When the NEC requires that equipment be 'listed,' it means the equipment has been:

When the NEC requires that equipment be

Multiple choice — select the best answer

AApproved only by the AHJ on-site
BEvaluated by a nationally recognized testing laboratory and found to meet specific standards
CManufactured in the United States
DTested by the installing contractor

✓ Correct answer: B. Evaluated by a nationally recognized testing laboratory and found to meet specific standards Listed equipment has been examined by an NRTL (such as UL or ETL) and found to meet applicable product standards. The NEC strongly prefers listed equipment because it provides a documented baseline of safety.

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Topic: Code Administration & Safety

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When the NEC requires that equipment be 'listed,' it means the equipment has been:

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