EMT - UL Heads Up [RE-wrenches]

[Dean T. Newberry]

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Hi y'All,
    Let me throw a tangential argument into this discussion.
    I have a copy of a report on the RF emissions from the DC wiring 
leading from the array to an un-named inverter. The RF was strong enough 
to interfere with an amateur radio station a quarter of a mile away. I 
passed the information along to John Wiles and an inverter manufacturer. 
We agreed for the time being that best practice would be to use an 
approved metallic raceway for the riser from the DC disconnect to the 
array to reduce radio frequency interference.
    So, we no longer use the plastic alternatives.

cul  deant


Mo Rousso wrote:

>>Following up on the PVC issue:  I spoke to a representative from Carlon
>>some time ago about UV resistance.  Apparently it doesn't say that on the
>>pipe for no reason.  Any UV discoloration of PVC is only a few microns
>>thick.  It does not compromise the structural integrity of the product in
>>any way.  I'd actually like to have PVC on my roof for 20 years over EMT
>>(especially in any marine proximity).  Remember, beauty is only skin deep,
>>but rust can go all the way through!
>>
>>    
>>
>
>That's good to know about the PVC.  And I agree with the rust issue.  I
>guess time will tell if PVC is a superior solution since we have put in
>quite a number of these since the rule change.
>  
>

-- 

 
* 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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