ELECTRICAL at Quikrete Construction Materials, LLC
Electrician's were attempting to engage a 4160 breaker, throw would not move, risk analysis determined they would have to look at throw. Went upstream to LOTO at power source feed to breaker located in Main Sub, located the power source, Loto'ed the power source. Went back to the ER with the breaker. Opened the box and a employee came in contact with energy inside the box.
U.S. Mine Safety and Health Administration