Lập kế hoạch & Dự toánCâu 413 / 521
What is the minimum width of working space in front of electrical equipment (or the width of the equipment, whichever is greater)?
a.24 in
b.30 in
c.36 in
d.18 in
Giải thích
The working space must be at least 30 in wide, or the width of the equipment, whichever is greater. Narrower dimensions such as 24 in or 18 in do not meet the minimum.
Trích dẫn luật: 2023 NEC §110.26(A)(2)Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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