Services & DistributionQuestion 107 of 521
Service-entrance conductors installed in a raceway in a wet location (such as underground or exposed to weather) must be:
a.Any dry-rated conductor is acceptable
b.Bare copper only
c.Type TW without a jacket
d.Listed and marked for wet locations, such as RHW, THW, THWN, or XHHW
Explanation
Per 310.10(C), conductors in wet locations (including raceways underground or exposed to weather) must be a type listed for wet locations, such as RHW, THW, THWN, or XHHW. Dry-only types or bare conductors are not permitted where moisture is present.
Law Reference: 2023 NEC §310.10Practice all 521 questions free — no signup required.
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