Indeed - I imagine this will be addressed in the not too distant future by Electrical codes. At considerable cost to... someone, one suspects... ... On 8/15/17, Brent Brown wrote: > When the fire department turn up they quickly spot the high voltage DC > equipment > sitting on top of your burning house, and correctly identify it as a haza= rd > > discouraging the use of water in the first instance to put out the fire. > > There are regulations for signage, which, if present and accessible, will > state how > and where to safely disable the PV generation equipment... only if time & > other > factors permit. > > If it's grid connected AC micro-inverters then it's fairly straight > forward... > anything/everything can be turned off in no particular order quite safely= .. > But with DC > systems it's far from simple, as discussed already. Even with load/invert= er > shut > down first then DC isolator switches turned off in the correct order the > solar array > itself can/will still be live and dangerous. We're asking fire fighters t= o > have as much > knowledge of solar PV systems as installers have... it's a real challenge > they have > to confront these days. > > Trying to covering the array to make it dark, while doing this at height,= on > top of a > burning house, sounds a bit improbable. When there is doubt, and there > certainly > can be in the heat of the moment - excuse the pun, the fall back position= is > that lives > are more valuable than possessions. > > On 15 Aug 2017 at 12:24, Sean Breheny wrote: > >> I'm not sure I get how the fire dept. example is related. Isn't it good >> that they waited (assuming there are no people trapped inside)? Or is th= e >> joke that they didn't realize that they could just make them safe with a= n >> opaque tarp? >> >> On Tue, Aug 15, 2017 at 11:00 AM, wrote: >> >> > > >> > > Funniest warning sticker I have seen lately, of course on a solar >> > > panel: >> > > "CAUTION: Creates electric current when exposed to light"... >> > > >> > >> > Yeah, it's a bit like the fire department turning up to a burning >> > building >> > and waiting to get the hoses out until the solar panels are made safe, >> > as >> > has happened in the UK ... >> > >> > >> > >> > -- >> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> > View/change your membership options at >> > http://mailman.mit.edu/mailman/listinfo/piclist >> > >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .