Just finished tests running my 50 amp plasma torch off 208 single phase with the air compressor running. This is an inverter type machine which means highly reactive power, diodes first rectify the AC, charging a large capacitor bank. This causes a leading power factor. When the compressor is running, it's power factor is lagging since it is inductive, nameplate is 0.8 power factor.
I set the plasma torch to maximum, digital readout indicated 51 amperes. Plasma typically runs 90 to 100 volts open circuit, a lot of power through the 12 AWG 2 conductor . The machine ran like on utility power, cutting 3/8" stainless about a clean as can be expected. Before, the arc would cut for 4 seconds, then extinguish for a second before restriking. And the engine speed would be all over the map.
This Lima MAC generator is well suited to both types of reactive loads with the output current induced rotor field. As output current increases, rotor current also increases which increases magnetic field in the rotor, offsetting voltage drop. No automatic voltage regulator can compare in reaction speed.
Now I have unlimited metal cutting up to 1/2" sever, 3/8" clean cuts. Easier to set up than oxyacetylene torch, I have 50 feet of 10 AWG extension cord and air hose. The inverter is only 12 pounds. Plus it cuts all metals, not just carbon steel.