What happens if you plug them with the wires energized? When you plug the first and then the second.. I don't think this should be done, but given how some people operate their mines...
Next experiment; Would it turn on if you used two 120v from different phases (would it get the 208v from the two hots?). Theoretically speaking, of course, don't try this at home, in the name of science.
Yea i want to know, since it has two plugs, what happen if you plug directly one cable first to power point (the psu wont turn on?) and then the second cable (then the psu turn on?), so no need PDU switches.