Folks - thanks for the input! Jim - Not sure what version I’ve got - it doesn’t say, so perhaps it is first edition of the book. However it does have a few paragraphs on perimeter grounding, on pages 4.22 - 4.24. And yes, I had planned on a series of ground rods driven in and connected to the #4 wire along its path to the Ufer connection point.
You mentioned “at least 1.5 - 2x their length" of the ground rod spacing. What would be the minimum spacing between rods? They are, after all, not the easiest things to “push” into the ground. Luckily we’ve got no Telco line coming into the house, nor CATV - it is all fiber here. Jim / K7TXA > On Aug 23, 2021, at 9:27 PM, Jim Brown <[email protected]> wrote: > > On 8/23/2021 6:42 PM, James Bennett via Elecraft wrote: >> Per N.E.C. specs, I need to tie the ground system at the shack entrance to >> the house utility ground - probably 150’ or so from the coax entrance panel >> to that Ufer spot. > > There's a bit more to it than that. In essence, more grounds are better and > you can have as many as you want, but they must ALL be bonded together. That > includes power, telco, CATV, shack, etc. > > My electrician said that a #4 solid copper wire running from the coax > entrance panel to the Ufer point would suffice for keeping the grounds > together. Looking at the ARRL book on grounding and bonding, it appears that > what I’m going to do is to install a “perimeter ground.” > > Not quite -- it would be a perimeter ground if that #4 (yes, big enough) were > connecting driven rods spaced at least 1.5 - 2x their length around the > perimeter. > > Do you have the first or second edition of the book? Ward and I worked > through some of the issues involved with situations like yours for the second > edition. > > 73, Jim K9YC > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
