Mạch nhánh & Đi dâyCâu 169 / 521
Electrical metallic tubing (EMT) is generally not permitted to be used in which condition?
a.Concealed in walls
b.Where subject to severe physical damage
c.In dry indoor locations
d.Exposed on masonry
Giải thích
Section 358.12 prohibits EMT where subject to severe physical damage. EMT is permitted concealed in walls, in dry locations, and exposed on masonry when properly supported and protected. Only the severe-physical-damage condition is a listed prohibition among these choices.
Trích dẫn luật: 2023 NEC §358.12Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Bends in electrical metallic tubing (EMT) must be made so that which of the following is true?
- Direct-buried conductors or cables emerging from grade must be protected by enclosures or raceways from the required cover depth up to what height above finished grade?
- Rigid polyvinyl chloride conduit (PVC) is permitted to be used in which of the following locations?
- Liquidtight flexible metal conduit (LFMC) is especially suited for which of the following uses?
- Rigid metal conduit (RMC) is permitted to be used under which of the following conditions?
- Cables or raceways installed under metal-corrugated sheet roof decking must be kept at least what distance from the lowest surface of the roof decking to the top of the raceway or cable?
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