First off, I am not speaking for Motorola, nor do I advocate or advise the
use of this or other Motorola methods or standards.
Motorola's latest R56, Standards and Guidelines for Communications Sites,
makes mention of a grounding plate option. This plate would expose not
less than 2 sq feet of soil to the grounding plate -- and be placed no less
than 2.5 feet deep. They mention that if you cannot bury the plate that
deep, reference NFPA 780, section 3-13.1.5 for more info. Also, several
plates can be bonded together, say around a bldg at the corners and middle
sides, to form a buried ground ring, acting as a ground system.
Personally, plate coupling with something like copper or aluminum plate
plate stock sounds fine to me. I hope this helps!
After being spoiled by Florida's sugar sand in which you could dig a hole
for a base for holes and anchors by hand and drive a ground rod down by
"jetting" it, I now live on one of the biggest rock piles in the world.
Most of the Big Island of Hawaii has solid lava rock. Fortunately, my
is a little bit better...a mix of clay, small rocks and rocks up to a foot
across, certainly not the kind of stuff easy to get into. Sometimes the
of pure clay is just a few inches thick, in other places it can be ten
deep. Ground rods and copper are pretty expensive out here and I don't
to experiment losing rods just a couple of feet into the ground and
stuck at that depth.
I know I can use a backhoe to dig the holes and will have one on the
property to dig the cesspool, but what is the best way to go getting ground
I asked the locals at one of the radio club meetings and they weren't
help. Responses were.....most guys just drive it in a foot or so and use
radials. Since the station will sit on a hill, I really don't feel too
putting the rod in only a foot, however I do plan on running the radials,
since I know it will help.
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