PV source circuit disconnect location [RE-wrenches]

[Dan Rice]

Daniel,

The exception in 690.14(C)(1) is intended to allow you to place the PV
disconnecting means inside of the structure at a location that is remote
from the point of entry of the conductors -provided that the conductors are
run in metallic raceways and enclosures pursuant to 690.31(E).

What troubles me about 690.31(E) is that the text refers to PV "source or
output circuits of a utility-interactive inverter..." This language seems to
mean that 690.31(E) does not apply to PV source or output circuits of non
utility-interactive systems -i.e. off grid systems. Do off-grid roof mounted
arrays still have to have the array disconnect located on the outside of the
structure "or inside nearest the point of entrance of the system
conductors?" Why would it be different for off-grid vs. utility interactive
PV source-output circuits?

Dan Rice
Abundant Sun, LLC.


----- Original Message ----- 
From: "Daniel Flanigan" <daniel at cal-solar.com>
To: <RE-wrenches at topica.com>
Sent: Monday, May 22, 2006 6:12 PM
Subject: PV source circuit disconnect location [RE-wrenches]


|
| Wrenches:
|
| 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?
|
| Daniel Flanigan
| Owner
| California Solar Electric Co.
| (530) 274-3671


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