Abstract: Three electricians were replacing lighting fixtures on three floors of a hospital under construction. On the second and third floors, they deenergized the lighting circuits before they connected the fixtures. On the fourth floor, the supervisor left for a short time to check the blue prints. He instructed the other two employees to prepare the fixtures for installation. While the supervisor was gone, the two employees, a journeyman electrician and an apprentice, started to connect a fixture without deenergizing the lighting circuit. The electrician was electrocuted, apparently when he contacted an energized conductor.