[TowerTalk] Lightning ground for tower with ufer ground

[Beat Meier]

Wauw

Thanks a lot for the asnwers ;-)

Comeon nobody has any information to help me?
I realy want to put the grounding system in and erect my tower :-(

Please anyone

Thanks Beat

Beat Meier wrote:

>Hello
>
>After several posts and reading a lot of the forum about tower grounding 
>the opinions seems to differ a lot.
>I'm now almost ready to install my grounding system but I'm in doubt.
>First of all I will have a lot of electronic at the tower (embedded 
>system,wifi stuff at 2.4GHz and 5.8GHz).
>And where I live horizontal grounding is much more better than vertical 
>grounding...
>Analyzing the earth has given me that the best value is in 1m deep
>What I have:
>
>0. Tower triangle 30cmx30cmx30cm (tower height 66m) and 6 concrete bases 
>every 1m³ of concrete with rebar cage
>3x in a distance of 20m of the base (G1.1, G1.2, G1.3)
>3x in a distance of 35m of the base (G2.1, G2.2, G2.3
>Something like this
>
>
>          G2.1                                G2.2
>
>
>                   G1.1         G1.2
>
>
>                              B
>
>
>                            G1.3
>
>
>                            G2.3
>
>
>
>                              Garage (20m from base)
>
>                                                           House (55m 
>from base)
>
>
>The only connection are the power lines from the garage to the base no 
>other connection.
>I will connect the base with the garage with a wire and and a lightning 
>protector but this is an other "article" ...
>
>1. The tower base has too a 1m³ concrete with 4 connections of stainless 
>soldered to the rebar cage below earth.
>    the tower base of steel has 3 connections of stainless soldered 
>above earth.
>
>2. I have now opened from Base (B) to G1.1 and from Base to G1.2 a 
>trench of 80cm deep.
>The idea is to connect a copper wire from Base to G1.1 and from Bae to 
>G1.2 to use so 3m³ concrete ...
>
>Now my questions.
>
>What should this wire be? Most articles here in the list says you should 
>use a #4 (which is AWG4 I guess).
>What I've read in several books is you must use #0 to put in earth.
>My problem is now ok the greather the better but #0 is very very 
>expensive here.
>Now the question is: Can I use AWG2, AWG3 or even AWG4? I cannot buy 
>solid wires only stranded (7x3mm for example for AWG0)
>I think the usage of AWG0 is because it should alive very long in earth 
>(apart that is disapates better the current)
>
>So in the fact that I have 2x20m horizontal wires what should I use?
>Do I have to put ground roads between B and G.1.1 and B and G1.2 for 
>lightning protection grounding system?
>What is better:
>   2 radials more at the base
>or
>  use the other 2m³ concrete and go from G1.1 to G2.1 and from G1.2 to G2.2
>and if it's better to go from G1.1 to G2.1 can I use a wire which is 
>smaller than that comes from the base?
>What do you think? What is better for a lightning protection of the 
>equipment?
>
>It would be nice to here much answers. I'm since a lot of time 
>investigation and time goes on and my tower is still
>not elected :-(
>Now I really want to go on but I don't want to burn my equipments ...
>
>Thanks a lot for your time and ideas!
>
>Beat
>
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