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Workplace Safety

Work Safely

Before Working

Power Equipment

 


Working Around High Voltage Lines

Probably the most potentially hazardous electrical situation in industrial plants and construction sites is accidental contact with overhead wiring. Protection from contact with overhead wiring is provided by ISOLATION, or distance, not INSULATION. The covering you may observe on some overhead lines is a weatherproofing. This coating may become brittle, crack, and fall off. It is not intended to provide insulation from contact.

Operators of equipment such as

  • Backhoes
  • Dump trucks
  • Bucket trucks
  • Booms and cranes

should be especially conscious of overhead wiring.

The hazard of contact is also posed to workers on ladders and scaffolding or those handling or moving any type of long tools or equipment like sections of metal pipe.

   

   
Look for power lines before you begin work. Any power line can be dangerous, but a high voltage line can be particularly hazardous. If you are not sure whether a line carries high voltage, check for transformers. Generally, but not always, power lines above transformers will carry high voltage, and lines below transformers carry low voltage. If there is any doubt, call your local utility and talk to the operating department. In any case, call the utility and let them know you will be working around power lines. Obey all state "call before you work" laws.

When operating heavy equipment around power lines, there is an absolute limit of approach. Under no circumstances should any part of of equipment, a load line, or load be moved into this area unless the power line has been de-energized and grounded. The U. S. Occupational Health and Safety Administration has established the distances which MUST be kept from power lines. These are as follows:

• Lines carrying up to 50,000 volts- 10 feet

• Lines carrying between 50,000 and 115,000 volts- 12 feet

• Lines carrying between 115,000 and 230,000 volts- 16 feet

• Lines carrying between 230,000 and 500,000 volts- 25 feet.

The distance is measured from the outside of the work area to the power line.

You should also exercise caution when working around damaged utility poles or guy wires. Similar hazards are posed by buried cables. These pose special hazards for anyone operating excavation equipment. Before beginning any excavation, call your local utility or other agency responsible for locating buried cable before you dig.



 

Line Location

State One-Call Line Locator Phone Numbers
In the U.S., call 811 or the specific office for your state. Canadian call center numbers are listed at the bottom of the second column.
ALABAMA
Alabama One Call
1-800-292-8525

ALASKA
Alaska Digline, Inc.
1-800-478-3121

ARIZONA
Arizona Blue Stake, Inc.
1-800-782-5348
ARKANSAS
Arkansas One Call System, Inc.
1-800-482-8998

CALIFORNIA
Underground Service Alert North
Underground Service Alert South
1-800-227-2600 for both centers

COLORADO
Utility Notification Center of Colorado
1-800-922-1987

CONNECTICUT
Call Before You Dig
1-800-922-4455

DELAWARE
Miss Utility
1-800-257-7777

FLORIDA
Sunshine State One Call of Florida, Inc.
1-800-432-4770

GEORGIA
Utilities Protection Center, Inc.
1-800-282-7411

IDAHO
Bonner/Boundry One-Call
1-800-626-4950
Digline
208-342-1585
Kootenai County One Call
1-800-428-4950
Shoshone/Beneway One Call
1-800-398-3285

ILLINOIS
Julie, Inc. 1-800-892-0123
Chicago: Digger 1-312-744-7000

INDIANA
IN Undrgrnd. Plant Prot. Srvs.
1-800-230-0495

IOWA
Iowa One Call
1-800-292-8989

KANSAS
Kansas One Call System
1-800-DIG-SAFE

KENTUCKY
Kentucky 811
1-800-752-6007

LOUISIANA
Louisiana One Call System, Inc.
1-800-272-3020

MAINE
Dig Safe System, Inc.
1-888-344-7233

MARYLAND
Miss Utility
1-800-257-7777

MASSACHUSETTS
Dig Safe System, Inc.
1-888-344-7233

MICHIGAN
Miss Dig Utility System, Inc.
1-800-482-7171

MINNESOTA
Gopher State One Call
1-800-252-1166

MISSISSIPPI
Mississippi One Call System, Inc.
1-800-227-6477

MISSOURI
Missouri One Call System, Inc.
1-800-344-7483

MONTANA
Utilities Underground Loc. Center
1-800-424-5555
Montana One Call 1-800-551-8344

NEBRASKA
Diggers Hotline of Nebraska
1-800-331-5666

NEVADA
Underground Service Alert of NV
1-800-227-2600
1-800-632-4949
NEW HAMPSHIRE
Dig Safe System, Inc.
1-888-344-7233

NEW JERSEY
New Jersey One Call
1-800-272-1000

NEW MEXICO
New Mexico One Call, Inc.
1-800-321-ALERT

NEW YORK
Dig Safely New York
1-800-962-7962

NORTH CAROLINA
Utilities Locating Co., Inc.

NORTH DAKOTA
North Dakota One-Call
1-800-795-0555

OHIO
Ohio Utilities Protection Service
1-800-362-2764
OKLAHOMA
Call Okie
1-800-522-6543

OREGON
Oregon Utility Notification Center
1-800-332-2344

PENNSYLVANIA
Pennsylvania One Call System, Inc.
1-800-242-1776

RHODE ISLAND
Dig Safe System, Inc.
1-888-344-7233

SOUTH CAROLINA
Palmetto Utility Protection Svc Inc.
1-888-SC1-PUPS

SOUTH DAKOTA
South Dakota One Call
1-800-781-7474

TENNESSEE
Tennessee One Call System
1-800-351-1111

TEXAS
Lone Star Notification Center:
1-800-669-8344
Texas Excavation Safety System:
1-800-344-8377
Texas One Call System:
1-800-245-4545

UTAH
Blue Stakes of Utah Utility Notification
1-800-662-4111

VERMONT
Dig Safe System, Inc.
1-888-344-7233

VIRGINIA
Miss Utility of Virginia
1-800-552-7001

WASHINGTON
Call Before You Dig
1-800-424-5555

WASHINGTON, D.C.
Miss Utility
1-800-257-7777

WEST VIRGINIA
Miss Utility of West Virginia, Inc.
1-800-245-4848

WISCONSIN
Diggers Hotline, Inc.
1-800-242-8511

WYOMING
One-Call of Wyoming
1-800-849-2476
CANADA:
ALBERTA
Alberta One-Call Location Corp.
1-800-242-3447

BRITISH COLUMBIA
British Columbia: BC One Call
1-800-474-6886

ONTARIO
Ontario One Call Centre Ltd
1-800-400-2255

SASKATCHEWAN
www.sask1stcall.com
1-866-828-4888

QUEBEC
Quebec:Info-Excavation
1-800-663-9228

 

 

 

 

 

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