Mạch nhánh & Đi dâyCâu 226 / 521
Which cable relies on its metal armor together with an internal aluminum bonding strip to serve as the equipment grounding path?
a.Type MC
b.Type AC
c.Type NM
d.Type UF
Giải thích
Per 320.100, Type AC cable includes an internal bonding strip that, combined with the armor, forms an effective ground-fault return path. Type MC generally includes a separate equipment grounding conductor, while NM and UF use an insulated or bare EGC, not the armor.
Trích dẫn luật: 2023 NEC §320.100Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Under what condition may Type MC cable be installed in a wet location?
- Per 320.40, what must be installed at each termination of Type AC (armored) cable to protect the conductors from the cut edge of the metal armor?
- Per 320.30, Type AC cable must be secured and supported at intervals not exceeding what distance?
- The NEC informational note recommends that voltage drop on a branch circuit not exceed what percentage of the circuit voltage?
- For the combined feeder plus branch circuit, the NEC informational note recommends total voltage drop not exceed what percentage?
- A 120 V single-phase circuit uses 12 AWG copper (6,530 cmil) carrying 20 A over a one-way length of 100 ft. Using VD = 2 × K × I × L ÷ cmil with K = 12.9, what is the approximate voltage drop?
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