Dịch vụ & Phân phốiCâu 31 / 521
Why is a service disconnect required to be readily accessible and located near the point of entrance of the service conductors?
a.To reduce voltage drop
b.To improve power factor
c.To allow quick de-energizing of the premises in an emergency
d.To meet minimum ampacity
Giải thích
A readily accessible service disconnect near the entrance lets responders quickly de-energize the building and limits the length of unprotected service-entrance conductors inside. Voltage drop, power factor, and ampacity are unrelated to the disconnect-location rule.
Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
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