RE: DATACENTER: Datacenter HVAC requirements

[Nathan Stratton <nathan@robotics.net>]

On Mon, 14 Jun 1999, Gregory Trubetskoy wrote:

> I would not recommend relying on rules of thumb such as 20A per rack. The
> equipment out there is getting denser and denser, and with those 2U server
> chassis that everyone makes these days, I can see a rack drawing over 30A.
> Don't underestimate a loaded cisco 7505, they too can draw a lot of power
> when loaded.

Very true, back when I ran a few datacenters we had people pulling over 60
amps in a rack.
 
> A more accurate estimate can be made by actually looking at what equipment
> you'll be placing there. If you underestimate, upgrading later on is not
> always an option and will certainly cost more than doing it right from the
> start. 

Yep, 480 V 1000 amp 3 phase switch gear is a pain to swap out, been there
done that.

> Grisha

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Nathan Stratton				Telecom & ISP Consulting
http://www.robotics.net	 		nathan@robotics.net