[RE-wrenches] 690.31E (through a building)

[Joel Davidson]

Regarding the DC disconnect, the 2008 Handbook 690.14C(1) comments, "These requirements generally prohibit long runs of PV source and input circuits inside a building before reaching the required PV disconnect. A short conductor run through a wall at the point of first penetration to reach a disconnect mounted inside the building is allowed." I think an inspector could bump a long DC circuit through a building even if it was in conduit. What do you all think?

Joel Davidson
  ----- Original Message ----- 
  From: Bill Brooks 
  To: 'RE-wrenches' 
  Sent: Friday, December 18, 2009 8:32 PM
  Subject: Re: [RE-wrenches] 690.31E (through a building)


  Mark,

   

  The readily accessible disconnect at the inverter is all that is necessary according to the code. There may be practical reasons for additional disconnects, but if the system has no combiner box, or the combiner is at the inverter, only the disconnect at the inverter is required.

   

  Bill.

   

  From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mark Dickson
  Sent: Friday, December 18, 2009 3:25 PM
  To: 'RE-wrenches'
  Subject: [RE-wrenches] 690.31E (through a building)

   

  Hello there, 

  Due to a lot of concrete and asphalt, we are forced to run our PV source circuits in through one exterior wall, through a crawl space and out through the opposite exterior wall to our inverter and disconnect.  We will be using EMT and will not be making any stops while inside the building.  We will however need to place a couple of pull-boxes due the various required bends in excess of 360*.  Will we be required to place a DC disconnect at the "first readily accessible" point inside the building?

   

  Best regards,

   

  Mark Dickson,

  NABCEP Certified Solar PV Installer T

  Oasis Montana Inc.

   

   



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