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Re: [TowerTalk] Ground wire

To: "Jim Lux" <>
Subject: Re: [TowerTalk] Ground wire
From: "Jim Miller" <JimMiller@STL-OnLine.Net>
Date: Mon, 17 Sep 2007 13:46:39 -0500
List-post: <>
I usually do this, not asking it clearly.  It makes perfect sense to me but
I know what I am trying to find out.

I can run enough of the 3 wire #8 cords to be as large or larger than
whatever is recommended.  What I should have specified is that the wires are
insulated (romax style) and then the separate runs of course are insulated
from each other and then bundled and ALL the wires at each end tied together
as if they were ONE conductor.

Now the question.  I was wondering if the wires being insulated individually
will cause some adverse effect (being caused by their capacitance or
inductance to each other) on their capability to properly handle a
("normal") lightning strike verses using a single conductor of similar size.

Thanks guys,
73, de Jim KG0KP

----- Original Message ----- 
From: "Jim Lux" <>
To: "Jim Miller" <JimMiller@STL-OnLine.Net>
Cc: "TOWERTALK Reflector" <>
Sent: Monday, September 17, 2007 1:11 PM
Subject: Re: [TowerTalk] Ground wire

> Jim Miller wrote:
> > I need to run ground from my antenna entrance panel to the house
> > ground location.  Will I get in trouble using two or three runs of
> > left over three wire #8 cord instead of going out and buying some
> > single wire #4 or whatever?  I know, it should be at the same
> > location, but it isn't .
> "in trouble" has lots of meanings.
> First, 3 strands of #8 isn't the same cross sectional area as a #4  (the
>   3 #8s are slightly larger in cross section, total, than the #4), so
> that should be ok.
> Assuming you've bonded all the conductors together, so it "looks" like a
> single conductor, philosophically that works.
> "the code" requires a variety of sizes, depending on what it's hooked to.
> For antennas and masts, the bonding is not smaller than: #10 copper, #8
> Aluminum, or #17 copper clad steel or bronze  (810-15, 810-21)
> For CATV, same as antennas/masts
> for telephone, AWG14 or larger copper
> for ground rods or other separate grounding systems, AWG6 or larger used
> to bond the two grounding systems together.


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