Man....you guys made me just realize something.....I have a Millermatic 185 which draws a max of about 28 amps per leg....that means, at max rating, that the RED and BLACK have 28 amps each humming thru them........so what do you think the WHITE return wire has going thru it during those times? Yep. 56 amps. Now you can bet which wire is getting the hottest and is most likely to burn up.