[TowerTalk] Ground rod

[K8RI]

On 7/16/2013 11:45 PM, David Gilbert wrote:
>
> Please explain why.  I understand why the rebar should not penetrate the
> soil/concrete interface, but I don't understand at all why a copper wire
> shouldn't.

It allows moisture to migrate along the wire/concrete interface reducing 
the effectiveness if it doesn't connect to the rebar.  If connected to 
the rebar, moisture will also migrate along it causing corrosion.

I have seen photos on the net of broken concrete , claiming the moisture 
caused steam to form from the strike.  I do not know if that was the 
case or not.  It'll take someone a bit more knowledgeable than me to 
answer that which is a bit controversial.

73

Roger (K8RI)

>
> 73,
> Dave   AB7E
>
>
>
>
> On 7/16/2013 7:53 PM, Jim Lux wrote:
>>
>>
>> What is *really really* important is that NOTHING should penetrate the
>> concrete/soil interface. No rebar sticking out of the side of the
>> concrete below grade. No copper wires sticking out to bond to ground
>> rods. No rods sticking out the bottom of the concrete. Only concrete
>> should be touching soil.
>>
>>
>
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