On 12/2/2010 13:42, Darren Bolding wrote: > One thing to be aware of- if you are going to be connecting gear with bigger > current draws- Cisco 6509's, most blade enclosures etc. come to mind- then > many of them effectively require 208V C19 connectors.
Even smaller stuff like a 2U server will have multiple ratings on the PSU these days: you will only get full capacity out of it at high voltage. Plus, almost any modern PSU will run at higher efficiency compared to 120V. > There are not as many power strips out there that provide sufficient numbers > of C19 connectors as would be desired, particularly if you want remote > switched power. > > In that case 3 Phase power becomes more attractive. Since many datacenters > are moving towards consolidation on Blades with SAN backend storage, it is > worth keeping in mind. > Most blade enclosures can be found with three-phase power supply options as well, making it even more convenient. When they take three-phase directly it's usually a pair of 20A circuits and you're good for full capacity. ~Seth
