[TowerTalk] Grounding

[Keith Dutson]

You definitely want to make a connection between the tower and SPG. So that
the two points are near the same potential during a strike.  The goal is to
reduce current flowing between the two points, so the path needs to be low
resistance and impedance (for the RF component of lightning).  Any conductor
exhibits inductance as current flows through.  A wire or strap buried in the
ground exhibits much less inductance, so avoid running it through conduit.

Keith NM5G 

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of C. Dwight Baker
Sent: Wednesday, January 19, 2005 7:47 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Grounding

TT:

Here's the situation.  I have a tower that is 130 feet from entrance to my
shack and it is connected with a 3 inch plastic pipe. I am running 2 LMR-600
coax, rotor control, and 2 antenna switches on the tower.  Should I run a #4
bare copper ground wire inside the pipe from the tower to the SPG at the
entrance to the shack; run the copper wire along side of the pipe or just
ignore the #4 connecting the two together?  

 

Further, the tower legs are grounded with 3 inch copper strap at about 25-30
degree angle from the tower to 8 feet copper ground rods about 8 inches
below grade and the rods are connected with 3 inch copper strap.

 

Lightning is my main concern.  Advice from all you wise sages please.

 

Dwight

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