[j-nsp] redundant power AC+DC allowed?

[Richmond, Jeff (ELI)]

I haven't actually tried it, but I know a lab M10 I have doesn't complain that it has 1 AC and 1 DC PS installed. The only error I get is that I don't have power to the DC unit (since its the lab, one AC PS is fine for me). That said though, I personally wouldn't mix the two in a production environment unless you get word from the horse's mouth that it is ok to do so, i.e. supported by JTAC. 

Good luck,
-Jeff

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net]On Behalf Of Vincent J. Bono
Sent: Monday, January 09, 2006 5:48 AM
To: Reino Piip
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] redundant power AC+DC allowed?


Normally you can't do this due to the differing size of grounding wires in 
AC and DC configurtions.  The DC ground cables need to be much larger than 
the AC ones and for a product to be UL listed any connection to ground has 
to be able to carry 100% of the possible fault current at any operating 
voltage.

That does not mean it wont work, just that its not designed to do so and the 
M7 is small enough that it might not be a real issue.  That being I've 
looked and found nothing saying you can't in the docs however nothing says 
you can and I personally would not.




----- Original Message ----- 
From: "Reino Piip" <reino.piip at ericsson.com>
To: <juniper-nsp at puck.nether.net>
Sent: Monday, January 09, 2006 6:23 AM
Subject: [j-nsp] redundant power AC+DC allowed?


> Hi
>
> I didn't find any ok-or-not statements in the technical documentation.
> Has anyone seen an official statement or can otherwise say why or why
> not to use this kind of configuration (1 AC and 1 DC power supply in one
> chassis) for example in M7i?
>
> wbr,
> Reino
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> juniper-nsp mailing list juniper-nsp at puck.nether.net
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