Originally Posted by
in2steam
John,
Quite frankly if you are not comfortable with 110 then you are not comfortable with 220. They are just as dangerous, and in several ways lower votlages are worse. But enough of my high horse, my simple solution was to go over to friends house and use his welder mainly because the winter here was so harsh that I just started to see my driveway early this weekend. My landlord asked that i weld outside, and who am I to argue its his house. This was of course after I went out and bought the plugs and cording. You can find the female plug at any home depot, you will need a 4x4(deep) box if they don't have a self contained end, mine was, the male plug was a little harder to find but once I found it I was set, I think I ended up going to Lowes, but i don't remember anymore, they still are around you just have too look I spent around $60 if memory serves. Your third prong(on welder), and I will not say that this is a 100% for sure, is for the ground not neutral, you should look inside the welder and see how the wires terminate, the ground wire will screw to the body shortly after the cord comes inside. Hooking to the neutral in all likely hood will do nothing(as most are grounded anyway), but could be a problem if there is a short on one hot leg only. The other problem is that if you ground your machine to the neutral run the chance of getting zapped from feedback through the chassis.
On older equipment it was very commmon to see all black wires, or all red, or all green, or all blue, or any mix, the green ground standard is normally true but don't assume. There should also be a plate on the inside showing the wiring diagram ther almost always is. The fourth prong(on new style) is for the ground, you can ground to the conduit of your outlet if its run to the box and if that box is grounded. If not then I don't recommend it, alot of houses built since 1960 have just nomex(unless you can get at the nomex ground) or partial(conduit ends above a certain point), so be sure. Most electrical items don't need a ground, untill of course they short out, the nice thing about 220 vs 110 is that the circuit is double break, the bad thing is that its got nowhere to go should the ground fault happen while you are hold the electrode. I personally would not trust an older piece of equipment in such a setup you run alot more risk of problems. My miller is only a couple years old and has about 5 minutes on it.
Also old welders(this depends upon the style also) and generators don't get along real well, the inrush will most likely trip your circuit breaker at 6500 watts.
chris