D DanMan New member Jan 4, 2011 #1 I am just wanting to know if a mig welder would be classified as a resistance welder per NEC 630? Need to make sure so I can size the supply conductors correctly.
I am just wanting to know if a mig welder would be classified as a resistance welder per NEC 630? Need to make sure so I can size the supply conductors correctly.
S stew Senior Member Location federal way,washington Jan 4, 2011 #2 nearly all mig welding power sources are transformer rectifier units.
iwire Moderator Staff member Location Massachusetts Jan 4, 2011 #3 I agree with stew and will add resistance welders are spot welders and variations of that method.