An toànCâu 418 / 521
You opened the disconnect for a 480V motor circuit and applied your personal lock and tag. What is the FINAL step required before you may treat the conductors as safe to touch?
a.Wait 30 minutes for any capacitors to bleed off
b.Confirm the tag is signed and dated
c.Test the conductors with an adequately rated voltage tester, then re-test the tester on a known live source to prove it works
d.Notify the building owner in writing
Giải thích
Verifying the absence of voltage with a rated tester, and proving the tester is functioning before and after (live-dead-live), is the required final step. Waiting and checking the tag are part of lockout/tagout but do not confirm zero energy. Notifying the owner is not a safety verification of the conductors.
Trích dẫn luật: Cal/OSHA Title 8 §3314Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which sequence correctly describes the basic lockout/tagout procedure before servicing electrical equipment?
- A crew of four electricians is servicing the same de-energized 480V feeder. How should lockout be handled?
- An electrician left the jobsite for the day and forgot to remove his lockout lock. How may it be removed?
- On a construction site, which receptacles must have GFCI protection for personnel?
- A Class A GFCI intended to protect people trips at approximately what ground-fault current?
- What is the difference between a Class A (personnel) GFCI and a 30-milliampere 'equipment' ground-fault protection device?
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