Abstract: At approximately 2:36 p.m. on September 2, 2003, Employee #1, of Construction Technologies in Sacramento, CA, was opening an electrical panel to get the identification numbers from the breakers. He was removing the panel cover when it contacted a conductor, causing an electric arc. Employee #1 sustained severe burns to his right hand and arm, and was hospitalized for four days. Subsequent investigation found that the conductor was loose and improperly installed. It was too large to fit in the breaker's connection slot and was also improperly trimmed, leaving frayed strands exposed. When the breaker panel was removed, it contacted the energized conductor.