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SESK: Stuff Everyone Should Know · sesk.info/elec-tag-vs-lock

Why is a lock considered stronger than a tag in lockout/tagout?

Tags warn, locks restrain.

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  1. Tags cost more than locks
  2. Locks can be installed live
  3. A tag is only a warning, not a physical restraint ✔

Why: A tag can be ignored or removed by accident, but a lock stops a switch from being turned on. OSHA generally requires locks where a device can be locked.

Huh, didn't know that: OSHA says a tag must never be bypassed or ignored, and comes off only with the responsible person's authorization.

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Two electricians argued for five days. They just could not find any common ground.
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References

Answer: A tag is only a warning, not a physical restraint. A tag can be ignored or removed by accident, but a lock stops a switch from being turned on. OSHA generally requires locks where a device can be locked.

  1. OSHA 29 CFR 1910.147 www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.147
    do not provide the physical restraint on those devices that is provided by a lock
    Checked 2026-10-10.

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Workplace Safety (OSHA)OSHA's lockout/tagout standard exists to prevent what?Workplace Safety (OSHA)Under OSHA rules, who normally removes a lockout or tagout device?Workplace Safety (OSHA)At a minimum, how often must a lockout/tagout procedure be inspected?

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