Xcel Energy Tips of the Trade

Are Overhead Power Lines Insulated? NO!

Call 811 Before You Dig

To reach your state’s underground utility service/one-call center, call 811.

The required “business day” (excludes weekends and holidays) wait time for each state is as follows:

• Colorado: 3 days
• Michigan: 3 days
• Minnesota: 2 days
• New Mexico: 2 days
• North Dakota: 2 days
• South Dakota: 2 days
• Texas: 2 days
• Wisconsin: 3 days

In Case of Emergency, call 911 and Xcel Energy:

• Electric emergencies:
• Natural gas
• Colorado (PSCo) only:
   Gas Transmission
   Pipeline Emergencies:


Power Lines Are Not Insulated
Most overhead power lines are made of highly conductive aluminum with a steel core and they are NOT insulated. If you look up at a utility pole or tower, you may not be able to identify which lines are communication cables and which are energized wires. For your safety, always assume that any wire on a utility pole or tower is energized and dangerous, and stay away. All downed wires should also be considered energized and dangerous—stay far away from them as well.

Don’t Be Fooled by the Covering
Don’t be fooled by the covering on the electric service lines that go from utility poles to homes. This coating is designed to protect the line from the elements, but it is not true insulation and will not prevent injury to people. This covering will NOT protect you from electrical shock.

Distance Is Your Best Protection
Keep yourself, your tools, and all equipment at least 10 feet away from overhead power lines carrying up to 50 kV. And if you are using cranes or derricks in construction, keep equipment at least 20 feet away from lines carrying up to 350 kV and 50 feet away from lines carrying greater than 350 kV. Use tape, signs, or barricades to mark a clear safety boundary. As needed, contact Xcel Energy’s Builders Call Line during business hours at 800-628-2121 to confirm the power line voltage and distance requirements.

Higher Voltage Lines Require Greater Clearances
As voltage increases, clearance distances also increase. Consult the OSHA regulations at www.osha.gov for specific safety clearance requirements or call Xcel Energy.

Would You Like to Know More?
Additional overhead line safety tips, case studies, instructional videos, and training tools can all be found, at no charge to you, on Xcel Energy’s e–SMARTworkers website.

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