Powered by GoogleTranslate

Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 201521234 - Burn - Electrical Fault In Switchboard

Accident: 201521234 -- Report ID: 0111500 -- Event Date: 04/09/2001
InspectionOpen DateSICEstablishment Name
12330352104/10/20011731Gunzy Electric Incorporated
An electrical contractor dispatched an electrician and an apprentice to a town center mall to repair a defective 200-ampere fusible disconnect in a low-voltage main distribution switchboard. In preparation, the employees deenergized a 200-ampere electric power and lighting panelboard located on the second level of the mall. The panelboard was fed by the defective disconnect, which had an open pole. Next, the electrician (Employee #1) opened the disconnect switch, disconnected the load-side 3/0 AWG conductors, and reconnected then to a 400-ampere disconnect in an adjacent section of the switchgear. The electrician discovered that the A-phase internal bus hardware of the defective 200-ampere switch, including the fuse holder, was discolored from long-term overheating. This was similar to a problem he had encountered less than a month ago at another 200-ampered fusible disconnect within the same low-voltage switchboard. The problem with that disconnect, which was directly above the disconnect on which he was working that day, was also on the A-phase. Upon completion of these tasks, the electrician closed only the 400-ampere disconnect and called his employer to explain what he had found. The employer (Employee #3) and the mechanical superintendent of the mall (Employee #2) met the electrician at the switchboard. After explaining to them his findings and making a recommendation to replace the defective switches or to consider upgrading the entire service entrance switchgear, the electrician closed the door to the switch he had deactivated that day. As he was closing the door of the other defective switch, an electrical fault occurred. The ensuing electric arc burned the two employees and the employer and knocked them to the floor. They were able to crawl out of the room. The two employees were hospitalized for their injuries.
Keywords: burn, electric arc, electrical, switchboard, e gi vii, electrician, electrical work, equipment failure, electrical fault
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Commercial building Maintenance or repair Under $50,000
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 123303521 Non Hospitalized injury Burn/Scald(Heat) Electricians FallDist:
FallHt:
Cause: Interior plumbing, ducting, electrical work
FatCause: Fire/explosion
2 123303521 Hospitalized injury Burn/Scald(Heat) Mechanical engineering technicians FallDist:
FallHt:
Cause: Interior plumbing, ducting, electrical work
FatCause: Fire/explosion
3 123303521 Hospitalized injury Burn/Scald(Heat) Electricians FallDist:
FallHt:
Cause: Interior plumbing, ducting, electrical work
FatCause: Fire/explosion

Thank You for Visiting Our Website

You are exiting the Department of Labor's Web server.

The Department of Labor does not endorse, takes no responsibility for, and exercises no control over the linked organization or its views, or contents, nor does it vouch for the accuracy or accessibility of the information contained on the destination server. The Department of Labor also cannot authorize the use of copyrighted materials contained in linked Web sites. Users must request such authorization from the sponsor of the linked Web site. Thank you for visiting our site. Please click the button below to continue.

Close