OSHA Accident Investigation · Summary #14492706
ELECTRICAL,CONFINED SPACE,ELECTROCUTED,E C,GROUND FAULT,EQUIPMENT GROUNDING,SYSTEM GROUNDING,ELEC PORT TOOL--MISC
Event description
ELECTRIC SHOCK - GROUND FAULT IN ELECTRIC GRINDER
Investigation abstract
A JOB SUPERINTENDENT WAS INSTALLING INSULATION ON A STEEL TANK AT AN OIL REFINER Y CONSTRUCTION SITE. HE WAS USING A 120-VOLT ELECTRIC PENCIL GRINDER TO GRIND RU ST OFF THE TANK SO THAT PINE COULD BE TACKED TO THE TANK TO HOLD THE INSULATION. WHEN THE STEP-DOWN TRANSFORMER WAS CONNECTED TO THE 480-VOLT, THREE-PHASE-DELTA POWER SUPPLY, THE EQUIPMENT GROUNDING CONDUCTOR BECAME ENERGIZED AT 480 VOLTS. (THE REPORT DID NOT STATE WHEN THIS CONNECTION WAS MADE.) WHEN THE EMPLOYEE'S RI GHT ARM TOUCHED THE METAL TANK WITH THE GRINDER IN HIS LEFT HAND, HE WAS ELECTRO CUTED.
Victim
-
#1 Fatality Age 34 M
- Nature of injury
- 10
- Part of body
- 2
- Event type
- 12
- Source
- 15
- Occupation code
- 558
- Human factor
- 17
- Environmental factor
- 18
- Task assigned
- 1
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.