OSHA Accident Investigation · Summary #14198527
REPAIR,E GI IV,ELECTRICAL,INSULATED TOOL,ELECTRICAL WORK,INTERLOCK,LOCKOUT,ELECTRIC SHOCK,HAND TOOL,UNTRAINED
Event description
ELECTRIC SHOCK - CONTACT WITH ENERGIZED PARTS THRU TOOL
Investigation abstract
A maintenance supervisor was summoned to repair a Thermonic soldering machine (M then took a small pair of pliers in his right hand (keeping his left hand free) and began adjusting the oscillator tube. He got the unit to cycle one time, but then it malfunctioned again. The employee again took the pliers in his right ha nd to adjust the tube. The handle of the pliers was covered with rubber; however , there was a tiny hole in the rubber at the base of the handle. This time his h and was over the hole in the rubber. The maintenance supervisor rested his arm o n the metal enclosure of the unit while he adjusted the tube. He received an ele ctric shock, which knocked him backward away from the unit. He stood there dazed as the operator notified the assistant production manager of the accident. The maintenance supervisor was hospitalized for his injury. The maintenance supervis odel No. 50, Serial No. 184148). Suspecting that the problem was of an electrica or had been trained in the operating process of the machine itself, but had not been trained to service the electrical portion of the machine. The operator's ma nual and schematics were not available at the worksite. They were maintained at another plant. l nature, the employee removed the top cover of the electrical unit of the solde ring machine. The unit converted 120-volt single-phase alternating current into 6200-volt direct current. The current was then applied to an oscillator circuit, which produced high-frequency power for the soldering process. The unit was pro vided with an interlock to deenergize the equipment when the cover was removed. To bypass the interlock, the maintenance supervisor took a screwdriver and jamme d it into the switch. Suspecting that the short was located in an oscillator, he
Victim
-
#1 Hospitalized Age 34 M
- Nature of injury
- 10
- Part of body
- 12
- Event type
- 13
- Source
- 15
- Occupation code
- 523
- Human factor
- 1
- 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.