[j-nsp] MX960 Power Options

[Colton Conor]

So from what I gather, there are 4 AC power supplies, and each AC power
supply has two plugs. So thats not really going to change, its more what
power to order from the datacenter.

So can I get away with one A side 208V/ 30 AMP circuit and one B side
208V/30AMP circuit?

208V X 30AMP X .80 Max Load = 4,992 watts. That's a lot.

Are you saying I ideally need double this? Why?

On Mon, Jan 25, 2016 at 10:20 PM, Chuck Anderson <cra at wpi.edu> wrote:

> I recommend 4 x 208V.  The MX960 uses "power zones" in a 2+2
> arrangement where half of the chassis is powered by 2 PEMs, and the
> other half of the chassis is powered by the other 2 PEMs.  Make sure
> the 1st PEM for each zone is powered by the A feed, and the 2nd PEM
> for each zone is powered by the B feed.  For dual-input PEMs, you
> should put both inputs of a single PEM on the same branch circuit,
> either A or B.
>
> I would use two PDUs to break out the two 208V/30AMP outlets to
> multiple C19's (plus any C13's you need), and then use C19/C20 cords.
> Each branch circuit PDU will have 4 C19/C20 cords connected (2 PEMs x
> 2 inputs per PEM).  Alternatively you could use L6-20 PDU
> outlets/cords.
>
> On Mon, Jan 25, 2016 at 09:25:02PM -0600, Colton Conor wrote:
> > What are the options for powering a MX960 using AC power? The datacenter
> > provider is offering us power  in the following options:
> >
> > 120V/20AMP A/B Power
> > 120V/30AMP A/B Power
> > 208V/30AMP A/B Power
> >
> > We are leaning towards using a MX960 with 4 AC power supplies and limited
> > cards installed. More than likely we will order the 208V/30AMP A/B Power
> > from the datacenter, but want to know if this will be enough? What does
> > Juniper recommend?
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