OSHA Accident Investigation · Summary #14332498
BURN,CLOTHING,VOLTAGE BACKFEED,ELECTRICAL,E PTD,SUBSTATION,ELEC UTILITY WORK,ELECTRIC SHOCK
Event description
ELECTRIC SHOCK AND BURNS - VOLTAGE BACKFEED IN SUBSTATION
Investigation abstract
THREE EMPLOYEES WERE CLEANING THE MAIN LUGS IN SUBSTATION 11 IN PREPARATION FOR KFEED OF 13 KILOVOLTS ENERGIZED THE LUGS ON WHICH THE EMPLOYEES WERE WORKING, SH OCKING AND BURNING ALL THREE EMPLOYEES. TWO OF THEM WERE HOSPITALIZED WITH SECON D DEGREE BURNS TO THEIR LEFT HANDS AND ARMS. THE OTHER EMPLOYEE RECEIVED FIRST D EGREE BURNS TO HIS LEFT HAND. THE TYING IN OF A FEEDER TO SUBSTATION 12. THE MAIN POWER SWITCH TO THESE TWO SU BSTATIONS AND TO SUBSTATIONS 13 AND 14 HAD BEEN OPENED AND LOCKED OUT. HOWEVER, IN ORDER TO MAINTAIN POWER TO A PLANT AIR COMPRESSOR, A CIRCUIT BREAKER IN SUBST ATION 14 WAS TO BE PROVIDED WITH TEMPORARY POWER FROM ANOTHER SUBSTATION. THIS C IRCUIT BREAKER WAS SUPPOSED TO BE OPEN TO PREVENT BACKFEED TO THE FOUR DEENERGIZ ED SUBSTATIONS. THE SUPERVISOR FOR THESE EMPLOYEES CHECKED THE CIRCUIT BREAKER A ND FOUND IT TO BE OPEN. UNFORTUNATELY, HE HAD MISREAD THE INDICATOR DUE TO INADE QUATE ILLUMINATION. WHEN THE TEMPORARY POWER SUPPLY WAS CONNECTED, A VOLTAGE BAC
Victims (3)
-
#1 Hospitalized Age 38 M
- Nature of injury
- 5
- Part of body
- 12
- Event type
- 13
- Source
- 15
- Occupation code
- 577
- Human factor
- 4
- Environmental factor
- 14
- Hazardous substance
- 8870
- Task assigned
- 1
-
#2 Hospitalized Age 40 M
- Nature of injury
- 5
- Part of body
- 12
- Event type
- 13
- Source
- 15
- Occupation code
- 577
- Human factor
- 4
- Environmental factor
- 14
- Hazardous substance
- 8870
- Task assigned
- 1
-
#3 Non-hospitalized injury Age 39 M
- Nature of injury
- 5
- Part of body
- 12
- Event type
- 13
- Source
- 15
- Occupation code
- 577
- Human factor
- 4
- Environmental factor
- 14
- 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.