An toànCâu 465 / 521
An arc-flash hazard warning label applied to equipment should list information such as:
a.The paint color of the enclosure
b.Only the equipment manufacturer's name
c.The phone number of the electric utility
d.Nominal system voltage, the arc flash boundary, and the available incident energy or the required level of PPE
Giải thích
A useful arc-flash label conveys the nominal voltage, arc flash boundary, and either available incident energy or the required PPE so workers can select proper protection. Paint color, the manufacturer alone, or the utility's phone number do not tell a worker how to protect against the arc-flash hazard.
Trích dẫn luật: 2023 NEC §110.16Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- The OSHA 10-hour Construction course primarily covers:
- Electrocution is one of OSHA's construction 'Focus Four' hazards. The other three are:
- An unqualified worker must walk past an open 480V panel with exposed live parts to reach a work area. What must happen?
- Which equipment, when likely to require examination or servicing while energized, must be field- or factory-marked to warn of potential arc-flash hazards?
- When working within the restricted approach boundary of exposed energized parts, hand tools should be:
- To protect other workers from an area where justified energized work is being performed, the qualified person should:
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