Abstract: A power line crew was replacing a broken lightning arrester on the bus work for a transformer in a substation. The supervisor on the crew permitted a truck driver/equipment operator (who was not a qualified employee) to assist in the replacement. The truck driver, who was not wearing any electrical protective equipment or any eye protection, was standing on a fiberglass ladder about 15 to 18 feet above the ground. He was working on the energized (southwest) side of the transformer near a 24-kilovolt switch. A power line worker was working from a Pittman aerial lift on the deenergized (northwest) side of the transformer. The truck driver reached up with his right hand to point out a bolt on the lightning arrester base, which he thought would be hard to remove. As he did so, his elbow contacted the switch. The employee was electrocuted.