An toànCâu 464 / 521
An unqualified worker must walk past an open 480V panel with exposed live parts to reach a work area. What must happen?
a.They must stay outside the limited approach boundary unless continuously escorted by a qualified person and using appropriate PPE
b.Crossing the arc flash boundary is perfectly fine for them
c.They may cross the restricted approach boundary since it is only 480V
d.There are no restrictions at all for 480V equipment
Giải thích
Unqualified persons must stay outside the limited approach boundary unless escorted by a qualified person and protected with appropriate PPE. They are never allowed to cross the restricted approach boundary, and 480V exposed parts absolutely carry shock and arc-flash hazards that require these restrictions.
Trích dẫn luật: NFPA 70ELuyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- On many California jobsites, which OSHA safety training is typically expected for supervisors versus entry-level workers?
- The OSHA 10-hour Construction course primarily covers:
- Electrocution is one of OSHA's construction 'Focus Four' hazards. The other three are:
- An arc-flash hazard warning label applied to equipment should list information such as:
- 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:
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