Hello, My organization is troubled by a recent question raised about the Rapid Shutdown Requirements of a Ground mount system which has AC conductors entering a building for interconnection.
In NH the guidance is the 2017 edition of the NFPA 70, and requirements stated in section 690.12. Back in 2014 this section stated that for a system like this RSD was required for "PV system conductors of more than 1.5m(5ft) in length inside a building or more than 3m (10ft) from a PV array." In our case we don't fit either of those with only 1' of AC conductors inside this building. However in the 2017 version there is no clarification on length of these conductors inside the building.
The question is: Would a ground mount like this, with only AC conductors entering the building (of 1' in length) require RSD? and if so, would that be necessary on the AC and DC side of the PV array? What defines "Controlled Conductors" in this scenario?
Thanks for your time and help with this question.