[RE-wrenches] Rapid Shut Down and the 10 Second Rule Questions

[Glenn Burt]

Chris,
I am not seeing any code reference to AC being affected by 690.12. in fact
it seems to specifically address only DC circuits.
In Mike Holt's new PV and the NEC book, his note recommends that the rapid
shutdown initiator be located near the service equipment, however this is
not addressed by the code.

-Glenn Burt

-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Christopher Warfel
Sent: Monday, February 02, 2015 10:34 AM
To: RE-wrenches
Subject: [RE-wrenches] Rapid Shut Down and the 10 Second Rule Questions

We have a interpretation problem among some people I work with with, and
690.12 Rapid Shut Down and the the 10 second time for reducing ac and dc
conductors to 240ma, and 30V.  The word "initiation" seems to indicate that
all affected conductors need to be at these levels within
10 seconds of de-energizing either the ac or dc conductors. If so, then the
disconnects need to be co-located to meet this requirement if this
interpretation is correct.

I have read Mr. Brook's article in Solar Pro, but AHJs may feel differently.

Would anyone care to weigh in on their interpretation?

Thank you, Chris





--
Christopher Warfel, President
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
401-466-8978