The Number
65 percent.
That is construction's share of all U.S. work-related electrocution fatalities, based on CPWR's analysis of BLS Census of Fatal Occupational Injuries (CFOI) data. Construction is roughly 7 percent of the U.S. workforce, yet it absorbs nearly two out of every three electrocution deaths recorded across every industry combined.
Electrocution has been an OSHA Focus Four hazard for decades. The percentage has not improved meaningfully. That tells us the problem is not awareness. It is the gap between the pre-task plan we wrote and the pre-task plan we executed when the boom went up or the panel cover came off.
What's Behind It
Two job families drive the count. Electrical workers and construction laborers are the occupations most frequently killed by electrocution on construction sites, per the CPWR bulletin. Electricians die working hot or working circuits they believed were dead. Laborers die guiding loads, handling rebar or metal forms, or standing near equipment that contacted an overhead line.
The hazard pattern concentrates in summer. Crane and boom work, road and utility excavation, signage, roofing antenna and mast work, and temporary power for outdoor events all peak between June and September. Sweat lowers skin resistance, wet ground after a thunderstorm completes circuits that dry dirt would not, and longer daylight hours stretch shifts past the point where pre-task plans get a second look.
The third driver is temporary power itself. Cord sets get dragged across rebar, run through doorways, and left in puddles. GFCI receptacles get bypassed when they nuisance-trip. Panels get worked hot because shutting them down would idle a crew. None of this is new. All of it is fatal.
Three Patterns Worth Knowing
1. Mobile equipment versus overhead lines is the top kill mechanism
- Dump beds raised under distribution lines, crane booms swung into clearances, and aerial lifts drifting under conductors account for the largest share of contact events in the CPWR review.
- The operator in an insulated cab often survives. The laborer touching the outrigger, tag line, or load does not, because step-and-touch potential energizes the ground around the machine.
- High-voltage current can arc several feet through air to a grounded path. Physical contact is not required for a fatal shock.
2. Energized work on temporary power panels keeps showing up
- 29 CFR 1926.417 requires controls to be locked out or tagged at their source before work begins. Investigations repeatedly find work performed on live panels because nobody wanted to call the GC to drop power.
- 29 CFR 1926.404(b)(1)(ii) requires GFCI protection on all 120-volt, single-phase, 15-, 20-, and 30-ampere receptacles used by construction personnel. Missing or defeated GFCIs are a recurring inspection finding.
- Damaged cord sets with cut jackets, missing ground prongs, or repaired splices remain one of the most common 1926 Subpart K citations.
3. The 10-foot rule is a floor, not a ceiling
- 29 CFR 1926.1408 sets a minimum 10-foot clearance for cranes near lines up to 50 kV, with greater clearances required as voltage rises.
- The standard requires planning before the lift: identify the line, encroachment-prevention measures, a dedicated spotter, and de-energization or insulation by the utility when practical.
- Proximity alarms and boom cages are aids, not substitutes for clearance and a spotter with one job.
What This Means For Your Crew
- Use the hierarchy of controls in this order, every time: eliminate the hazard (have the utility de-energize and ground the line), substitute (reroute the work, use a smaller machine), engineer (insulating barriers installed by the utility, physical line markers), administrate (10-foot rule, dedicated spotter, exclusion zones), then PPE last. PPE alone does not stop a 13 kV line.
- Before any lift, locate every overhead line on your site and mark it at ground level so operators see it from the cab.
- A spotter watching the line is a spotter doing one job. If they are also rigging, they are not spotting.
- Test every GFCI on site at the start of the shift with the test button. A GFCI that will not trip is not protection.
- Stop-work authority applies to electrical hazards without exception. Anyone can call it, no one gets retaliated against, and we report back what was fixed before the next shift. That is the rule on this site.
Action Steps
- Walk the site this morning, identify every overhead line, log the voltage with the utility, and post ground-level warning markers and clearance distances at each approach.
- Verify every 120-volt receptacle in use has a functioning GFCI; press test, press reset, tag and remove any that fail.
- Pull all extension cords and inspect for jacket damage, exposed conductors, and missing ground prongs; cut and discard failures on the spot.
- Assign and brief a dedicated spotter for every crane, boom truck, dump truck, or aerial lift operating within 20 feet of any overhead line; confirm radio channel and stop signal before the first move.
- Confirm lockout/tagout kits are stocked, every worker who touches energized equipment has a personal lock, and any panel work scheduled today has a documented de-energization plan signed by the competent person.
Discuss As A Crew
- Where on this site are we most likely to break the 10-foot rule today, and what changes if a summer storm rolls in this afternoon?
- When was the last time someone on this crew called stop-work on an electrical hazard? What happened next?
- If a coworker contacted an energized line right now, what is our first move, and who calls the utility?
Verify Before You Sign Off
- Point to the nearest overhead line and tell me its clearance distance and voltage.
- Show me a GFCI you tested this morning.
Comprehension Check
- What percentage of U.S. electrocution deaths happen in construction, and name two reasons that share has not dropped?
- Which control on the hierarchy beats a 10-foot clearance rule, and who has to make it happen?
Close The Loop
Any hazard flagged today gets logged by the foreman, fixed or barricaded before the next shift, and the fix gets reported back at tomorrow's huddle. No retaliation, ever, for calling something out.
Sources
- Electrocutions in Construction Data Bulletin — CPWR, 2025. cpwr.com
- Census of Fatal Occupational Injuries (CFOI) — U.S. Bureau of Labor Statistics, December 2024. bls.gov
- 29 CFR 1926.1408 Power line safety (up to 350 kV) equipment operations — OSHA. osha.gov
- 29 CFR 1926.404(b)(1)(ii) Ground-fault protection — OSHA. osha.gov
- 29 CFR 1926.417 Lockout and tagging of circuits — OSHA. osha.gov