OSHA Accident Investigation · Summary #966978
ELECTRICAL,ELECTRIC SIGN,E GI VII,ELECTROCUTED,GROUND FAULT,EQUIPMENT GROUNDING,ADVERTISING SIGN,ELECTRIC GENERATOR
Event description
ELECTRIC SHOCK - GROUND FAULT IN ELECTRIC SIGN
Investigation abstract
A sign fabricator was working from an aerial lift, servicing a fluorescent resta urant sign. The employee used an extension cord set to connect a generator to a junction box at the bottom of the sign. The secondary of the ballast transformer for the sign had developed a ground fault, which energized the metal frame of t he sign at 417 to 420 volts. The wiring to the sign from the junction box did no t provide an equipment grounding conductor. The employee was electrocuted when h e touched the sign frame and the boom control handle at the same time.
Victim
-
#1 Fatality Age 30 M
- Nature of injury
- 10
- Part of body
- 12
- Event type
- 13
- Source
- 15
- Occupation code
- 549
- Human factor
- 1
- Environmental factor
- 18
- Task assigned
- 2
Codes shown verbatim from OSHA's accident-investigation database. A human-readable decoder is coming in a future release once the accident_lookup2 dictionary is loaded.