Dịch vụ & Phân phốiCâu 112 / 521
Where multiple service disconnects are installed under the 2023 NEC, the general requirement (compared to older editions) is that they be:
a.Operable by a maximum of six movements of the hand in one enclosure
b.Installed in separate enclosures, or in a listed assembly, rather than up to six switches in a single common enclosure
c.Interlocked so only one can open at a time
d.Located outdoors only
Giải thích
The 2023 NEC changed the multiple-disconnect rule so that up to six service disconnects must be in separate enclosures (or part of a listed switchboard, switchgear, or metering-disconnect assembly), rather than as several breakers in one common enclosure. The old six-hand-movement allowance in a single cabinet is no longer the general rule.
Trích dẫn luật: 2023 NEC §230.71Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A detached garage is supplied by a feeder from the main dwelling. At the garage, the code generally requires:
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