[RE-wrenches] New Construction Enphase Romex / NM

Jason Szumlanski jason at floridasolardesigngroup.com
Tue Jul 26 09:07:38 PDT 2016


It seems like most jurisdictions are now allowing a transition to Romex in
a Soladeck box where the Romex enters the attic immediately and runs in
protected space all the way back to a load-side interconnection or combiner
panel. Two issues:


   - How are you bringing the Romex into the back of the Soladeck? Standard
   metallic strain relief or strain relief with rubber compression gasket or
   other means?
   - Assuming you can't use a Soladeck due to the roof type and are using a
   standard PVC roof junction box mounted to a rail with conduit to get into
   the attic, are you transitioning from Enphase cable to THWN-2 in the j-box,
   then installing a PVC or metallic pass-through box in the attic to
   transition to Romex? Even though it's a short distance from the j-box to
   the point where the conduit penetrates the roof plane, it's still a wet
   location so Romex isn't allowed. In fact, some jurisdictions are requiring
   this even for Soladeck boxes because they consider the Soladeck an
   enclosure in a wet location so the inside must also be considered a wet
   location, making the transition to Romex improper in their opinion.



Jason Szumlanski
Florida Solar Design Group
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