EE WAS REPAIRING BOLTER CABLE THAT HAD BEEN CUT BY A CAR. AT POWER CENTER HE PUT HIS LOCK & TAG ON BOLTER CATHEAD AND SPLICED THE CABLE. WHEN FINISHED, HE TOOK HIS LOCK & TAG OFF & PUT THE CATHEAD BACK ON THE POWER CENTER. TRIED 3 OR 4 TIMES TO RESET THE BREAKER - WOULD NOT RESET, SO HE REACHED DOWN TO TAKE THE CATHEAD OFF WHEN THE BREAKER BLEW UP ON HIM.