An toànCâu 438 / 521
For electrical equipment rated 1,200 amperes or more and over 6 feet wide, how many entrances to the working space are generally required?
a.One 24-inch door is enough
b.No entrance requirement applies
c.A window at one end
d.Two entrances/means of egress, one at each end of the working space (with limited exceptions)
Giải thích
Large equipment (1,200A or more and over 6 feet wide) generally requires an entrance/egress at each end of the working space so a worker can escape an arc flash. One door or no requirement leaves a worker potentially trapped behind an arcing fault. A window is not an approved means of egress here.
Trích dẫn luật: 2023 NEC §110.26Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
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