That sticker only lists 3 phase specs. I am wondering if there are any limitations when running on single phase over 3 phase? I really like the duty cycle on it. 100% at just under 250 amps is fantastic. The cooling solution must be first rate. How is the fan noise? Of course when you get a new toy, work gets in the way of being able to spend much time with it. I look forward to your first impressions when you get a chance to put it through it's paces.