[c-nsp] Multiple power supply failures. Advise needed

[Michael Ulitskiy]

On Tuesday 01 September 2009 07:26:27 pm you wrote:
 
> Something really odd/fishy is going on at the facility in question.
> Either they have a problem and won't admit it, or they're just as
> baffled as you are. But there is obviously *something* very bad going on
> to fry power supplies like that.
> 
> Which leads me to a question; has any of the stuff you've replaced
> become part of the fried PSU problem, or just originally installed
> supplies? One tells me they're lying and the power is even worse than a
> raw utility feed, the other says maybe you have metal particles (or
> something) building up from under the raised floor over time.

Out of the 7 failed PSUs 6 was original equipment. One cisco gear (AS5400) has power supply failed twice.
The 2nd failed power supply had been in service like 24-48 hours only before the failure, so may be it was just bad
power supply. I'm leaning toward metal particles build up as a most plausible theory at the point. 
I just don't know how to deal with the problem...

Michael