Before assembly or disassembly of a crane or other equipment, the employer must determine if it could come within 20 feet of a power line (up to 350 kV). If so, the employer must take one of the following actions:

• Confirm with the power company that the line is de-energized and visibly grounded at the worksite.
• Make sure no part gets within 20 feet of the power line.
• Follow Table A, which has minimum clearance distances based on voltage

TABLE A: MINIMUM CLEARANCE DISTANCES BASED ON VOLTAGE (OSHA 1926.1408 Table A)

Voltage (kV)	Minimum clearance distance (feet)
Up to 50 kV	10 ft
>50 to 200 kV	15 ft
>200 to 350 kV	20 ft
>350 to 500 kV	25 ft*
>500 to 750 kV	35 ft*
>750 to 1,000 kV	45 ft*
>1,000 kV	Determined by the utility/owner
*According to 1926.1409, for power lines over 350 to 1,000 kV, the minimum distance is presumed to be 50 feet. Over 1,000 kV, the utility/owner or a registered engineer must establish it.

EQUIPMENT CLEARANCE DISTANCES

Equipment traveling under or near a power line must:

(a) Have a lowered boom/mast and support system
(b) Obey minimum clearance distances set in Table T
(c) Reduce speeds to minimize breaching
(d) Use a dedicated spotter if closer than 20 feet
(e) Illuminate or identify the power lines at night
(f) Identify and use a safe path of travel.

TABLE T  – Minimum clearance distances while traveling with no load

Voltage (kV)	Minimum clearance distance (feet)
Up to 0.75 kV	4 ft
>0.75 to 50 kV	6 ft
>50 to 345 kV	10 ft
>345 to 750 kV	16 ft
>750 to 1,000 kV	20 ft
> 1,000 kV	*
>1,000	Determined by the utility/owner
*Established by owner or registered professional engineer/qualified person.