2018 is turning out to be a devastating year in our industry. The frequency of energized contacts, flashes, severe injuries and fatalities continues to increase. Why – in a professional trade that requires such an extensive amount of apprenticeship time – do lineworkers have such high incident and accident rates?
In this installment of “Voice of Experience,” I want to review two accidents I am familiar with so that we can dive into why they happened, and how you can prevent them from happening on your job sites.
The First Accident
In the first accident, a journeyman lineman lost his right arm to the shoulder. The immediate cause was a 7.2-kV electrical contact phase to ground.
The day of the accident, the journeyman was running a little late, so he drove his personal vehicle to the job site to avoid losing more time. An apprentice lineman had driven a bucket truck to the job site for the journeyman to use. All employees gathered to discuss the job plan. The job, which had been in progress for several days, was reconductoring approximately 5,000 feet of an existing three-phase 12.4-kV line from #2 ACSR to 397 MCM. New poles were set, and old conductors were spread on layout arms. The new conductors had been pulled in and sagged to tension the day before. The day the accident occurred, there was discussion during the job briefing about moving the new conductors from roller blocks and tying them in on the new insulators with preform ties. The structure where the incident occurred was a 45-foot Class 3 with a 10-foot wood arm. Insulated layout arms were mounted on the ends of arms. The middle and field-side phases were set to the field side of the arm. The existing energized road-side phase was on a short arm set to the road side of the pole. All three of the old phases were still energized. The new conductors had system safety grounds installed on each end, as required by standards.