Hi names greg, I have a weld pack 100, It says I should have a 20 amp breaker. Right now I have a 15 amp at the plug in.It seems to weld at low amps but it kick's out at high amps. I got a 20 amp and the correct wire to fix the amp problem. It seems like I was not getting much penetration. Could my problem been the 15 amp fuse?Appreciate any help. Greg