously disconnects all ungrounded conductors
C
A solid neutral bar connection
D
A shunt-trip relay only
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