Computer Center Load Calcs.

[A-1Sparky]

Just wondering if there is a generally accepted industry standard as far as calculating computer loads goes when you don't have the specs. for the equipment. I've always gone with a 3 amps per computer rule of thumb, and have never had an issue. I was told recently by a computer guy (read geek ) that I'm overestimating the loads, as new computers draw much less current. I still think that my 3 amp estimate is reasonable, but I learn something new every day. Any thoughts? Thanks.

 

[Besoeker]

Just wondering if there is a generally accepted industry standard as far as calculating computer loads goes when you don't have the specs. for the equipment. I've always gone with a 3 amps per computer rule of thumb, and have never had an issue. I was told recently by a computer guy (read geek ) that I'm overestimating the loads, as new computers draw much less current. I still think that my 3 amp estimate is reasonable, but I learn something new every day. Any thoughts? Thanks.

Presumably at 120Vac?
So 360VA. I would have thought that reasonable. Particularly if you consider the monitor, printer, even if shared, and any other peripherals.

 

[A-1Sparky]

Yes, these are all 120v loads.

 

[jeremysterling]

The good news is your tech friend is right about the low power draw.:thumbsup:

The bad news is the nameplate on the computer usually says 5A.:thumbsdown:

I've heard of a 4 workstations per 20 amp circuit rule of thumb, but that usually means ignoring nameplates and is not what I would call an industry standard.

 

[A-1Sparky]

That's actually what is being proposed for this project...4 work stations per 20 amp circuit. I gave my blessing, but was curious about how others treated computer loads. Thanks for the replies, guys.

 

[maghazadeh]

Computer Center Load Calcs.

Just wondering if there is a generally accepted industry standard as far as calculating computer loads goes when you don't have the specs. for the equipment. I've always gone with a 3 amps per computer rule of thumb, and have never had an issue. I was told recently by a computer guy (read geek ) that I'm overestimating the loads, as new computers draw much less current. I still think that my 3 amp estimate is reasonable, but I learn something new every day. Any thoughts? Thanks.

A-1 Sparky, Are you looking for PC's load (personal computer)? if so then other has responded well, however, there are some engineers in one office cube with as many as 3 to 4 computers.
But as you titled your post (Computer Center Load Calcs.) I thought you are looking for a general rule for computer room / server room power allowance.
If that's so, back in late 80's we figured about 25 watts/sq. ft. plus cooling loads, and most recent about 2 years ago we were at 225 watts/sq. ft. plus cooling loads. I hope I got your question right.

 

[A-1Sparky]

Yep, these are all-in-one single computer units for use by individual students. Thanks for the info.