Midnite Solar has some DC arc fault equipment both built into their
charge controllers (for battery based systems) and their Combiner
boxes. The nice thing about having AFCI at the combiner is that it
actually protects the wiring from the array to the inverter, so if an
arc is occurring in say the attic, it will interrupt the electricity at
its source, not at the load.
Ray Walters
On 10/13/2012 9:12 AM, Rebecca Lundberg wrote:
Dear fellow wrenches,
Does anyone have suggestions for the 'best' way to keep up with
product availability for meeting 690.11 on DC AFCI? I understand that
when this code section was written there was no available device, and
know that at least several companies are working on devices. How will
I know (before the AHJ knows :-) that residential-scale products are
available for purchase, and at what point would you say now should be
required over every other option?
Second question: I have an inspector insisting that the solar PV
system is the same as a utility service, and is requiring all of the
required service code references to apply. Anybody have a concise
reference that might convince him otherwise? This same inspector has
decided that the electrical permit will have adders for each inverter
as service equipment, and each module as an electrical device. It
would sure be nice if there was more consistency...we're still in the
early adopter phase here in Minnesota.
Thanks in advance for your input.
Keep Shining!
Rebecca Lundberg
NABCEP Certified Solar PV Installer ®
Owner/CEO, Powerfully Green
rebecca.lundb...@powerfullygreen.com
763-438-1976
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