At 10:29 2003-06-02, Steve Dove wrote.....
Typically wells make for less impressive grounds than one might initially
think. Firstly, the
metal casing doesn't go all the way down, usually only as far as it takes
to hit reasonably
solid rock that will hold a bore; even then perhaps only the top length
(20 feet) will be
metal, the rest plastic. The metal is usually untreated steel, which
protects itself with a
layer of rust; makes for a lousy electrical dirt/pipe interface.
and in Canada most provincial electrical codes REQUIRE the well casing be
bonded to the common electrical ground as there can occasionally be a
rather large electrical charge built up on the often well insulated from
ground steel well pipe casing.
Larry
VA3LK
|
