Mạch nhánh & Đi dâyCâu 171 / 521
Rigid metal conduit (RMC) is permitted to be used under which of the following conditions?
a.Only in dry locations
b.Only where concealed
c.Only in dwellings
d.In all atmospheric conditions and occupancies
Giải thích
Section 344.10 permits RMC in all atmospheric conditions and occupancies, with appropriate corrosion protection where needed. It is one of the most robust raceways. Limiting it to dry, concealed, or dwelling-only uses understates the broad permission the code grants RMC.
Trích dẫn luật: 2023 NEC §344.10Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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