[TowerTalk] Buried section base...and lightning protection.

[jimlux]

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 at earthlink.net>
> To: <towertalk at 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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>