Towertalk
[Top] [All Lists]

## [TowerTalk] Suboptimum grounding/lightning

 To: [TowerTalk] Suboptimum grounding/lightning K7LXC@aol.com (K7LXC@aol.com) Mon, 25 Feb 2002 10:52:20 EST
 ```In a message dated 2/24/02 4:22:30 PM Pacific Standard Time, rfman@nc.rr.com writes: > My shack is constrained to the second floor. This means that my ground will > be long (approximately 15 feet). I CAN'T CHANGE THAT. I can run additional > radials around the shack floor edge and into a walkout area over the garage. > > My service, telco, and cable entrance is on the opposite side of the house > (of course :-). This means that I will have to take some #6 or better (both to > meet code and to do any good) and run it around the house to connect my > shack/antenna ground and the other grounds. What a pain. But I see no alternative. > We are talking about approximately 110 feet. > Well, the purpose of a good Single Point Ground System is to keep the lightning transients OUT of the house so if you do that, what happens IN the house is not as bothersome. You can't obtain a very useful shack ground because of the distance anyway. The inductive resistance (I think that's the proper unit) of a foot of good-sized wire is relatively high so it's not going to encourage any charges to follow it to ground - particularly if it's on the second floor. Bring the cables in where you need them via your SPGS ground bus, have 3 ground rods under the ground bus, and then tie the bus ground into the utility grounds via a big bare, buried solid wire with either exothermic or compression connections and you should be in good shape. The main point is that you want the potential of everything that may be part of the lightning charge to rise and fall at the same rate - that's why you tie it all together. If you've got that and you keep the transients out of the house, then you've won. Cheers, Steve K7LXC Tower Tech ________________________________________________________________________ Where do you get ICE bandpass filters & beverage matching boxes? The same place that pays for the hosting of this list: The eHam Store. Order online at http://store.eham.net. ----------------------------------------------------------------------- ----- FAQ on WWW: http://www.contesting.com/FAQ/towertalk Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com ```
 Current Thread [TowerTalk] Suboptimum grounding/lightning, Todd Nichols [TowerTalk] Suboptimum grounding/lightning, David J. Windisch [TowerTalk] Suboptimum grounding/lightning, Todd Nichols [TowerTalk] Suboptimum grounding/lightning, Red [TowerTalk] Suboptimum grounding/lightning, Todd Nichols [TowerTalk] Suboptimum grounding/lightning, Mark . [TowerTalk] Suboptimum grounding/lightning, Todd Nichols [TowerTalk] Suboptimum grounding/lightning, Chris BONDE [TowerTalk] Suboptimum grounding/lightning, Pete Smith [TowerTalk] Suboptimum grounding/lightning, Todd Nichols [TowerTalk] Suboptimum grounding/lightning, K7LXC@aol.com <= [TowerTalk] Suboptimum grounding/lightning, Todd Nichols