EE WAS HANGING HIGH VOLTAGE CABLE FROM THE ROOF OF THE MINE WITH INSULATED HOOKS. AFTER HANGING THE HIGHLINE HE FELT PAIN IN HIS BACK. HIGH VOLTAGE CABLE IS HEAVY, STIFF AND AWKWARD TO HANDLE. HE WAS LIFTING THE CABLE FROM THE MINE FLOOR TOLOCATION ABOVE HIS SHOULDERS. NO DAMAGE TO MININEQUIP. OCCURRED. INJURY DID NOT INVOLVE ANY COMPLIANCE WITH RULES/REGULATIONS OR IMPAIR OPERATIO