A good question, Jim... I suppose the though is that the stainless
steel through bolts that bolts the powdercoated steal clevis to the
foundation rod and the aluminum tower legs, are a) not copper/aluminum
and b) may not have the best of electrical interfaces with the tower
leg. But since you mention it, I will consider doing some testing to
see what the actual measurements are... Not sure I want any arcing
between the bolts and aluminum through holes in my base section
though... I'd prefer no arcing at all if possible. But I get your
point. Those bolts are very attractive... and the steel threaded rods
protruding 6 foot into the concrete foundation also look mighty
attractive for additional bonding points assuming they were properly
bonded to the rebar cage and the rebar cage were properly welded
together... Things to think about. Would be much easier to construct a
brazed lug end from the strap end than to make it conform to a round
tower leg, etc...
Feedline grounding to the tower is a whole 'nuther animal... I won't
pollute this thread by drifting to that. <grin>
73,
______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 10/17/2017 9:31 AM, jimlux wrote:
Why not just a lug on one of the bolts? Good clamping force, good
electrical connection, etc. If you've already bolted the base to the
rods, is there enough to put a lug and a second nut on top?
This brings up an interesting point, why is everybody talking about
making "clamps" of some sort to clamp onto a structure which has
bolted joints? I can see needing a clamp when you're grounding a long
length of hardline that you don't want to break for a connector. And
I've seen clamps on things like chain link fence posts (typically so
that the gate is bonded to the rest of the fence - the fence posts are
set in concrete in the soil, so they *are* a grounding electrode)
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