1926.403(b)(1)(iii): Electrical Insulation
When judging whether electrical equipment is safe, employers must consider its electrical insulation.
Key takeaways
- 1926.403(b)(1)(iii) is part of OSHA's construction standards (29 CFR Part 1926, Subpart K).
- OSHA cited it 18 times in the last 3 years, in 18 inspections, with $28,565 in current penalties.
- Most citations: NY (3), TX (3), MO (3).
- Related part: 1926.403(b) Examination, installation, and use of equipment (523 citations).
- Free 5-minute toolbox talk for your crew below.
In this article
What this rule covers
29 CFR 1926.403(b)(1)(iii) is one requirement inside 1926.403 General requirements, an OSHA construction standard (Part 1926, Subpart K). 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
(iii) Electrical insulation. 18 citations
Source: eCFR, text current as of 2026-10-15. Read all of 1926.403.
Where and how often it was cited
| Year | Citations |
|---|---|
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 9 |
| 2026 | 2 |
Top states: NY (3), TX (3), MO (3), NC (2), GA (2)
Largest penalties
| Employer | Location | Penalty for this rule |
|---|---|---|
| FIGURA SOLUTIONS LLC. | GREENWOOD, MO | $3,547 |
| WOOD HOMES CONSTRUCTION, INC. | PENFIELD, NY | $3,496 |
| ARMENDARIZ CONSTRUCTION LLC | EL PASO, TX | $3,457 |
| LUDWIN URBINA | LEES SUMMIT, MO | $3,042 |
| MIGUEL CONTRERAS | EL PASO, TX | $3,000 |
Free toolbox talk
A 5-minute crew talk on 1926.403(b)(1)(iii), plus alerts when this rule changes. Free.
OSHA interpretation letters
None exist. OSHA has not published a letter of interpretation for 1926.403(b)(1)(iii).
Related parts of this rule
- 1926.403(b) Examination, installation, and use of equipment 523 citations
- 1926.403(b)(2) Installation and use 290 citations
- 1926.403(b)(1) Examination 233 citations
- 1926.403(b)(1)(i) 9 citations
Get your crew competent
Trainers on Black Belt Safety: Marc Harvey, Dana Reyes
Trainers and suppliers: feature your business on this rule for $25/month.
Frequently asked questions
What does this paragraph require?
Electrical insulation is one of the factors used to judge whether electrical equipment is free from hazards.
Where is this paragraph found?
In 1926.403(b)(1), which lists items considered in examining electrical equipment.
Does this apply to construction?
Yes. It is part of the construction electrical standard, 1926.403.
About this page
Sources
- 29 CFR 1926.403 (eCFR), text current as of 2026-10-15
- U.S. Department of Labor enforcement data: OSHA inspections, citations and accident records, copied nightly; data as of 2026-10-20
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.