Abstract: On December 22, 2005, Employee #1 was the building's maintenance coordinator and was removing a shut-off box from a 480-volt, 3-phase circuit bus duct while energized. No other employee was exposed to the hazard although there was a forklift operator working with Employee #1 who was in control of the aerial lift at the time of the accident. No personal protective equipment was being worn or used by Employee #1 at the time of the accident. During the removal process, there was an explosion causing Employee #1 to be blown out of the aerial lift he was working from, and falling approximately 10-ft to 14-ft to the ground. The investigation found the lack of a hazard assessment being performed on this particular job task; the company's safety and health program was deficient involving its lockout and tag out program. Employee #1 sustained second-degree and third-degree burns over 100-percent of his body. Employee #1 died approximately six hours after the incident.