That brings up a really interesting point: I'm not sure this machine really CAN be used 110v, except maybe under faulty outlet conditions. It's quite confusingly written. Yay for Chinese Engrish...
The manual gives instructions on installing the power cord, but mine came hardwired with an L6-30P/YGA-01 plug (30A250V~)
Under wiring instructions: "All of our machines are either 110VAC or 220VAC. The 110VAC machines will operate at 100V-120VAC and 50-60Hz; the 220VAC machines will operate at 200-240VAC and 50-60Hz."
Back of the machine above the power cord says "INPUT AC 110V-220V"
Under Specifications: "Input voltages: 110-220V, 1-PH, 50/60 Hz.
Input current: 110-220V, 1-PH, 20A.
Duty cycle @ 40C (104F): 60% @ 50A, 110V; 60% @ 50A, 220V"
How can it run 50A, 220v if it's only pulling 20A?!
:EDIT: Amazon link: https://www.amazon.com/gp/aw/d/B0052OX876/
Quote: "The machine has 110V/220V 50/60 Hz dual-voltage capability, but requires the use of a pigtail (sold separately) for use with 110V power."