OSHA Accident Investigation · Summary #14510903
SENIOR DRILLING COMPANY INC RIG 40
CARMINE, TX—
Event description
ELECTRIC SHOCK - GROUND FAULT IN PUMP MOTOR
Investigation abstract
A SKID-MOUNTED TRIPLEX PUMP DRIVEN BY A 3-HORSEPOWER ELECTRIC MOTOR WAS TO BE US OR WINDINGS, AND THERE WAS ELECTRICAL CONTINUITY BETWEEN THE MOTOR CASE AND THE METAL NOZZLE THROUGH THE HOSE. ED IN THE CLEANING OF A DRILLING RIG. THE MOTOR WAS SUPPLIED BY A 3-CONDUCTOR, 2 40-VOLT GROUNDED CIRCUIT. THE DRILLING RIG WAS CLEANED WITH HIGH PRESSURE WATER FROM THE PUMP, CALLED THE RIG WASH-DOWN PUMP. AN EMPLOYEE HAD BEEN SCRUBBING THE RIG WITH A SCRUB BRUSH AND SOAPY SOLUTION, AND HE WAS VERY WET. AFTER HE FINISH ED SCRUBBING, HE PICKED UP THE METAL PUMP HOSE NOZZLE. WHEN HE TURNED ON THE ELE CTRIC POWER, HE WAS ELECTROCUTED. INVESTIGATION REVEALED THAT THE GROUNDING COND UCTOR IN THE SUPPLY CORD FOR THE PUMP MOTOR WAS NOT CONTINUOUS FROM THE RECEPTAC LE TO THE PUMP MOTOR. ADDITIONALLY, THE MOTOR CASE HAD SHORTED TO THE MOTOR STAT
Victim
-
#1 Fatality Age 40 M
- Nature of injury
- 10
- Part of body
- 4
- Event type
- 13
- Source
- 15
- Occupation code
- 999
- Human factor
- 9
- Environmental factor
- 18
- Hazardous substance
- 8870
- 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.