"Rick (W-A-one-R-K-T)" wrote in message
news

OK, per the thread on "Question on grounding rods", I'm supposed to use
8-foot grounding rods rather than twice as many 4-foot rods. I can see
that.

But, we're built on a ledge, one big wide rock that stretches from the
seacoast to the Vermont state line (that's why they call New Hampshire the
"Granite State"). I can get three feet depth at best before running into
solid rock. An electrician friend of mine says I can drive the ground rod
in at a 45-degree angle, but that would still run an 8-foot ground rod to
a depth of more than 5.5 feet below the surface.

Can't be done.

So, what do I do next?

Rick

Check out some new builds in the area and see what earthing arrangements are
being put in there. The new properties will obviously have to conform with
the latest regulations. If the builders have to use a specially long drill
rig, you might be able to bribe them to come and drill you a few new holes.
Failing that, its welding a long tube onto whatever you have that will drill
through granite and then spending a couple of days drilling downwards. Radio
hams are supposed to be renowned for their ingenuity and determination when
faced with tricky situations. Build an echosounder or ground resistivity
meter and scour the plot looking for a crack you can drive rods down
through? The possibilities for experimentation are endless.

Mike G0ULI