21 Jun
2005
21 Jun
'05
11:22 a.m.
On Tuesday 21 June 2005 11:37, Kevin Handy wrote:
If you have a cable between the two buildings, you
can get a voltage difference between the two grounds.
Especially if you have a lightning strike in the area.
This is why Purdue has a nice and heafty copper bar (1-2 sq-in
cross-section) running through its steam tunnels which is what all of
the buildings' grounds are connected to.
Pat
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