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Fatal Electrical Accident Involving Electrician Apprentice in Arizona, August 15, 2008

On August 15, 2008, a fatal electrical accident occurred in Arizona when a 41-year-old electrician apprentice, with 14 years of experience, contacted a 480-volt electrical conductor while replacing a floodlight ballast. The incident was caused by inadequate management policies that failed to ensure the electrical circuit was de-energized, locked out, tagged, and tested prior to the work. To prevent such tragedies, it's crucial to de-energize power, verify with proper testing equipment, supervise inexperienced workers, and adhere to safe work procedures.

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Fatal Electrical Accident Involving Electrician Apprentice in Arizona, August 15, 2008

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  1. MNM Fatal 2008-13 • Electrical Accident • August 15, 2008 (Arizona) • Copper Operation • Electrician Apprentice • 41 years old • 14 years experience

  2. Overview The victim was fatally injured when he contacted a 480-volt electrical conductor. He was replacing the ballast in a floodlight.

  3. Energized conductor contacted by victim Ballast In-line fuse (the other fuse is inside box and out of view)

  4. Root Cause Management policies and controls were inadequate and failed to ensure that the electrical circuit was deenergized, locked- out, tagged, and tested before work was performed on the circuit.

  5. Best Practices • De-energize power from the circuit and lock out/tag the switch. • Verify that the circuit is de-energized by testing the circuit for voltage using properly rated test equipment. • Closely supervise and monitor persons with limited electrical experience. • Establish and follow safe work procedures when working with less experienced miners.

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