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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 170272066 - Burn - Electrical Fault In Busway Switch

Accident: 170272066 -- Report ID: 0112000 -- Event Date: 01/01/1990
InspectionOpen DateSICEstablishment Name
30008134603/01/20001731R.G. Bigelow Electrical Company, Inc.
An electrician was installing a busway disconnect switch onto an energized 480-volt three-phase busway. Although the supply side of the switch was energized, the secondary side was not because he had not yet inserted the fuses. The electrician was using a metal Allen wrench to tighten the load-side conductor lugs. The door to the busway switch enclosure was open and the operating handle was in the closed position, which would energize parts such as the line-side fuse-holders. He had connected the load-side phase conductors and was tightening the lug for the neutral conductor. The employee apparently left the Allen wrench in the lug. As he turned around to adjust the position of the aerial lift from which he was working, the Allen wrench apparently fell out of the lug and caused an electrical fault. The ensuing electric arc burned the employee. He was hospitalized for his injuries.
Keywords: burn, electric arc, e gi iv, electrical, electric switch, electrician, electrical work, lockout, electrical fault
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Commercial building Alteration or rehabilitation   1
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 300081346 Hospitalized injury Burn/Scald(Heat) Electricians FallDist:
Cause: Installing equipment (HVAC and other)
FatCause: Fire/explosion

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