[j-nsp] MX960 Power Options

[Colton Conor]

Do most data center providers offer this 400V? The next step up from the
208V/30AMP A/B side was a 208V/30A/3-Phase Power A/B side. I have never
dealt with 3 phase before does the MX960 support 3 phase? Not sure if this
matters, but the 208V/30A/3-Phase Power is double the cost
of 208V/30A/Single Phase Power.

On Tue, Jan 26, 2016 at 9:57 AM, Youssef Bengelloun-Zahr <youssef at 720.fr>
wrote:

> Hello Colton,
>
> For that kind of devices using lots of C19 plugs and high wattage PSU
> (>2kW), you can also go with 400V/30AMP power feeds.
>
> We find that solution more efficient for that particular case, for example
> when use power 4 blade chassis in a rack (two chassis per pair of plugsets).
>
> Best regards.
>
>
>
> 2016-01-26 16:50 GMT+01:00 Colton Conor <colton.conor at gmail.com>:
>
>> 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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>> >
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>
>
>
> --
> Youssef BENGELLOUN-ZAHR
>