Services & DistributionCâu 38 / 110
A panelboard is rated 225 A. What is the maximum rating of the overcurrent device that may protect it?
a.200 A
b.225 A
c.250 A
d.400 A
Giải thích
Each panelboard must be protected by an overcurrent device rated no more than the panelboard rating, so 225 A is the maximum.
Trích dẫn luật: 2023 NEC 408.36Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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