Mark-
690.56(C) provides the placard you're looking for and 690.56(B) tells
the first responder where that 690.12 switch is, right?
For 2017 there are a couple of proposals out there. One is trying to
better educate that first responder (quickly!) as to what hazards exist.
Another is clarifying some of the language for 690.12 such that we
continue to have [better] array-level shutdown. Another is changing
690.12 to [basically] module-level shutdown, which has been signed onto
by the IAFF, insurance companies, and... some module-level electronics
vendors.
We've installed many, many rooftop systems but we're only about 0.1%
done with them. Regardless of how 690.12 changes, I think that in the
next few years we'll all be revisiting every system we've ever worked on
to make sure there's enough labeling to inform firefighters about the
hazards. I'm curious how we're going to do that so that a 2027
firefighter can quickly distinguish between 2014's Rapid Shutdown,
2017's Even Rapider Shutdown, 2020's BlockOutTheSun Shutdown, 2014's
Rapid Shutdown That Actually Still Works, 2011's System That Will Only
Shock You If You Cut Through a Module, and 2005's Never-Code-Compliant
system that incorrectly has a "Rapid Shutdown" label on it because the
homeowner noticed that their neighbor had one. Somehow we need to make
sure firefighters know exactly what they're up against.
Non-farcically,
DKC
On 2015/2/5 20:08, Mark Frye wrote:
...without a mandatory "Stop" switch co-located with the service meter
or main breaker?
How many roof top systems have been installed to date? Many, many, many,
many.
OK ,now I am a first responder showing up at a home that is on fire. How
do I know whether or not the DC has been installed such that it provided
the protections afforded by 690.12? I don't. Because it is not require
for systems conforming to 690.12 to look any different to me than those
that do not.
So does the "stop" switch become the new "fire fighters club" logo? If
you have the switch the FD will save your home, if you don't they will
let it burn down, even if you have a 690.12 compliant system that does
not include an "initiator switch"?
Mark Frye
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