600 VDC switches [RE-wrenches]

[Allan Sindelar]

We have one system we installed in '99 where the inspector insisted that the
code required an array disconnect. The system was roof-mounted on a shop
outbuilding, so no array GFDI. It was also grid-tied, and the main service
entrance was on the same roof. So we put a 2P QO2-4/70RB disconnect about
two feet over from the utility service weatherhead, on a similar riser above
the metal roof. It's never been used and never will be. The inspector passed
it.
Allan

----- Original Message -----
From: "Phil Undercuffler, Positive Energy" <phil at positiveenergysolar.com>
 > > there is a move afoot from the Fire Marshalls to require roof-mounted
> > disconnects for system that have DC wiring internal to the building.
>
> I think that qualifies as the dumbest idea I've heard in a long time, and
it
> should be pointed out to said Marshalls.

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