An toànCâu 1280 / 1605
On construction sites, which system is required to protect workers using 120-volt, single-phase, 15- and 20-amp receptacle outlets not part of the permanent wiring?
a.Ground-fault circuit interrupter (GFCI) protection or an assured equipment grounding conductor program
b.Double the fuse size
c.Higher wattage bulbs
d.Extension cords only
Giải thích
1926.404(b)(1) requires GFCI protection for those temporary receptacles, or an assured equipment grounding conductor program. GFCIs protect against ground faults common on wet, rugged jobsites.
Trích dẫn luật: 29 CFR 1926.404(b)(1)Luyện miễn phí toàn bộ 1605 câu hỏi — không cần đăng ký.
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Sen Lin, Người sáng lập PrepPass · Đối chiếu với California CSLB Contractor License Law & Business Exam · Quy trình kiểm tra
Người kiểm duyệt Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — kiểm tra)