But, what about...
But, what about...
I have an installation coming up that will be roof-mounted to an "adjacent" structure (read: 120ft from the house, approx. 220 ft conductor run from inverters to the meter where the required utility disconnect will be) which has a separate service from the house, but the inverter outputs will only be tied to the main residence's service. The system is large enough that we can't interconnect on the load side, so here I've stumbled trying to figure out the new language of 2014's 705.31 and rules for connecting to the supply side of the service disconnect.
The conductors for the run were sized for the voltage drop (running 4/0 aluminum) and per 705.65(A) Exception (2), an OCPD "shall not be required" for the inverter output conductors if the "short circuit currents from all sources do not exceed the ampacity of the conductors".
Well, 4/0 aluminum's ampacity is 205, and the panel combining the two inverters' output has OCPD for each of those smaller branches. If the conductors and equipment are out of harm's way here, and the disconnect allows for the opening of the circuit regardless of fusing, then isn't the code intention of 705.31 satisfied?
Still putting in a fused disconnect at the end of the day for peace of mind here, but I see these as contradictory given certain circumstances.