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Occupational Safety and Health Administration OSHA

Inspection Detail

Inspection: 120132451 - Ninteman Construction

Inspection Information - Office: Ca San Diego

Nr: 120132451Report ID: 0950632Open Date: 10/21/1994

Ninteman Construction
San Diego State
San Diego, CA 92115
Union Status: NonUnion
SIC: 1541/General Contractors-Industrial Buildings and Warehouses
Mailing: 4375 Jutland Dr #200, San Diego, CA 92117

Inspection Type:Accident
Scope:Complete Advanced Notice:N
Ownership:Private
Safety/Health:Safety Close Conference:10/26/1994
Close Case:12/02/1994

Related Activity:TypeIDSafetyHealth
 Accident362249443    

Accident Investigation Summary
Summary Nr: 171004831Event: 10/12/1994Electric Shock - Ground Fault In Electric Drill
A construction company was building a basement for a new university library. One of the employees on the site lifted a 240-volt concrete drill (Model DM-1186) so that he could hand it to a coworker. He was standing on dry ground at the time. As he placed his hand on a strongback's steel screw to raise the drill to the coworker, he received an electric shock. He was knocked unconscious, but regained consciousness on the way to the hospital. Two other employees had been using the drill the day before and did not experience any problems. The circuit was examined by Bell Electric Company after the accident. It found that there was insufficient continuity in the equipment grounding conductor between a portable outlet box and its source of supply because of dust and dirt accumulation inside the cable connector.
Keywords: unconsciousness, electrical, e c, ground fault, cord connector, equipment grounding, electric shock, electric drill
Inspection Degree Nature Occupation
1 120132451 Non Hospitalized injury Electric Shock Carpenters

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