SESK: Stuff Everyone Should Know · sesk.info/osha-exposed-energized-parts-guarded
On a construction site, what must be done with live electrical parts of 50 volts or more?
Guard them with enclosures or by location.
- Guard them with enclosures or by location ✔
- Mark them with red paint only
- Leave them open for inspection
Why: 1926.403(i)(2)(i) says live parts at 50 volts or more must be guarded against accidental contact by cabinets or enclosures, or by location, such as a room only qualified people can enter.
Huh, didn't know that: Other allowed guards include partitions or screens, or raising the parts 8 feet or more above the floor.
Why did the electrical panel get an enclosure? To keep live parts out of reach.
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References
Answer: Guard them with enclosures or by location. 1926.403(i)(2)(i) says live parts at 50 volts or more must be guarded against accidental contact by cabinets or enclosures, or by location, such as a room only qualified people can enter.
- 29 CFR 1926.403(i)(2)(i) www.law.cornell.edu/cfr/text/29/1926.403
live parts of electric equipment operating at 50 volts or more shall be guarded against accidental contact by cabinets or other forms of enclosures
Checked 2026-10-10.
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