[TowerTalk] Grounding question

[jimlux]

Jim Miller wrote:
> If grounding should be done in a low impedance fashion why do I always see
> the service entrance ground on homes to be nothing more than a AWG#4 wire
> about 5ft long from the service box to the ground rod embedded in the
> basement slab?
> 
> The cable company ground to the same ground is just a length of bare #12.

Because from an electrical code standpoint, a AWG 4 or 12 *is* low 
impedance.  They're addressing things like power lines falling on your 
external antenna, or shorts to the chassis from internal wiring.

The NEC gives not a whit of concern for RF grounding.


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