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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 200776458 - Employees Are Injured By Electrical Burn

Accident: 200776458 -- Report ID: 0134000 -- Event Date: 02/05/2011
InspectionOpen DateSICEstablishment Name
31529809103/01/20111731Nardone Electrical Corporation
On February 5, 2011, Employee # 1 and Employee # 2 were employed by Nardone Electrics. Employee # 1 and Employee # 2 were installing a replacement of an Automatic Transfer Switch (ATS) and related components for a building Uninterrupted Power Supply (UPS). The generator system failed which led to a transfer of building power to the UPS. Employee # 1 and Employee # 2 installed temporary wiring (welding leads) to bypass the ATS to provide continued power to the computer systems. After the workers completed the ATS replacement they turned the main switch on the Main Service Switch (MSS) panel to OFF and begin pulling the three phase permanent wiring into this cabinet. The grounding wire came in contact with energized 480 volt bus bars behind and above the main switch causing an arc flash. Employee # 1 and Employee # 2 sustained electrical burns.
Keywords: electric arc, electrician
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Other building New project or new addition $50,000 to $250,000 1 8
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 315298091 Hospitalized injury Burn/Scald(Heat) Occupation not reported FallDist:
FallHt:
Cause: Interior plumbing, ducting, electrical work
FatCause: Electric shock, other and unknown cause
2 315298091 Hospitalized injury Burn/Scald(Heat) Occupation not reported FallDist:
FallHt:
Cause: Interior plumbing, ducting, electrical work
FatCause: Electric shock, other and unknown cause

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