5-NORTH-100 BLOCK POWER CAR. EE WAS RETRIEVING AN EXTRA FUSE FROM THE 100-BLK. POWER CAR TO BE USED IN ANOTHER CAR. HE HAD DE-ENERGIZED THE BOX BUT FAILED TO GROUND THE CABLE. HE INADVERTANTLY CONTACTED AN ENERGIZED COMPONENT. HE WAS SHOCKEDAND KNOCKED TO THE GROUND. INCIDENT RESULTED IN ELECTRICAL BURNS TO BOTH HANDS AND LACERATION OVER RIGHT EYE DUE TO FALL.