On 1/4/16 12:15 PM, Douglas Ruz (CO8DM) wrote:
Jim,
Thanks for the idea...Are those extra 22 or 23 ft of AWG 4 bare copper
connected in some place of the buried section ???..
Just run it generally around the buried section. Concrete is fairly
conductive, and you've got a lot of surface area.
73....Douglas, CO8DM
"No creo que haya alguna emoción más intensa para un inventor que ver
alguna de sus creaciones funcionando. Esa emoción hace que uno se
olvide de comer, de dormir, de todo." - Nikola Tesla
----- Original Message ----- From: "jimlux" <jimlux@earthlink.net>
To: <towertalk@contesting.com>
Sent: Monday, January 04, 2016 1:12 PM
Subject: Re: [TowerTalk] Buried section base...and lightning protection.
On 1/4/16 8:58 AM, Douglas Ruz (CO8DM) wrote:
Hi,
I am almost ready to build a Buried section base for a 25G tower.
The hole is 2 x 2 ft and almost 3 ft deep...is it ok for a guyed
tower?...it is almost half cubic yard...and about 2000 pounds of
concrete...no steel bars inside.
Any tips are welcome.
I need some ideas about the lightning protection...How can i do a
good connection to the tower legs to the ground rod ?...
You're burying 3 feet of section in the concrete. That makes a
fairly good connection. A typical Ufer ground has 20 feet of
conductor (which doesn't even have to be continuous). You've got 9
feet with just the vertical part of the legs, and probably another 10
feet with the cross braces.
While you're at it, though, I'd get 22-23 feet of AWG 4 bare copper
and put that into the concrete (leaving a couple feet sticking up in
the air) with the base. It's a lot easier to connect to a piece of
copper wire than trying to clamp onto the tower leg, and sooner or
later, you're going to want to hook something up to "ground".
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