Isn't the 2014 NEC going to require a "quick disconnect" for all new PV systems? I thought that I read it somewhere.
Hi Harold...this is from the 2014 NEC draft...
690.12 PV Arrays on Buildings Response to Emergency
Shutdown. . For PV Systems installed on roofs of buildings,
photovoltaic source circuits shall be deenergized from
all sources within 10 seconds of when emergency shutdown
is initiated or when the PV power source disconnecting
means is opened. When the source circuits are deenergized,
the maximum voltage at the module and module conductors
shall be 80 volts.
And here is a link to a piece of equipment that will do the job...
http://www.solarbos.com/products/combiner-boxes/contactor-combinersshortcircuit