[TowerTalk] Grounding of cables to tower?

[Jim Brown]

On 10/18/2017 4:21 PM, Wes Stewart wrote:
> The NEC says of bonding in Article 100: "The permanent joining of 
> metal parts together to form an electrically conductive path that has 
> the capacity to conduct safely any fault current likely to be imposed 
> on it."  By this definition, the coax shield is a bonding conductor.  
> You're making stuff up. 

That's a 60 Hz definition, related to blowing the fuse or breaker. It is 
NOT a suitable definition for lightning nor for EMC, which demands low 
impedance at the frequencies of interest. And the frequency of interest 
for lightning extends well into the MHz range.

73, Jim K9YC