On Mon, 08 Aug 2005 03:09:29 GMT, the renowned Ignoramus9991
wrote:

On Sun, 7 Aug 2005 22:23:12 -0400, Ned Simmons wrote:
In article ghvJe.9796$WQ.8625@trnddc03,
says...



There is a problem with 480 other than electric shock. 480 has the
ability to vaporize metals and spray it around. I have seen the results of
dropping things across 480 and I'm probably overly 'scared of it.


I'd never heard that before, but it explains why a short in
a 480 box tends to blow the cover off, while a 240 "event"
isn't usually nearly as exciting. Personally, I'm
respectful of 120, very cautious around 240, and just plain
skittish around 480. I have one customer that has a bunch
of 550 volt imported from Canada equipment that I did
control retrofits on that makes me feel much as you -
probably more nervous than I should be.

I would not try to run anything 480v. Especially with a kid at home.

i

Industrial fault currents can be a lot higher than what you otherwise
run into. 10kA can do a lot of damage. Even 240V in an industrial
situation can do impressive things if you short it, unlike in a home.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
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