[j-nsp] M160 Power Requirements

[variable at ednet.co.uk]

On Mon, 10 Nov 2003, Scotty wrote:

> What sort of power do I need to handle a dual-ps M160.  If I read the manual
> right it says 65Amp -48V to -60V DC power.  Do i really need 65 amps?  will
> a pair of 20amp circuits be enough if it is the only thing connected.

Unlikely that you will need the full rated current, but you'd best be 
checking it with the JTAC.  IIRC, it has to do with how many FPC and PIC's 
you have installed.  Interestingly enough, the juniper site doesn't list 
max current on the M-160:

http://www.juniper.net/products/ip_infrastructure/m_series/100042.html#04

For our M-40's it lists 13A at 240VAC as the maximum it will draw.  In our
test lab we actually measured it at 1.6A (at startup, running current was
more like 1.1A) distributed between the PSUs, but that's with only a
handful of PICs plus a routing engine.

IIRC, the JTAC has info on current pull for the individual components so
you can total it up.

HTH,

Rich