[c-nsp] Cat 6509 Power supplies

Lamar Owen lowen at pari.edu
Tue May 26 15:01:35 EDT 2009

On Tuesday 26 May 2009 01:51:37 pm Bill Blackford wrote:
> I may need to use 110V NEMA 5-20
> plugs.

> Can the 3000W power supply (in redundant mode) support a fully populated
> 6509 chassis (no POE) when using 110VAC?

A NEMA 5-20 plug can only support a max normal load of 80% of 2400W 
(20A at 120V), which is 1920W.

Even a 30A 120V circuit is only good for 2.8KW continuous.   A 20A 240V 
circuit will do 3.84KW max continuous, though.  You might get away with 6-20 
plugs, or L6-20, for the 3KW supplies.

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