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SESK: Stuff Everyone Should Know · sesk.info/elec-qualified-only

Under OSHA 1910.333, who may work on electric parts that have not been deenergized?

Only qualified persons.

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  1. Any employee wearing rubber gloves
  2. Only qualified persons ✔
  3. Any employee with a buddy

Why: A qualified person is trained to tell exposed live parts from other parts, find their nominal voltage and apply the clearance distances. Everyone else keeps away.

Huh, didn't know that: OSHA 1910.332 says training can be classroom or on-the-job, scaled to the risk.

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Keep calm and ohm on.
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References

Answer: Only qualified persons. A qualified person is trained to tell exposed live parts from other parts, find their nominal voltage and apply the clearance distances. Everyone else keeps away.

  1. OSHA 29 CFR 1910.333 www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.333
    Only qualified persons may work on electric circuit parts or equipment that have not been deenergized.
    Checked 2026-10-10.
  2. OSHA 29 CFR 1910.332 www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.332
    The training required by this section shall be of the classroom or on-the-job type.
    Checked 2026-10-10.

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