SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/osha-loto-lock-vs-tag

What does a lockout device do that a tagout device does not?

It physically holds the energy isolating device in a safe position.

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  1. Warns people in big letters
  2. Physically holds the switch in a safe position ✔
  3. Records who serviced the machine

Why: A lockout device, like a lock, uses a positive means to hold an energy isolating device in a safe position. A tag is a prominent warning but does not physically stop anyone.

Huh, didn't know that: If a machine can be locked out, OSHA requires lockout unless tagout gives full employee protection.

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Why did the lock break up with the tag? It wanted someone more secure.
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References

Answer: Physically holds the switch in a safe position. A lockout device, like a lock, uses a positive means to hold an energy isolating device in a safe position. A tag is a prominent warning but does not physically stop anyone.

  1. 29 CFR 1910.147 The control of hazardous energy (lockout/tagout) www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-J/section-1910.147
    A device that utilizes a positive means such as a lock, either key or combination type, to hold an energy isolating device
    Checked 2026-10-10.

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