This is 2014 NEC 690.12 from the softbound PDF:
690.12 Rapid Shutdown of PV Systems on Buildings.
PV system circuits installed on or in buildings shall include
a rapid shutdown function that controls specific conductors
in accordance with 690.12(1) through (5) as follows.
(1) Requirements for controlled conductors shall apply
only to PV system conductors of more than 1.5 m (5 ft)
in length inside a building, or more than 3 m (10 ft)
from a PV array.
(2) Controlled conductors shall be limited to not more than
30 volts and 240 volt-amperes within 10 seconds of
rapid shutdown initiation.
(3) Voltage and power shall be measured between any two
conductors and between any conductor and ground.
(4) The rapid shutdown initiation methods shall be labeled
in accordance with 690.56(B).
(5) Equipment that performs the rapid shutdown shall be
listed and identified.
I have a lot of reading to do, starting thru the NFPA version of the '14 Changes.
