Grounded for two weeks...hopefully longer [RE-wrenches]

[Dean T. Newberry]

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David, Use #4 cul  deant

David Henry wrote:

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> We just had one of our installers get tagged by a county inspector 
> with a new one. He stated that the code says "all grounding conductors 
> smaller than #4 shall be in conduit". Therefore he wants all the the 
> #10 bare copper connecting the modules placed in conduit. Does anyone 
> have a rebuttal for us?
>
> I haven't had a chance to get to a code book yet nor is the inspector 
> returning our calls to give us the NEC  basis of his statement. Any 
> help would be greatly appreciated.
>
> Keep on the sunny side,
> David Henry
> Harmony Farm Supply
> 3244 Hwy 116 N.
> Sebastopol, Ca 95472
> voice 707-823-9125 X14
> fax 707-823-1734
> david at harmonyfarm.com
> www.harmonyfarm.com
>
> At 4:16 AM -0800 4/3/04, RE-wrenches at topica.com wrote:
>
>> Date: Wed, 31 Mar 2004 22:23:23 GMT
>> From: Jeff Oldham <starpower4u at juno.com>
>> Subject: RE: Grounded for two weeks...hopefully longer [RE-wrenches]
>>
>>
>>
>>
>> We just finished a 20 kW ground mount and my installer called me to 
>> say he
>> found a "better way to attach the modules, faster and cheaper, come 
>> take a
>> look". Fearing the worse I hustled on over and found that they used 
>> #10 SS
>> drill point screws w/SS washers up through the slotted channel and 
>> into the
>> frame wherever they could hit (no, not the manufacturers intended 
>> holes, but
>> within an inch or so). The first thing I noticed is that we now have 
>> a good
>> electrical connection between the module frame and the strut, bonding 
>> all
>> module frames to the entire structure. It looks like a reasonable 
>> direction
>> to consider as we explore ways to ground zillions of module frames 
>> together
>> on an array. I know we all want to see this get to the point of one 
>> ground
>> point per array. We still bonded all frames with lugs and #10 CU. We all
>> agree - there just has to be better way than this silliness.
>>
>> I just got back today from doing a tour for a group of 20 IBEW 
>> electricians
>> and when this issue of frame grounding came up they just could not 
>> believe
>> that our industry has not sorted this out and we have to "do it the hard
>> way".
>>
>> Come on manufacturers, help us out here, this cannot be rocket 
>> science! It
>> is pretty bad when it takes longer to ground a module than to mount it.
>>
>> -jeff o
>
>

-- 

 
* Cooperative Community Energy* 	*Dean T. Newberry*

430 D Street, Davis CA, 95616
Tel: 530 758-6064
Fax: 530 758-3684
Email: deant at dcn.org
Web:  CCEnergy.com       
      Talbott Solar <http://www.dcn.davis.ca.us/go/deant/>

Contr. Lic. # B-667908

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