Advanced WiringCâu 73 / 110
A required branch circuit that supplies a sign or outline lighting system must be rated at least:
a.20 A
b.15 A
c.30 A
d.40 A
Giải thích
Each commercial building must have at least one dedicated 20-A branch circuit for a sign or outline lighting outlet.
Trích dẫn luật: 2023 NEC 600.5(B)Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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