[54395] in North American Network Operators' Group
Re: DC power versus AC power
daemon@ATHENA.MIT.EDU (Scott Granados)
Sun Dec 29 20:09:36 2002
From: "Scott Granados" <scott@wworks.net>
To: <wb8foz@nrk.com>, "nanog list" <nanog@merit.edu>
Date: Sun, 29 Dec 2002 17:40:02 -0800
Errors-To: owner-nanog-outgoing@merit.edu
Is 48V DC at the amps present normallyin switch rooms etc enough to cause
electricucian? I have seen bad things with wrenches dropped across
batteries even 12 volt car batteries although in this case it was a large
battery bank in a submarine but I was curious about the 48V sources in
switch rooms.
----- Original Message -----
From: "David Lesher" <wb8foz@nrk.com>
To: "nanog list" <nanog@merit.edu>
Sent: Sunday, December 29, 2002 4:43 PM
Subject: Re: DC power versus AC power
>
> Unnamed Administration sources reported that Michael Painter said:
> >
> >
> >
> > > >But, as Stephen already eluded to... Compared with an AC plant
design, to
> > me, one of the biggest drawbacks of a DC plant is safety (I have had to
> > kick a fellow worker away from the rack before). <<
> >
> > What was the worker doing? Is this 48 VDC?
>
> Bet so.
>
> And note, it's not just ISP's, of course. I heard that Sprint
> PCS ha[s,d] a Dallas tech in critical condition and a dead switch
> after a dropped wrench & resulting fire.
>
> In the words of Phil Esterhaus:
>
> Let's be careful out there....
>
>
>
>
>
> --
> A host is a host from coast to coast.................wb8foz@nrk.com
> & no one will talk to a host that's close........[v].(301) 56-LINUX
> Unless the host (that isn't close).........................pob 1433
> is busy, hung or dead....................................20915-1433
>
