1910.303(b)(1)(iv): Electrical Insulation as a Safety Factor
This item lists electrical insulation as one of the considerations used when examining electrical equipment to decide whether it is free from recognized hazards.
Key takeaways
- 1910.303(b)(1)(iv) is part of OSHA's general industry standards (29 CFR Part 1910, Subpart S).
- OSHA cited it 47 times in the last 3 years, in 47 inspections, with $120,721 in current penalties.
- Most citations: TX (14), MO (9), NY (6).
- Related part: 1910.303(b) Examination, installation, and use of equipment (3,837 citations).
- Free 5-minute toolbox talk for your crew below.
In this article
What this rule covers
29 CFR 1910.303(b)(1)(iv) is one requirement inside 1910.303 General, an OSHA general industry standard (Part 1910, Subpart S). 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
(iv) Electrical insulation; 47 citations
Source: eCFR, text current as of 2026-10-15. Read all of 1910.303.
Where and how often it was cited
| Year | Citations |
|---|---|
| 2023 | 3 |
| 2024 | 22 |
| 2025 | 15 |
| 2026 | 7 |
Top states: TX (14), MO (9), NY (6), IL (3), CO (2)
Largest penalties
| Employer | Location | Penalty for this rule |
|---|---|---|
| TRI-B INDUSTRIES CORPORATION | NEWARK, NJ | $11,585 |
| CENTRAL TRANSPORT LLC | PEORIA HEIGHTS, IL | $9,126 |
| GENERAL MILLS INC. | KANSAS CITY, MO | $8,296 |
| 159436 - SUNNYBROOK REHABILITATION CENTER, LLC | RALEIGH, NC | $8,000 |
| SGC FOODSERVICE | SPRINGFIELD, MO | $7,374 |
Free toolbox talk
A 5-minute crew talk on 1910.303(b)(1)(iv), plus alerts when this rule changes. Free.
OSHA interpretation letters
None exist. OSHA has not published a letter of interpretation for 1910.303(b)(1)(iv).
Related parts of this rule
- 1910.303(b) Examination, installation, and use of equipment 3,837 citations
- 1910.303(b)(2) Installation and use 2,289 citations
- 1910.303(b)(7) Mechanical execution of work 827 citations
- 1910.303(b)(1) Examination 489 citations
- 1910.303(b)(7)(iv) 398 citations
- 1910.303(b)(7)(i) 349 citations
- 1910.303(b)(8) Mounting and cooling of equipment 145 citations
- 1910.303(b)(8)(i) 143 citations
- 1910.303(b)(6) Deteriorating agents 75 citations
- 1910.303(b)(1)(ii) 38 citations
- 1910.303(b)(1)(i) 24 citations
- 1910.303(b)(1)(viii) 20 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 item cover?
Electrical insulation, one of the considerations listed in 1910.303(b)(1) for examining electrical equipment.
Why does insulation matter?
Insulation is one of the listed factors used to judge whether equipment is safe to use.
Where is the full list of factors?
In 1910.303(b)(1), which lists several considerations for examining equipment.
About this page
Sources
- 29 CFR 1910.303 (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.