[TowerTalk] Cadweld vs clamps

[David Gilbert]

If you could reliably predict when lightning was near, and if you 
actually disconnected "everything" from whatever it is you had grounded 
when lightning was near, you wouldn't need the ground in the first place.

Regarding the resistance of the earth itself, that's pretty much exactly 
why (at least for relatively short runs) you're supposed to bond all the 
various "ground" points together with some sort of good conductor.  I 
assumed that you were referring to those connections as well when you 
originated this thread, but who can tell any more. You've gone from 
questioning whether cadweld connections were any better or more reliable 
than standard ground clamps to claiming it doesn't matter whether they 
are or not anyway.

Dave  AB7E




On 10/25/2014 4:13 PM, Bill Turner wrote:
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
> On Sat, 25 Oct 2014 13:37:19 -0700, David wrote:
>
>> Lightning may not care about a half ohm resistance, but anything else
>> that might care about the volt drop across a half ohm at currents
>> typical in a lightning discharge sure as hell would.
> REPLY:
>
> Pray tell, what else do you have connected to the hot side of the
> ground rod? When lightning is near I disconnect everything.
>
> And what about the resistance of the earth itself? Even if your ground
> rod connection is perfect, the earth itself has resistance and if you
> are foolish enough to provide a path between your lightning ground rod
> and some other ground, current will flow between them.
>
> 73, Bill W6WRT
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