It seems to me a valid question to ask on this thread: Do you gain anything
by, for example, drilling a hole to get a ground rod deeper?
If you think about it, the answer might not be so simple.
The point of a ground rod is to maximize electrical contact with the ground.
If you have to drill 48 inches of an eight-foot rod and don't employ some
kind of conductive filler (concrete, bentonite, etc.) to bond the rod to the
rock, how much better off are you than just putting in a 48-inch rod? Even
if you do use bentonite, is rock a good connection?
If that's the case, what would be wrong with cutting the eight-foot rod into
two 48-inch rods and driving them 96 inches apart?
The point of eight- or ten-foot ground rods is to get eight or ten feet of
contact area, not necessarily to get eight or ten feet deep, yes?
Just curious on all this.
73, kelly
ve4xt
On 1/18/15 10:04 PM, "Bill Aycock" <billaycock@mediacombb.net> wrote:
>
-----Original Message-----
From: Bill Aycock
Sent: Sunday, January 18, 2015
> 7:23 PM
To: Ken
Subject: Re: [TowerTalk] w7ekb & ground rods
Ken--
I was once
> told (Unofficially) by a power line guy that the length was more
important
> than depth, and a rod driven at an angle was often the only option
when rock
> was a problem.
However, Mr. Murphy ruled against me and I only knew I had a
> rock problem
when I had only about 8" left to go.
Bill--W4BSG
-----Original
> Message-----
From: Ken
Sent: Sunday, January 18, 2015 7:00 PM
To:
> maflynn@theflynn.org
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk]
> w7ekb & ground rods
If I may ask, what¹s the ³appropriate tool² when you have
> a rock layer 40²
down? i tried a hammer drill, waste of time. I rented an
> SDS-MAX hammer
and I got one in all the way, four others only made it most of
> the way. So
what is the recommendation?
Ken WA8JXM
> On Jan 18, 2015, at
> 7:46 PM, Martin A Flynn <maflynn@theflynn.org> wrote:
>
> Ran this past one of
> the code enforcement guys in the county. Surprising
> response:
>
> "We make
> you buy a UL listed panel board and breakers - what makes you
> think you
> can build a grounding system that is equal to UL *and* be able
> to prove it
> in court if there is a problem? Buy the listed rod(s) and
> drive them with
> the appropriate
> tool"
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