To determine your power needs,  go to this link and add a rack, then your servers.  It will give you information on power needs, cooling needs, etc . [URL]   Regards,
Hello, I have a cabinet with four 20A 220V circuits....can someone let me  how many R720xd's (two supplies) we can fit in this cabinet. I've assumed 325W per system, and max power is 32A (assuming all load is carried by just two circuits) 32A*220V = ~7kVA/ 325 ~ 20 systems total??? Thanks   
Max R720xd on a circuit