OSHA Accident Investigation · Summary #966978
ADVANCE SIGNS & DESIGNS INC.
ESCONDIDO, CA·
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 Male
- Nature of injury
- Electric Shock (10)
- Part of body
- HAND(S) (12)
- Accident type
- SHOCK (13)
- Source of injury
- ELEC APPARAT/WIRING (15)
- Occupation
- Not specified mechanics and repairers (549)
- Human factor
- MISJUDGMENT, HAZ. SITUATION (1)
- Environmental factor
- OTHER (18)
- Task assigned
- Task not regularly assigned (2)
Labels are OSHA's own, from the code dictionary published with the accident-investigation file. The raw code is shown beside each one so this page can be reconciled against OSHA's bulk data. OSHA notes that nature of injury, part of body, source of injury and accident type in this file are not coded to the Occupational Injury and Illness Classification System, and that the occupation titles are not standardised — so these values are not directly comparable with the OIICS-coded severe injury reports.