NFPA 70, the National Electrical Safety Code, describes
requirements for rapid shutdown of photovoltaic arrays
in Article 690.12. Most local Authorities Having Jurisdiction
(local building code boards) adopt NFPA 70 requirements,
but not all do. First responders (primarily firefighters) are
aware of the rapid shutdown requirement for photovoltaic
systems mounted on buildings - spraying an occluding
substance over a PV array should not be necessary. If
a PV system is installed in violation of local codes that
incorporate NFPA 70 by reference, that is another matter
entirely. Article 690.12 doesn't prevent potentially
hazardous voltages from being present on building-mounted
PV systems even if the rapid shutdown function has been
activated (e.g. DC disconnect of the array modules by a
manual switch), but it does limit the extent of the hazard.
Mike, K8CN
(father of paramedic/firefighter, and licensed Professional Engineer)
________________________________
From: RFI <rfi-bounces+mike.carter=unh.edu@contesting.com> on behalf of Bob
Kozlarek WA2SQQ <wa2sqq@gmail.com>
Sent: Tuesday, December 13, 2022 5:10 PM
To: rfi@contesting.com <rfi@contesting.com>
Subject: [RFI] NIMBY - Here’s how I dissuade my neighbors
CAUTION: This email originated from outside of the University System. Do not
click links or open attachments unless you recognize the sender and know the
content is safe.
I’ve had a few people in my neighborhood consider installing solar panels.
I spoke to our fire inspector about the protocol the department has for
fighting a fire involving solar panels on the roof. Short version of the
long story is they will not go up on a roof or engage with the fire until
the panels are disabled. They are looking into a black tar like spray that
could be applied to the panels to disable them. He explained that the light
on an evening from a full moon can produce enough voltage to be very
hazardous to a fire fighter. New Jersey solar panel installers also
deceptively don’t inform the customer that they are signing away their
energy credits. In three cases, when my neighbors found out about this,
their response was thanks but no thanks I’m not interested. --
*Best 73 de WA2SQQElmwood Park, NJ"The only dumb questions are those we
don't ask"*
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