> On January 1, 2019 at 6:11 PM Karl Wittnebel via Mercedes > <mercedes@okiebenz.com> wrote: > > > Yes they can't have a bunch of residential panels backfeeding into the > downed lines I suppose! But who monitors that they get shut down?
I'm pretty sure every grid-tie inverter ever sold in USA stops backfeeding the grid the second the grid goes down, certainly every US or CSA listed inverter does that. What I'm talking about, what I believe Dan is talking about, is the need to kill the DC power in ten seconds (I misstated when I said 30 seconds) so that firefighters don't run into 600V DC while cutting a hole in the roof with a rescue saw. That didn't enter the code until the 2014 version, the 2011 NEC is silent on that subject. Mitch. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
