[AT] grounds

[Gene Waugh Elgin, Illinois USA]

I cannot speak for the National Electric Code, but here in Elgin, which 
has pretty tough local requirements (EVERYTHING in at least EMT, no PVC 
underground, etc., only requires one (residential, anyway) dedicated 
ground rod.

/Gene
Gene Waugh
Elgin, Illinois USA/

CEE VILL wrote:
>
>
> ________________________________
> From: cvee60 at hotmail.com
> To: at at lists.antique-tractor.com
> Subject: RE: [AT] grounds
> Date: Sat, 15 Dec 2007 07:56:45 -0500
>
>
> Mattias, you are right. In addition to the power company ground, the National electric code requires not only one ground rod, but two which are located a minimum of six or ten feet apart. (can't remember). Additionally, any sub service (barn, shop , garage, etc.) must also have a ground connection to its own copper rod / rods. Galvanized water pipes from in ground service used to be commonly used as a second ground point, but are no longer approved. Too much plastic plumbing both for water and natural gas and therefore unreliable. We may be getting confused here between common ground and equipment ground. Although they may all end up connected to the same ground point, common ground purely gives a path to make the electricity work, while equipment ground is meant to provide a ready path to stray current and prevent electrical shock to the machine user.
>
> To the textbook guys on the list: This is from only my understanding of the subject. Please forgive any incorrect terminology.
>
> Charlie
>
>
>
>
>   
>> Date: Sat, 15 Dec 2007 09:04:46 +0100
>> From: davidbrown950 at gmail.com
>> To: at at lists.antique-tractor.com
>> Subject: Re: [AT] : Ice Storm
>>
>> Henry? Am I right in assuming then that in the USA every house/electrical
>> has it's own grounding point opposite to how it works here. Because here
>> you got to have a switch that disconnects your own electrical system from
>> the net when connecting a generator. Since we have ground in the net I then
>> have to have my own groundingpoint (All that copper in the cround).
>>
>> John If the depth are enough depends on the kind of ground you got. There
>> are a lot of complex measuring to decide that.
>>
>> Though I have a lot knowledge about this but not being an electrician(My dad
>> is, I've actually worked as one :-o, and I've got a bunch of education to my
>> teflon-brain). I will not try to understand or explain the floating neutral
>> potential phenomenon (or something like that) that an electrician friend of
>> mine tried to explain to me. Anyway this has made electrical macinery like
>> fridges overheat and burning down houses here so be careful.
>>
>> /Mattias
>>
>>
>>
>>     
>
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