Electrical — Wiring Methods, Components, and Equipment (29 CFR 1926.405)
Electrical wiring violations under Subpart K address temporary wiring, GFCI protection, and equipment grounding on construction sites. Electrocution is one of OSHA's "Fatal Four" causes of construction deaths.
What 29 CFR 1926.405 Requires
Electrical wiring requirements under Subpart K address temporary wiring, GFCI protection, and equipment grounding on construction sites. Electrocution is one of OSHA's "Fatal Four" — the four leading causes of construction worker deaths. The standard requires either GFCI protection or an assured equipment grounding conductor program:
- GFCI protection or assured equipment grounding conductor program required
- Temporary wiring must be removed immediately upon completion of the project
- Extension cords must be three-wire type and designed for hard or extra-hard usage
- Damaged or defective electrical equipment must be removed from service
- Electrical equipment must be listed and labeled for intended use
- Flexible cords must be connected to approved devices and fittings
Most Common Violations
Electrical violations on construction sites are often the result of temporary wiring conditions that persist longer than intended. Damaged extension cords and missing GFCI protection are the most frequently cited conditions because they are immediately visible during a walkaround:
- Missing GFCI protection on temporary wiring
- Damaged extension cords or cords with missing grounding prongs
- No assured equipment grounding conductor program documentation
- Temporary wiring left in place beyond project completion
- Electrical equipment used in wet conditions without proper protection
- Improper use of flexible cords as permanent wiring substitutes
Penalty Exposure
Penalty range: $1,190–$16,550 per serious violation; up to $165,514 per willful violation
Electrical violations carry significant penalties because electrocution hazards are immediately dangerous to life and health. A single serious electrical citation can cost up to $16,550 in 2026. When multiple outlets or cords are non-compliant, OSHA may issue separate citations for each instance, rapidly increasing total penalty exposure.
Having an assured equipment grounding conductor program with documented testing records demonstrates proactive compliance and significantly reduces the likelihood of willful classification.
Documentation You Need
Electrical documentation on construction sites centers on GFCI protection or the assured grounding program alternative. If you choose the assured grounding route, the documentation requirements are extensive:
- Written assured equipment grounding conductor program (if GFCI not used)
- Equipment grounding conductor testing records at required intervals
- Daily inspection records for temporary electrical equipment
- Defective equipment removal and replacement logs
- Competent person designation for electrical safety program
- Training records for electrical hazard awareness
What Inspectors Look For
During an OSHA inspection, electrical conditions are checked during the walkaround. Inspectors look for visible hazards first, then request documentation for the grounding program. Here is what they specifically evaluate:
- GFCI presence on all temporary power outlets — visual check during walkaround
- Condition of extension cords and flexible wiring — fraying, missing prongs, damage
- Written assured grounding program if GFCI alternative is claimed
- Testing records for grounding conductor program
- Labeling and listing of electrical equipment
- Worker awareness of electrical hazard reporting procedures
Get Your Electrical Safety Documentation in Order
The OSHA Defense Documentation System includes daily inspection log templates and equipment tracking systems that cover electrical safety documentation requirements under Subpart K.
Check My Documentation Readiness