IN PREPARATION TO BEGIN WELDING, EE LAID HIS ELECTRODE HOLDER ON PLATFORM GRATING. HE WAS IN PROCESS OF CONNECTING THE OPPOSITE END OF THE WELDING WHIP TO THE WELDING LEAD. WHEN THE WHIP MALE END MADE INITIAL CONTACT WITH THE LEAD FEMALE END, A SPARK FLASH OCCURRED & CAUSED A BURN TO EE'S FINGER. EE WAS NOT AWARE THAT THE ELECTRODE HOLDER WAS GROUNDED TO THE GRATING.