[RE-wrenches] PVC running through the house

[Peter Parrish]

The Code back then was a little vague back then and I am not sure it has
been improved.

First, there needs to be a DC disconnect just before or just after
penetrating the building shell. Most AHJ allowed us to place this disconnect
in the attic within reach of the access door. Once we needed to place the DC
disconnect on the roof and we were able to get away with a fused combiner
box. Another time we actually needed to put a 600V 3-pole fused disco on the
roof.

Second, and this is really an obscure point. Only conduit, raceways and the
like (not cable runs) were allowed in the attic space and walls. So FMC is
okay but MC is not. It is an issue of unfortunate terminology.

Third, you need to label the conduit “Caution – Solar Circuit”, even in the
walls.

Finally, where the conduit passes thru studs, you need protection plates on
the studs to prevent screws or nails piercing the conduit.

That’s my story and I’m sticking to it.

-Peter

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com  
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885

 
________________________________________
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Keith Cronin
Sent: Thursday, April 07, 2011 3:05 PM
To: RE-Wrenches
Subject: [RE-wrenches] PVC running through the house

Hi folks

Was wondering- does anyone know back in 2005, if it was permissible to run
DC conductors from the roof, through the home to the inverter location,
inside the house, per the NEC?

Thanks 

Keith Cronin