To tell you the truth im not doing it exactly to code lol !! Im actually just using industrial grade 120 volt outlets that the power supplies can directly plug into with out having to chop the cords and put a huge 240 volt plug on it !! Each power supply dont pull that much current, not nothing like a dryer would so you can get away with it. So basically the 120 volt outlets will just be supplied with 240 volts instead of 120. Just make sure you make it clear that its 240 volt plugs dont plug in a 120 volt fan or anything on accident lol ...
They do make
North-American 240V power connectors that are not much larger than the 120Volt connectors. Not sure what premium the power supply cables with a 240V plug would carry though (If you are an electrician, you would be able to just replace the plug).
Somebody up-thread was talking about 2 30 Amp PDUs on a 50Amp breaker. I suspect it would not be too hard to find a 20Amp breaker for one of the PDUs.