The conductor running down the inside of the tower
to ground is unnecessary. It carries maybe 10~15%
of the total current.
However, there is higher resistance between
two sections of a crankup which could benefit from
straping the two sectiuons with copper strap. The problem
is then how do you crank the tower down? If you make the
straps long enough to allow crank down, they will flap in the
wind. Making them short jumpers obviates the convenience
of the crankup. I guess you have to decide which situation
is the more tolerable.
73,
Bob AA0CY
----------
From: David Leikis[SMTP:dlleikis@deseretonline.com]
Sent: Sunday, April 11, 1999 9:40 PM
To: towertalk
Subject: [TowerTalk] Lightning protection grounding
Hello,
I have seen many recent postings concerning grounding methods and saw
one that stated to run a ground conductor up the mast to the final
section (and the others as well) to prevent any high resistance points
along the way through the joints.
My question is this: I am erecting a self-supporting crankup and am
concerned about the sliding joints of the installation. It seems as
though these would definitely be high resistance and would need this
more than any other. What is a recommended method from those that may
have done this before? We can have some pretty severe storms here and I
am positive (or negative) that lightning charge dissipation should be
'high' on my list.
Dave KG7EW
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