[AT] grounds

[Gene Waugh Elgin, Illinois USA]

 From what I saw, it was about 20 years ago that codes relating to 
mobile homes started requiring the four wire hookup for 220V appliances. 

/-- 
Gene
Gene Waugh
Elgin, Illinois USA/


Mogrits wrote:
>> cgogol at twcny.rr.com writes:
>>
>> The feed  from there to the subpanel in the basement is 4 wire (two
>> hot, a neutral  and one connected to the ground network).  Then the added
>> feed from  that subpanel (and any subsequent subpanel) is also 4
>> wire.  Maybe
>>
>> this is the reason additional attachments to earth ground at
>> subpanels are
>> not desired / required.
>>
>>
>>
>> Carl,
>>
>> I believe that is correct. See my reply and quote in the answer
>> to  Dudley.
>>
>> Gary
>>     
>
> I'm certain the number of conductors figures into the equation. I ran
> four-conductor wire upon his advice, as stated, with no ground rod at the
> shop. Back then (6-7yrs ago) the cost of the wire wasn't as big an issue.
>
> I used 4-conductor mobile home service wire. I think the practice is similar
> where it deals with a mobile home. After all, the building/MH is separate
> from the sevice and the inside panel is merely a distribution panel. They
> don't require a separate ground rod for the interior panel in a mobile home,
> only one at the service.
>
> Warren
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