INJURED EE WAS REPLACING A HUB LINER IN THE NO.1RAW MILL SEPARATOR, USING A 1/2"" ELECTRIC IMPACTWRENCH. WHEN THE WRENCH CORD BECAME HUNG UP THE EE PULLED UP ON THE CORD IN AN ATTEMPT TO FREE T HE CORD. THE CORD CAME FREE AND THE PLUG AT THE END OF THE CORD STRUCK THE EE IN THE TOOTH.