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Guy wires and power lines can be a deadly mix, OSHA warns

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Photo: OSHA

Washington — Spurred by a number of deaths in which a guy wire being worked on contacted an energized high-voltage power line, OSHA has issued a hazard alert.

In some of the cases, OSHA says its investigations revealed that the guy wires “weren’t grounded and had insulators positioned incorrectly.”

Guy wires are installed on poles for support. According to the agency, workers on the ground can be exposed to electrical hazards when:

  • Installing a new guy wire on a pole with energized lines.
  • Adjusting the tension to remove slack from a guy wire.
  • Replacing a guy wire after an incident or natural disaster.

“To protect employees, guy wires must be either effectively grounded or have properly positioned insulators to block the flow of electric current,” OSHA says.

The alert features illustrations on proper and improper positioning of insulation on guy wires.

“OSHA recommends employers follow relevant guidelines in consensus standards, such as the National Electrical Safety Code (IEEE, NESC-C2), which recommends ungrounded guy wires have insulators installed to prevent electric current from traveling down the guy wire to below 8 feet above the ground level,” the alert states.

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John Gilginas
November 17, 2023
great article. This may be out of scope for the regulation, but guy wire hazards also have impacts to the public. Damaged or improperly placed guy wires, anchors and insulators have caused incidents. A proper hazard reporting system, inspection program and auditing program can help reduce the risk.

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Mark Voigtsberger
November 19, 2023
John's comment is exactly right. My firm performs electrical safety inspections for utility companies across the US and there are indeed a large number of incorrect guy wire installations- most often we find the guy wire is fastened to the pole above the phase conductors with no protection at all below the electrical utility zone followed by guy wires that have developed slack or are disconnected from their anchor point in the earth. This is what this OSHA alert is warning about and we can confirm the issue on a larger scale. Third largest problem on our list- we frequently see a particular type of insulator commonly called a "Johnny Ball" not properly installed that can cause them to degrade or fail. We have addressed a similar issue with electrical faults on metal streetlights and traffic signals. These faults are also very common- often we find hundreds of electrical faults when we safety survey a city for these objects. The question we have asked in the past is, but have never received a clear answer on, are these streetlights and traffic signals to be considered part of the workplace for the men and women who maintain these devices? If so, then OSHA rules should apply. But to John's point- utilities often only become aware of these problems when an innocent pedestrian or dog is injured or killed rather than a worker who typically is wearing the correct PPE or is in an insulated bucket truck.