[RE-wrenches] Rooftop DC disconnects

[Chris Anderson]

I am pretty sure it is in the draft of the 2011 code. While we are not governed yet by the 2011 code, I think it is good practice and is something we should all do sooner than later. Borrego is moving that direction as we speak. No reason to wait around for the code to tell us what we have to do. I would recommend getting an integrated load break combiner - there are several on the market already - and breaking the output circuits from the combiner immediately so that conduits running on the roof and through the building can be de-energized in the event of a fire.

-Chris Anderson
  Chief Technology Officer
  Resources Group 
  C: 603-732-2411
  Borrego Solar Systems


-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Troy Harvey
Sent: Tuesday, September 22, 2009 11:43 AM
To: RE-wrenches
Subject: [RE-wrenches] Rooftop DC disconnects

I am being told we need rooftop DC disconnects for a 6 string  
commercial solar install, instead of DC disconnects in the mech room.  
I don't see anything about this in the NEC. Any truth to this?


thanks

Troy Harvey
---------------------
Heliocentric
801-453-9434
taharvey at heliocentric.org

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