There is a Hobart Arc Master 500 available for sale in my area for a good price, and I was considering picking it up. I got a copy of the manual, including schematics, from Hobart, and while it is a three-phase machine, it appears that it might run on single-phase power, if connected to the L1 and L2 inputs. Can any of you advise on this? I've included an excerpt from the manual, showing the AC input section of the machine.