On Thu, Mar 6, 2008 at 2:57 PM, Wilt, Charles <WiltC@xxxxxxxxxx> wrote:
If you can swing it, the ideal situation would be to have two UPS powering the computer room. Each
one covering half the circuits; then have any equipment with dual (or more) power supplies plugged
into separate circuits each protected by a different UPS.

I agree. It's what i always recommend and use internally. There is a
very important point in this configuration that i can't stress enough:

If you use this configuration, the load on either UPS in normal
operation MUST always be below 50% (ideally below 40%). If one of the
two UPS fails, the power demanded from the remaining UPS will be
TWICE the normal load.

This is because a system with two powersupplies will use BOTH to
supply power, and will need full power from the remaining one. I've
seen more than one setup that didn't plan for this.

This thread ...


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