An toànCâu 430 / 521
Under Cal/OSHA and NFPA 70E, the primary/preferred way to protect workers from electrical hazards is to:
a.De-energize the equipment and establish an electrically safe work condition whenever it is feasible
b.Put on an arc-flash suit and work the equipment while energized
c.Use insulated tools only and skip other protections
d.Post a warning sign near the panel
Giải thích
The hierarchy of controls makes de-energizing and creating an electrically safe work condition the primary protection; energized work is only permitted when de-energizing is infeasible or introduces greater hazards. PPE, insulated tools, and signs are supplemental and do not replace de-energizing when it can be done.
Trích dẫn luật: Cal/OSHA Title 8 §2320.2Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Crossing the restricted approach boundary toward an exposed energized part requires:
- An arc-flash study shows an available incident energy of 8 cal/cm² at the working distance. The arc-rated clothing and PPE must have an arc rating of:
- Rubber insulating gloves used for energized work on a 480V system must be:
- An energized electrical work permit is generally required when:
- Before you rely on a voltage detector to verify absence of voltage, you should:
- You are servicing a circuit that feeds a variable frequency drive (VFD) with large DC-bus capacitors. After disconnecting power you must:
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