On November 23, 2020 (at a mine in Houston, TX with 12 employees*), a (39 year old Maintenance Mechanic with 1 year 7 weeks experience*) 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 deenergized.
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.
Additional Information:
This is the 26th fatality reported in 2020, and the second classified as “Electrical.” (* Italicized details added by safeminers.com from MSHA data)
Click here for: Preliminary Report (pdf), Final Report (pdf).