Mailinglist Archive: opensuse (2496 mails)

["Carlos E. R." <robin.listas@xxxxxxxxxxxxxx>]

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On Tuesday, 2008-12-02 at 09:29 +0100, Hans Witvliet wrote:

...  [dc power]

> When ordering servers from HP, you can specify whether you want AC-power
> adapters (110 - 230Vac) or 48Vdc-apapters.
>
> Only catch is that you have to be carefull that in telco-stuff the plus
> is grounded, while other equipment (like RF-transmission) use
> negative-grounding.
>
> Unless you are fond of sparks and welding, you're in for a nasty
> surprice..

   A coworker once fell down from a... what do you call it, a portable
   stairs, when he was connecting power at a exchange, with a screwdriver
   on his hands. This fell across the two naked dc lines... after some
   sparks an entire island resulted without cellular coverage for some
   hours :-}


I wonder, those servers you mention, can be adapted to both type of 
grounding? And how is the price compared to ac power unit, if you 
remember? Not a figure, just curious to know if they are more expensive or 
not.

- -- 
Cheers,
       Carlos E. R.
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