GreenIndustryPros.com |

Tree care work presents many electrical hazards. Be sure to keep all tools and equipment at least 10 feet away from overhead power lines. (Photo courtesy of Barbara Mulhern and Wachtel Tree Science & Service.)

Uniform color code

A tree care worker was standing on a ladder using an extended aluminum pole pruner to trim a palm tree. The pole pruner came into contact with an energized power line. The worker was electrocuted.

In another incident, a crew member was in an aerial lift truck using a hydraulic pruner when he came into contact with electrical lines, causing a severe electric arc flash across his chin and neck. The worker, whose clothing and flesh burned, fell unconscious into the elevated bucket. Co-workers promptly lowered the bucket and poured water on him, but repeated attempts at cardiopulmonary resuscitation (CPR) failed to revive him.

These are just two of many examples of electrical-related deaths within the landscape services industry. According to the National Institute for Occupational Safety and Health (NIOSH), employees in this industry are more likely to die from electrocutions (9.8% of their job-related fatalities from 2003-2006) than those in the U.S. workforce overall (4.4% of the job-related deaths during that same period).

Performing tree care work is not the only way employees in our industry may come into contact with potentially deadly electrical current. Other ways include failing to determine the location of underground utilities before digging, digging in areas where underground utilities were incorrectly marked, using an aluminum ladder near overhead power lines, getting too close to power lines with cranes and other equipment, and not regularly inspecting the condition of power tools, breakers, wires and other electrical connections.

“If someone comes into contact with a (live) wire, the person is usually killed,” says Scott Jamieson, vice president for corporate partnerships and national recruiting at Bartlett Tree Experts in Northbrook, IL. Jamieson, who is also a Tree Care Industry Association (TCIA) board member, adds, “Often the wire is not seen. This typically happens in residential areas. Someone trimming the tree doesn’t see the wire.”

What often occurs, Jamieson says, is that a branch saw or pruning pole comes into contact with the overhead wire. “The person may also come into direct contact with the wire. Or, a crane or hand tool touches the wire and the person is electrocuted that way,” he says. Another “killer” when working near overhead power lines, Jamieson adds, is an aluminum ladder. “Most tree professionals use fiberglass,” he notes.

Laurie Erdman, safety manager at The Bruce Company of Wisconsin, says it’s important for landscape contractors to call 811 or their local one-call center before digging to determine the location of all underground utilities. Incorrectly marked underground utilities can cause a problem, she says, as can instances where the utilities aren’t burying their lines deep enough.