Make a Safety Boundary
When working with ladders or long tools:
Stay at least 10 feet away from overhead power lines carrying up to 50kV.
When cranes or derricks are used in construction:
Keep the crane boom and load at least 20 feet away from the line if you don’t know the line’s voltage. Always assume the line is energized, and allow nothing closer than 20 feet unless you have confirmed with the utility owner/operator that the line has been deenergized.
As voltage increases, clearance distances also increase.
Contact your local utility and consult the OSHA regulations at
www.osha.gov for specific safety clearance requirements.
Clearly mark boundaries.
Use tape, signs, or barricades to keep workers and equipment the required distance away.
If you are in doubt about line voltages, clearance requirements, or how to work safely near power lines, contact the local electric utility.
Crane and Derrick
Working close to Entergy's energized electrical facilities is dangerous and can result in death or serious injury. Know and comply with all Occupational Safety and Health Administration regulations that apply to your operations.
Federal laws stipulate that if cranes or derricks will be working inside a 20 ft. clearance zone from high-voltage lines (50 ft. from lines over 350 kV), the operator must notify the utility company to determine the voltage of the energized lines affected. The utility company must provide the voltage information within two working days of being notified. A specific work plan must be developed by the operator to ensure no encroachment into the clearance zone occurs. The work plan must include constant monitoring of work site activity by the operator and must be agreed to by the utility company before work begins.
For other contractor and private or public party activities, federal law stipulates at least 10 ft. of clearance at all times from high-voltage lines. State and local laws can be even more restrictive. The higher the voltage in the lines, the greater the clearance requirements (refer to Table A below).
Up to 50kV – 10 ft.
Over 50kV to 200kV – 15 ft.
Over 200kV to 350kV – 20 ft.
Over 350kV to 500kV – 25 ft.
Over 500kv to 750kV – 35 ft.
Helpful rules to follow:
- Know and comply with all OSHA regulations that apply to your operations.
- Call your local one-call utility locator service for clarification on specific clearance requirements.
- If you will be working near power lines, notify your electric utility in advance to determine the voltage and safe work distances, and to find out if special safety arrangements are required.
- Construct a portable barrier to keep workers a safe distance from overhead lines.
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