[Elecraft] A dumb question about lightning

[Jim Brown]

On 7/31/2023 2:14 PM, jerry wrote:
> Interesting.  Suppose the service entrance is at one end of the house,
> and the ham shack at the other end?  I don't think it's physically
> possible to provide a low inductance path that's 60 feet long, is it?

I've posted a link to my tutorial, which covers this, but which folks 
who need to know what's in it haven't bothered to read. Fred is 
absolutely correct, BY LAW, all grounds in a premises MUST be bonded 
together. In his ARRL book on the topic, to which I contributed, Ward 
Silver, N0AX, recommends a perimeter ground ring, connecting multiple 
driven rods. A full perimeter ring wasn't practical for the building 
that houses my shack, so I did a half perimeter ring from the sub-panel 
for the building to the shack on the other side of the building.

Jerry is entirely correct -- indeed, the rule of thumb for bonding 
between a tower and the building(s) where there's no mains power at the 
tower is to NOT bond if the tower is more than 100 ft from grounds for 
the building (and some references suggest 60 ft).

The whole point of bonding all the grounds is so that in the event of a 
strike, the entire premises rises as closely as practical to the same 
potential, minimizing the potential difference between grounded 
equipment and surfaces.

Re-posting the link. http://k9yc.com/GroundingAndAudio.pdf  And it's NOT 
mainly about audio.

73, Jim K9YC