Mạch nhánh & Đi dâyCâu 180 / 521
An outlet box used as the sole support for a ceiling-suspended (paddle) fan must be what?
a.Listed and marked for that purpose
b.Any 4-inch square box
c.A plastic device box
d.A handy box
Giải thích
Section 314.27(C) requires an outlet box used as the sole support of a ceiling-suspended paddle fan to be listed and marked for that application, and to support the fan weight. A standard 4-in square box, a plastic device box, or a handy box not so listed cannot serve as the sole fan support.
Trích dẫn luật: 2023 NEC §314.27(C)Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- The rating of a branch circuit supplying two or more outlets is determined by what?
- The working space required in front of electrical equipment must be kept clear and, in general, may be used for what purpose?
- Couplings and connectors used with electrical metallic tubing (EMT) in a wet location must be what?
- A 4" x 1-1/2" square box has a volume of 21.0 in³. With no clamps, devices, or other allowances, what is the maximum number of 14 AWG conductors permitted in the box?
- Using the same 21.0 in³ box with no other fill allowances, what is the maximum number of 12 AWG conductors permitted?
- Per Table 314.16(B), what is the free-space volume allowance required for a single 12 AWG conductor?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-10 Electrical Trade Examination · Quy trình kiểm tra