We did a project in Saudi Arabia where we took their 480V three phase and converted it to three 240V EquiTech balanced power supplies, and I believe we used Middle Atlantic 240V PDUs. I'll check with one of the other guys and report back here.
But along the way we found that whoever supplies the PDUs would be able to tell you about the proper plugs to use, and the amps should come with the proper plugs on their power cords anyway. Which IEC end gets used depends on the current rating of the power amps.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw