Dave:

An exposed copper to galvanized steel connection will quickly lose the zinc,
and the steel will rust profusely. So, whatever approach you use, put lots
of weatherproofing over the joint. Personally, I use thin stainless steel
between the two dissimilar metals along with Penetrox and then weatherproof
with roofing tar. The professionals use a special crimp connector or a
purpose designed CadWeld connection.

--
Crazy George
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"Dave" wrote in message
m...
The answer must be here but after some searching I can't find it.
There is all sorts of conversation about ground rods and dissimilar
metals but I can't find the basic answer I need -- How do you make the
steel to copper connection? Do you simply clamp galvanized steel to
copper? Thanks.