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  • Rapid Shutdown 




    The major implication of the section 690.12 of NEC 2014 is on Solar PV inverter-integrated GFP (Ground Fault Protection). What are the requirements of section 690.12 from NEC 2014?

     PV System Circuits installed on or in buildings shall include a Rapid Shutdown function that controls specific conductors as follows:
     Requirements for controlled conductors shall only apply to PV System conductors of more than 5 FT inside a building or 10 FT from a PV Array.
     Controlled conductors shall be limited to not more than 30 volts and 240 volt-amperes within 10 SECONDS of shutdown.
     Voltage and power shall be measured between any two conductors and between any conductor and ground.
     The rapid shutdown methods shall be labeled as such: PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN (in white, capitalized, reflective letters on a red background, at least 3/8 inch tall). The required wording is “PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN.”

    Equipment that performs the rapid shutdown shall be listed and identified:-

    Conductors associated with a PV system, whether AC or DC must be able to be de-energized on demand, so that any portions of the conductors that remain energized do not extend more than 10 feet from the PV array or more than 5 feet within a building.

    Rapid-shutdown requirements provide a zone outside of which the potential for shock hazard has been eliminated. Conductors more than 5 feet inside a building or more than 10 feet from an array will be limited to a maximum of 30 V and 240 VA within 10 seconds of shutdown.

    sma rapid shootdown box
     [Tech Support] Read from Knowledge Base and download a pdf file @ Article:   NEC 2014 and Section 690.12 Rapid Shutdown 

    The information posted herein has been compiled by Clean Energy Brands from OEM product data and reputable publications. All rights reserved!



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