Quote Originally Posted by Rambozo View Post
Something funny is going on there. There should never be any current flowing through the ground wire. My initial reaction would be phase issues, except that i know your power is all single phase. With the age of the grinder, I wonder if it had some leakage between hot and ground, maybe metal dust inside. Seems like some kinda ground loop or something. Glad to hear that everything is ok.
Good try but I just put my old impact gun on the bench all metal one and the same, so I used a all plastic drill it welded no problem tried an all metal wood cutting saw and no can weld. So it must have something built in the welder to prevent the welder from getting feedback some how I will let the Everlast team figure it out.