Overhead power line contact is one of the most common causes of operator fatalities in heavy equipment. Electricity can arc — you don't have to actually touch the line. Most contacts happen during dump truck raising, crane operation, excavator boom swing, and skid steer / loader work near services to buildings. Once contacted, leaving the cab or letting a coworker approach is usually fatal.
| Voltage | Minimum Distance |
|---|---|
| Under 60 kV (most service lines) | 3 m (10 ft) |
| 60–250 kV | 4.5 m (15 ft) |
| Over 250 kV (transmission) | 6 m (20 ft) |
Note: distances vary slightly by province. Always check with your jurisdictional regulator.
| # | Discussion Point |
|---|---|
| 1 | Identify lines BEFORE work starts. Walk the site. Look up. Mark them on the site plan. Don't assume — confirm voltage with the utility if unsure. |
| 2 | Use a spotter for any work within 7 m of lines. Even if you think you're outside the minimum distance. The spotter watches the boom or load, not the operator. |
| 3 | If the utility can't deenergize, isolate, or relocate, you need a permit. Plus barriers, safety observer, written procedure. No shortcuts. |
| 4 | If contact happens — stay in the cab. Tires insulate you. Radio for help. Have ground workers stay back at least 10 m. Don't let anyone touch the machine. |
| 5 | Only exit if absolutely necessary (fire, etc.): jump clear, both feet together, no part touches the machine and the ground at the same time. Then shuffle away in small steps — never taking a normal step — to avoid step potential. |