[RE-wrenches] How Is Rapid Shut-Down Not A Farse...

[Dave Click]

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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