Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a couple of Dell Poweredge R200 coloed in the US and thinking to move some of them to Europe. I am wondering if this is possible without modification (regarding 110 vs 230 voltage difference)? I am also not sure what is the amper usage of Dell R200.

share|improve this question
up vote 6 down vote accepted

The Dell R200 has a 100 - 240V auto-sensing power supply. This means you can use the server anywhere in Europe (with the correct power plug). Just plug it in and it will adjust automatically to the voltage.

The amp usage will be approximately the half of your current amp usage in the US. Because the power usage of your server will be the same and P = U * I (Power = Volt * Current).

"345W" in the Dell spec sheet means the power supply can handle a maximum power usage of 345W. This has nothing to do with the average power usage of your server. The average power your server uses depends on the hardware (CPU, Disks, etc..) in the server and the server load. A server which is handling 1000 requests/min uses more power than a server which handles 10 requests/day.

The only way to know the power usage is by measuring. Maybe your current colocater is already measuring the power usage of your server, so you could ask them. You could also guess your servers power usage by Googling power usage of other comparable servers under comparable load.

If you want to have a safe guess you can divide 345W by the voltage. So 345/230=1.5A. This is the maximum amp. Your server will not use more than this. Your server will likely on average use less, because most power supplies can handle more power than the server requires. And your server will not be under full load 100% of the time.

share|improve this answer
Thanks. As for amper usage, I am still a bit unclear. I see in the docs that the powersupply is "345W non-redundant, auto-sensing". So how can I calculate my average amper usage? – alfish May 3 '11 at 11:30
@alfish, to get a very approximate figure simply divide the wattage by the local voltage. – John Gardeniers May 3 '11 at 11:44

This Dell document says that the power supplies are auto-sensing so they should be safe moving from the USA to the Europe.

share|improve this answer

Almost all server gear now uses auto-sensing power supplies, so you do not need to do anything to use the higher, European voltages.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.