I'm thinking of getting the Cooler Master V1200 Platinum PSU (http://www.coolermaster.com/powersupply/v-series/v1200/) to power 3 S3s would that run fine? Everything is going to be on stock, no tweaks whatsoever. I just need something that can power them reliably.

Also, a pretty noob question... The datacenter I am looking at provides 6 x power sockets of 13Amp over 220V each in the cabinet. Does this mean that in total I can put equipment that consumes approximately 12000~ watts of power usage without tripping anything? Or should that be ~2000W?

Cheers