In article ,
Jon Elson wrote:

The residential transformers are tested, I believe, to limit current to
below
10,000 A. If they didn't, you couldn't use 10 KA max interrupting capacity
breakers in your home panel. If 1000 A doesn't scare you, 10,000 really
ought to! I have seen a 3-phase 400 A 240 V service at a motel short out
during a building fire. It was like a ground display at the 4th of July!
The fire department was working on the fire up to that point, but when
white hot aluminum started cascading all over them, they ran for their
lives!

jon

Of interest:
http://www.maintenance-news.com/cgi-...d.cgi?database
=vibetalk.db&command=viewupload&id=29

--
B.B. --I am not a goat! thegoat4 at airmail dot net