[TowerTalk] dissimilar metal in ground

[Randy]

Hans:
I am not conversant in the requirements of the NEC or any other 
electrical codes, but, be
advised that in many/most/all installations, the copper (or galvanized) 
plumbing pipe of the
home may well also be used as a "ground". Sometimes just the cold line, 
but I've often seen
the hot and cold lines electrically bonded together on the lines above 
the water heater here
in Florida.

I also admit ignorance as to when it was, or if it might still be 
permissible, but I've seen plenty
of homes with a piece of plain steel rebar as the electrical "ground" rod.

73
Randy
KZ4RV

On 12/16/2011 12:33 AM, HansLG at aol.com wrote:
> Gentlemen,
>
> I have a tower with a galvanized base dug down in the ground. My house is
> equipped with a number of copper-clad grounding rods. The tower is connected
>   (via my shack) to the grounding rods.
>
> What should I do to avoid the galvanization to be eaten away due to current
>   caused by the dissimilar metals. As far as I understand zinc and copper
> will  make a battery cell due to the humidity in the ground.
>
> Hans - N2JFS
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