PV source circuit disconnect location [RE-wrenches]

[Allan Sindelar]

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Daniel,
Here's John Wiles' response, forwarded through us:

The Exception to 690.14(C)(1) is a part of 690.14 and if you can meet 
the requirements of 690.31(E), which refers back to 690.14, you can 
place the disconnect in any readily-accessible location reached by 
the metallic raceway. You are, in fact, complying with 690.14 when 
you do this since the exception is a part of that section.  Roof 
tops, where the PV source or output circuits would presumably 
penetrate the building, are not considered to be readily accessible. 
Incidentally, Metal Clad (Type MC)  and Armored Cable (Type AC) cable 
assemblies are not considered to be metallic raceways.  Also, 
aluminum-jacketed type AC cable assemblies are not listed for use 
with direct current circuits.

Allan

----- Original Message ----- 
From: "Daniel Flanigan" <daniel at cal-solar.com>
> 
> Aside from the fact that its a good idea to do so, when running PV 
> source circuits through a building in metal conduit, do you or do you 
> not have to have a disconnect in accordance to 690.14(C)(1)?  
> 
> There seems to me to be a circular reference in the code.  690.14(C)(1) 
> reads that a disconnect must be located outside or inside at the nearest 
> point of entry.  Then there is an exception allowing the disconect to be 
> remote from that point for installations that comply with 690.31(E) 
> which requires the use of metal conduit.  But 690.31(E) requires that 
> the disconect comply with 690.14(A)-(D) which require the disconnect to 
> be outside or at the point of entry.  Does the exception prevail?

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