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Mobile home assembly line worker is electrocuted in Ohio, August 13, 1985.

NIOSH 1985 Aug; :1-5
On August 13, 1985, a mobile home assembly line worker was electrocuted when he came in contact with the exterior of a mobile home (home 1) that was electrified because of a short in the wiring of another mobile home (home 2) on the assembly line. The victim was employed by a mobile home manufacturing firm that employed about 95 laborers. Four workers were in the process of installing the metal roof on home 1 at the metal roof station of the assembly line. After the electrical system has been installed, electrical power is connected to mobile homes on the assembly line. Home 2 had a hot to ground short due to an exterior nail which pierced the wiring in the wall; the ground wire was not connected. Line roll chains connected the metal frames of these homes, so that the metal exterior of home 1 was electrified. The victim attached a vise grip clamp to the edge of the metal roof, and grabbed a come/a/long to connect it to the clamp; he provided a path to ground and was electrocuted. The 1080 volt dielectric strength test was being used on the assembly line at the time of the incident. This test, performed prior to the incident, did not locate any shorts in home 2. In this case the hot to ground short could have occurred after the test was performed, because exactly when the short occurred was never established. Recommendations include enforcing regulations for grounding of mobile homes and using the 900 volt dielectric strength test between live parts and the mobile home ground after all exterior screws and nails are in place.
NIOSH-Author; Region-5; FACE-85-41; Electrical-hazards; Prefabricated-metal-buildings; Factory-workers; Electrical-shock; Accident-analysis; Assembly-line-workers;
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Fatality Assessment and Control Evaluation; Field Studies
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Division of Safety Research, NIOSH, U.S. Department of Health and Human Services, Morgantown, West Virginia, Report No. FACE-85-41, 5 pages