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[Towertalk] Ground wire impedance

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Subject: [Towertalk] Ground wire impedance
From: (Martin Ewing)
Date: Fri, 02 Aug 2002 11:49:48 -0400
My house has stranded lightning cables from the previous owner (run parallel to 
CATV wiring - but that's another story).

I reckon that keeping your house from burning down does not require as good a 
grounding as keeping your MOSFETs running.   Installing stranded cable must be 
lot easier than solid, but maybe there's more to it.

I found some Canadian govt spec that says that stranded cabling is REQUIRED. 
See There seem to be a 
lot of prescriptions in this business, but not much analytical or experimental 


W1UK wrote:
> Steve,
> I am curious as to why all the building lightning rod systems I have seen on
> barns and homes use stranded wire in a rope lay,  from the rod to the ground
> field?
> Harger Lightning Protection sells many sizes of multi strand bonding
> conductors.  They identify them with their cross-sectional area measured in
> cm.  I also have a few Andrews hardline grounding kits that use stranded
> wire.
> Perhaps manufacturers sacrifice some performance for flexibility?

Martin Ewing AA6E
Branford, Connecticut

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