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Re: Lightning and neutral grounding



Exactly.

Joel B. Black, W4JBB
w4jbb@charter.net


----- Original Message -----
From: "Jon Ogden" <na9d-2@speakeasy.net>
To: "Greg D." <ko6th_greg@hotmail.com>; <amsat-bb@AMSAT.Org>
Sent: Tuesday, March 11, 2003 6:27 AM
Subject: Re: [amsat-bb] Lightning and neutral grounding


> NO! NO! NO!!
>
> Do NOT mess with the NEUTRAL!!!!
>
> You tie your GROUNDS together.  This means you tied your tower, surge, and
> shack grounds to the electrical service ground.
>
> The neutral should ONLY be tied to ground at the service panel which it
> already is.
>
> on 3/11/03 1:17 AM, Greg D. at ko6th_greg@hotmail.com wrote:
>
> > So the question:  I believe everything is done more-or-less
> > correctly, EXCEPT that I need to tie the neutral of the electrical
> > plug in the shack to the same grounded bar that the arrestors are
> > bolted to.  "Neutral" is "white wire" side of the plug.  (The hot
> > side is black, as in charcoal, which is what happens to your
> > finger if you touch it...).
>
> Please don't do this.
>
> > I can't depend on the service entrance
> > ground to be at the same potential as the ham ground during a strike,
> > since they are too far apart.
>
> You are correct here.  That's why you tie all grounds to the service
> entrance ground via a network of ground wires.
>
> > The safety ground (green wire) is
> > left alone.  This means snaking a heavy wire from the lightning
> > arrestor mounting bar, into the wall, and over to the electrical
> > outlet box, and attaching it to the neurtal side of that wall plug.
> > I don't need any other sort of lightning arrestor on the power line,
> > other than a good "surge protector"; our electrical service has an
> > underground feed.
>
> Please again no.  There can be AC voltages present from netural to ground
on
> an AC line.  Neutral is not ground.  Don't run the lightning protection
> ground lines through the house.
>
> If your tower is roof mounted run several, heavy braided ground lines
(good
> surface area) from the tower to the earth.  As an alternate you can use
some
> big, arc welding cable.  Avoid sharp bends and turns.  Each line from the
> roof goes to its own ground rod.  Then connect all ground rods together
> (outside) via #4 copper wire or copper strap.  Additionally, you need
ground
> rods every 16 feet.  All should be interconnected.  Everything gets tied
to
> the electrical service ground.
>
> 73,
>
> Jon
> NA9D
>
> -------------------------------------
> Jon Ogden
> NA9D (ex: KE9NA)
>
> Citizen of the People's Democratic Republik of Illinois
>
> Life Member: ARRL, NRA
> Member:  AMSAT, DXCC
>
> http://www.qsl.net/na9d   <- Updated on 1/22/03!!!
>
> "A life lived in fear is a life half lived."
>
>
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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----
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