The recent thread on this issue reminded me of an incident I ran into in our
own home.
Several years ago, I decided to replace the too-small electrical panel in our
home with a 200
amp capable panel.
Before we bought this home, it had been "modified and upgraded" by two
ex-students of the
professor who owned our home before we bought it.
After installing the new panel (I am a qualified electrician),in the concrete
basement I
investigated the "ground" system the previous pair had installed.
I had been having considerable trouble from RFI to our household applicances,
most often
when I was operating on 40 meters.
When I investigated the "ground" system, I discovered a piece of #8 solid
copper wire,
leading from the buss bar of the old panel, exacly 33 feet long, terminating at
a very carefully
installed clamp to the cold-water feed from the city system....which was
plastic pipe.
I replaced that with a much shorter bit of #8 solid copper wire, terminating at
two 8' long
copper-plated steel ground rods about 5 feet from the new panel. I would love
to have been
able to install those ground-rods closer to the panel, but was unable to do so
due to the
surrounding concrete. I DID make it as short as I could.
RFI disappeared.
Ken W7EKB
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