November 9, 2021 - On November 23, 2020, a miner was electrocuted while troubleshooting a disconnect box for the classifier drive motor. The victim had the electrical disconnect box open, and the main power supply was not de-energized.

Best Practices

• Ensure electrical circuit components are properly designed and installed by qualified electrical personnel.

• Ensure electrical troubleshooting and work are performed by people with proper electrical qualifications. Positively identify the circuit on which work will be conducted.

• Before performing electrical work, locate the visual disconnect away from an enclosure and open it, lock it, and tag it, to ensure all electrical components in the enclosure are de-energized. Verify by testing for voltage using properly rated test equipment.

• Wear properly rated and well maintained personal protective equipment, including arc flash protection, such as a hood, gloves, shirt, and pants.

• Train miners on safe work practices for electrical equipment and circuits.

Miners and mine operators can find safety and health information on MSHA.gov.