1910.304(a)(1): Identification of conductors
Key takeaways
- 1910.304(a)(1) is part of OSHA's general industry standards (29 CFR Part 1910, Subpart S).
- Related part: 1910.304(a) Use and identification of grounded and grounding conductors (29 citations).
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What this rule covers
29 CFR 1910.304(a)(1) ("Identification of conductors") is one requirement inside 1910.304 Wiring design and protection, an OSHA general industry standard (Part 1910, Subpart S). It includes 2 sub-paragraphs. The official text below is copied word for word from the Electronic Code of Federal Regulations (eCFR). The numbers, injury cases and training on this page show how OSHA enforces it on real job sites.
Official text
(1) Identification of conductors.
(i) A conductor used as a grounded conductor shall be identifiable and distinguishable from all other conductors.
(ii) A conductor used as an equipment grounding conductor shall be identifiable and distinguishable from all other conductors.
Source: eCFR, text current as of 2026-10-15. Read all of 1910.304.
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OSHA interpretation letters
- Covering for Grounded Contact Conductors on Overhead Traveling Crane Systems (Patrick E. Wall/DEP/GIE/Harvey/26611) (2015-06-29)
Related parts of this rule
- 1910.304(a) Use and identification of grounded and grounding conductors 29 citations
- 1910.304(a)(2) Polarity of connections 27 citations
- 1910.304(a)(3) Use of grounding terminals and devices 2 citations
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About this page
Sources
- 29 CFR 1910.304 (eCFR), text current as of 2026-10-15
- U.S. Department of Labor enforcement data: OSHA inspections, citations and accident records, copied nightly
3-year window. Federal OSHA only; state-plan rules are not counted. Plain-language text is a summary, not legal advice; the official text controls. Black Belt Safety is not part of OSHA or the Department of Labor.