I have a 5kW appliance that normally accepts 3-phase power, but can also run on 220V. The manufacturer indicates that when running on single-phase 220V, to connect 220V hot to all three input phases as shown in the picture below:
I am in the US, however, so I don't have a single 220/240V hot conductor with respect to neutral. How can I power this thing?
Technically I can see that a solution would be to use a 1:1 transformer to turn the two hots into a single 240V phase with respect to neutral, but I am not sure if that is how this kind of appliance is typically powered. What is the normal way to do this?