Normally there is a power threshold measured in Kilowatts or amps on your cabinet. Amps is generally easier to work with. 16A or 32A would be pretty standard. R

Normally there is a power threshold measured in Kilowatts or amps on your cabinet. Amps is generally easier to work with. 16A or 32A would be pretty standard. Really, you need to ask your colo facility. Be careful with a 32 amp A & B feed if you're using them for redundancy. Ideally you don't want to overload the A or B feed if one of them is down. The advice given to you regarding Dell servers is pretty good. They also have a power estimator on their website which you can download which give really good indicators as to what your power usage might be. Basically, the chances are you wouldn't be able to pack 42 1u servers into a 42U cab and power is becoming more and more of an issue. Extra note: newer generation dell servers are much less hungry than the old ones. The PE 2950's are great 2U machines, easy to work with and I'd vote for them over the equivalent 1U form factor 1950s from my experience.