Re: rack power 7+ how to tell if 3-phase power

what you all are saying, is that it's up to how wired in receptacle box?
i see rack has two Liebert MPH PDU's, one for each power supply , with
further reading it appears the pdu will handle either single or 3 phase.
But new data center is going to have to match receptacle plug type.


On Thu, Apr 21, 2022 at 1:53 PM James H. H. Lampert via MIDRANGE-L <
midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

On 4/21/22 10:44 AM, Krill, Coy via MIDRANGE-L wrote:

Pull the plug out. 3phase will have 5 pins and single phase will have 3.

Actually, it may only have 4 pins (as does single-phase 240VAC with a
neutral).

At the Printing Museum (https://www.printmuseum.org), we've standardized
on a specific size and configuration of 4-pin twist-lock 3-phase plugs
for our 240V plugs and sockets, even if we're plugging in single-phase
equipment.

(I spend my Saturdays docenting there; it was because I'm a programmer
by trade that I was the first one there to realize that the notches at
the top of a Linotype matrix form a binary code.)
--
JHHL
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