Hello gshuma, I would tend to agree with Lawrence as far as the choice of an inverter welder over a conventional/traditional type machine. I believe there is a term referred to as power factor that governs the efficiency of electrical products, the inverters have an almost zero loss of efficiency in their power ratings, thus you'll get more "bang for the buck" as far as power in and power out. From what you're describing as your general welding needs, a machine in the 200 amp range would probably do nicely for you and would have a minimal amp draw, particularly if you are supplying it with 3 phase power in the 208 to 230 volt range. Just my $.02 Regards, aevald P.S. Take a look at the specs on a Miller Maxstar 200DX for instance, at 175 amp output being supplied with 230 volt, 3 phase power, the machine draws 10.5 amps on the input power