RE: UPS Position In Rack / Cabinet

["Paul Gordon" <paul@xxxxxxxxxxxxxxxxxxxxx>]

I concur - UPS's at the bottom because of the weight. I've worked in
*many* datacentres and I've only ever seen UPS's at the bottom for this
reason.

I'd be rather uncomfortable putting big UPS's anywhere other than the
bottom, - although if they're little 1U ones, then I guess it wouldn't
matter..

It does depend to some degree what else is in the rack, - as a general
principle you want to avoid it being top-heavy to reduce the risk of it
toppling.

Paul G.

-----Original Message-----
From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
Of Tim Hawes
Sent: 08 May 2006 20:10
To: UKHA_D Group
Subject: Re: [ukha_d] UPS Position In Rack / Cabinet

I'd say put it/them at the bottom because of the weight. However in
other cabinets I have seen active equipment put at the top, because of
the heat issue. Since you're actively ventilating your cabinet I
wouldn't be too worried - stick a couple of Dallas 1-wire temp sensors
in there if you are concerned but I'd have thought you'd be ok.

What VA rating UPS are you using?

Tim.

On 5/8/06, Martyn Wendon <martynwendon@xxxxxxx> wrote:
> What's the best position for UPSs in a cabinet?
>
> I'm getting conflicting opinions. Some say that putting UPSs at the
bottom
> is best as it's generally the coolest place in an enclosure.  Others
say
> that putting them at the top is best as they are generally the hottest
> pieces of equipment so why let all the heat they produce rise up
through
> other equipment making that hotter?
>
> My cabinet is in the garage and made of wood approximately 2000mm *
900mm *
> 800mm internal dimensions.  It's got a 6" extractor fan pulling
air in
at
> the bottom and a 6" extractor fan sucking air out at the top
which is
then
> ducted outside the garage.
>
> The cab


inet will eventually contain 2 UPSs, 3 server PCs, sky box, ntl cable
> box, cctv dvr, cctv web server and various other bits and bobs
(switches,
> routers, etc).
>
> Shelving will be 18mm mdf with holes drilled to promote airflow from
bottom
> to top.
>
>
> Any thoughts?
>
>
> Martyn



=20