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Re: [TowerTalk] Antenna/Tower Grounding (Lightning Protection)

To:, <>
Subject: Re: [TowerTalk] Antenna/Tower Grounding (Lightning Protection)
From: Jim Lux <>
Date: Thu, 04 Jan 2007 15:52:10 -0800
List-post: <>
At 09:56 AM 1/4/2007, Scott Honaker wrote:
>The current (some say "dumbed down") Technician class question pool has a
>question on tower grounding.  There's no reference given (I would like to
>find it).
>T0B11 (C) What is considered to be an adequate ground for a tower?
>C. Separate 8 foot long ground rods for each tower leg, bonded to
>    the tower and each other

I would assume you could contact the VEC folks building the question pools.

And, of course, my original comment was that the 2005 NEC (the 
latest.. it comes out every 3 years) doesn't say anything (at least 
in the obvious places) about methods for grounding towers.

Maybe it's in some other recommendation, or in a proposed revision 
for the 08 code?

 >2.    Your tower ought to have at least one ground wire, minimum of
> >#8 gauge wire, to one ground rod within two feet of each tower
> >leg.  The latest version of the National Electrical Code mandates
> >two ground rods and two wires at each leg.
>Really?  Which code? The 2005 NEC is silent on towers, per se.  Art
>810.15 says masts and metal structures shall be grounded in
>accordance with 810.21.  810.21 just has the stuff about the size of
>the wire, straight line runs, protection of the connections, and what
>can serve as a grounding electrode.


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