Hi. What's the typical way to connect two ground rods to a meter
panel ? I borrowed a commercial ground meter, and measured 50 ohms at
my meter panel. If the resistance measures above 25 ohms, the NEC
recommends driving a second ground rod, at least six feet from the
first one. When connecting the ground rods to meter panel, is it
better to connect them in series, or run a wire from the meter panel
to each rod ?
I don't think it makes any difference.
I'd probably clamp another #6 wire onto the grounding electrode
conductor with a big ol' copper split bolt wherever it was convenient
and not subject to having people mess with it (like maybe underground,
right next to the 1st electrode.) If for some reason I wanted to make
the tap irreversible, I would silver-solder the threads and the bottom
side of the nut on that split-bolt after it was good and tight.
Whatever you do, don't cut the first grounding electrode conductor.
The wire has to be unbroken to the *first* electrode:
The grounding electrode conductor between the service equipment and
any convenient part of the grounding electrode system (to the first
electrode) must be installed in one continuous length without a
splice unless spliced by means of listed irreversible compression
connectors or exothermic welding, 250-64 (c).
It must always be suitably protected against corrosion, 250-62.
Unbroken to both electrodes is a good idea, but the NEC doesn't require
it. (I believe some localities might, however.)
I was just relating as to how I always done it on new services.....
If I am gonna mess around updating old ground wires, rods, etc., generally
I will replace them all--conductors, clamps, the whole nine yards....but to
each his own I spose, so long as the connections are all sound.
If the old ground rod is not doing the job, disconect it! Remove it if you
want, but don't use it.
Put in a new ground rod 2 or 3 feet away. Most codes will not allow more
than one ground rod - and for good reason.
You asked if you connected the new ground rod in series or parallel. Pray
tell, how would you connect them in series? Think about it.
Why the enlisted ones?? Is it because the brasses' stuff don't stink??
I've also read that rock salt buried around the rod will help with getting a
You might want to contact the ARRL (American Radio Relay League) at
www.arrl.org. They might have some good information.
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