EE WAS REACHING IN THE DECK OF A BATTERY CAR TO GET A SAFETY CHAIN THAT WAS TO BE INSTALLED BETWEEN THE BATTERY CAR AND A 15 TON MOTOR. IN DOING SO HE CONTACTED A CABLE THAT WAS PART OF THE WI RING CIRCUIT FOR AN EMERGENCY STOP BUTTON ON THAT BATTERY CAR. IT APPEARS THERE MUST HAVE BEEN A BARE PLACE IN THAT CABLE, AND WHEN HE CONTACTED THAT CABLE HE PUSHED IT AGAINST THE METAL FRAM