nanog mailing list archives

Re: DC power versus AC power


From: "Scott Granados" <scott () wworks net>
Date: Sun, 29 Dec 2002 18:26:43 -0800


Yes it will the wrench will become litterally liquid and spray.  So no it
doesn't explode in the litteral sense but it appears to and also sounds like
it:).  A safe experiment to do which many people probably did as Kids is to
take a piece of tin foil and place it across the terminals of say a trainset
transformer or perhaps  a 6 V drycell battery that you set up with a proper
switch so you can switch on the flow when you are standing back.  The foil
will sizzle and pop used to be the way you could demonstrate how fuses
worked.  Imagine that but this time the wrench handle goes pop.

----- Original Message -----
From: "David Diaz" <techlist () smoton net>
To: <wb8foz () nrk com>; "nanog list" <nanog () merit edu>
Sent: Sunday, December 29, 2002 5:45 PM
Subject: Re: DC power versus AC power



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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