interior DC runs [RE-wrenches]

[Peter Parrish]

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You're right. I'm mixing code with our local SoCal authorities. 

To begin with, all of my experience in this area has been with new
construction. So, in all cases the PV modules have been on the roof and that
is where the penetration takes place. In every case, it has been some
distance between the point of penetration and first place a disconnect could
be placed that would satisfy the code (accessibility, placement/clearances).
Our inspectors will not allow the disconnect to be placed in an attic space
that requires a ladder or any "tool" to access the disconnect.

I read an earlier post that mentioned "8 foot minimum run" before the
disconnect. I can't find that in the code, so I don't rely on this concept.

Finally, I'm not sure I understand your last point. Could the run after the
disconnect be other than metal conduit? If so, what could one use? 

- Peter

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave.
Los Angeles, CA 90065
Ph 323-258-8883
Mobile 323-839-6108
Fax 323-258-8885
peter.parrish at calsolareng.com 

-----Original Message-----
From: Ryan Mayfield [mailto:ryan at energyoutfitters.com] 
Sent: Thursday, December 22, 2005 2:43 PM
To: RE-wrenches at topica.com
Subject: RE: interior DC runs [RE-wrenches]

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Peter, 

Can you clarify why you say the DC disconnect needs to be on the outside
of the building? Section 690.14 indicates the disconnect can be inside
the nearest point of entry. There is also an exception there that
directs you to 690.31(E) that allows you to run through metallic conduit
to the first readily accessible disconnect. 

What am I missing?


>The DC disconnect must be on the _outside_ of the building shell. 

>- Peter 

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