[R-390] Grounds

[Cecil Acuff]

That is correct...

Also don't solder your connections and depend on that alone.  The 
instantaneous current flow will melt them loose.  Crimp and solder or use 
Cadweld.

Cecil
----- Original Message ----- 
From: "Glenn Little WB4UIV" <glennmaillist at bellsouth.net>
To: "mikea" <mikea at mikea.ath.cx>; <R-390 at mailman.qth.net>
Sent: Wednesday, July 29, 2009 9:37 PM
Subject: Re: [R-390] Grounds


> Braid is not good for lightning.
> It provides a high impedance to ground for lightning.
> Lightning prefers direct paths without and bends.
> The braid is made of of a number of conductors with many bends.
> This impedes the lightning which is a high frequency event.
> Always use stranded or solid conductors to connect to a ground rod.
> Recommended practice is number 2 minimum outside of the building and
> number 6 minimum within the building.
> Compression fitting are not recommended for outside grounding use.
> Preferred is cad welding.
>
> Braid will provide a reasonable RF or safety ground.
>
> 73
> Glenn
> WB4UIV
>
>
>
> At 01:07 PM 7/29/2009, mikea wrote:
>>On Wed, Jul 29, 2009 at 09:32:50AM -0700, wli wrote:
>> > >As long as we're on the subject of grounding........
>> >
>> > So I am asking, what is the opinion for those of us on the second
>> > story in a wood house with a galvanized metal roof?
>> >
>> > I am thinking that you could use the entire roof as a counterpoise.
>> > Then run a thick braid down to a earthing rod. At the moment, I have a
>> > vertical lashed to the chimney, and a lightning arrestor attached to
>> > my steel roof with a copper braid down to a grounding rod.
>>
>>I'm not in that position at the moment, thank goodness, but I'd think
>>that the more copper straps or braids you could put down to ground rods,
>>the better. All of them loop-and-bend-free, of course, to keep the
>>inductance as low as possible.
>>
>>Do please let us know what your results are, as you continue in this
>>investigation.
>>
>>--
>>Mike Andrews, W5EGO
>>mikea at mikea.ath.cx
>>Tired old sysadmin
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