When we had to manhandle the beast out of the back of my hatchback, I took off all the cables, as these must have weighed 40lb themselves. Anyway, i unscrewed th connections in the wiring box, without looking what went where. Now of course i cant recall what went where. Anyway there are 5 connections, An 'E' in the centre, top right '440' top left '415' bottom left '400' bottom right '0' I have an ordinary 240Volt outlet, so i cant use to the full potential, but then i rarely weld bridge girders anyway. Can someone please tell me which to wire to, and what the others are for?