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