[54403] in North American Network Operators' Group
Re: DC power versus AC power
daemon@ATHENA.MIT.EDU (David Diaz)
Sun Dec 29 20:49:27 2002
In-Reply-To: <200212300111.UAA08451@sigma.nrk.com>
Date: Sun, 29 Dec 2002 20:45:48 -0500
To: wb8foz@nrk.com, nanog@merit.edu (nanog list)
From: David Diaz <techlist@smoton.net>
Errors-To: owner-nanog-outgoing@merit.edu
While I would normally think some of this exaggeration. When I was
at Netrail, I did a road trip to upgrade a facility in DC. It's
kinda amazing what passed for colo in those days. The little UPS
actually had a string of Pet boys car batteries. Nathan Estes
dropped a wrench into the battery bay and there was a nice explosion
according to him. The wrench literally vaporized. Now I said that
wasnt possible. He will stick to his story to this day.
The only thing I could figure was that it literally moltified into
super small droplets and just sprayed. Regardless of whether it's
completely accurate, he was out searching for another wrench... it
took a lot of chocolate mile to relax him after that.
At 20:11 -0500 12/29/02, David Lesher wrote:
>Unnamed Administration sources reported that Scott Granados said:
>>
>> 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.
>
>
>Electrocution is but one way to die from too many columbs.
>Internal burning is a big one. Most people die, not from immediate
>cardiac arrest, but rather from kidney/spleen/liver failure as
>they try to remove the cooked you parts from your bloodstream,
>and clog up. (First responder treatment is multiple saline inputs
>to flush you out, and keep flushing you. This via a friend who was
>"lit" and lived.)
>
>The instantaneous short circuit current available from a CO-grade
>battery string is nothing short of frightening. It will easily
>turn a 18" crescent wrench bright orange and start spitting the
>molten metal around within few seconds.
>
>I'm surprised you're still around after a sub battery accident.
>They're a grade up from most CO's in available current, I'd bet.
>
>
>
>
>--
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--
David Diaz
dave@smoton.net [Email]
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