I am working on system that has PV panels on a detached garage, from which the DC output is run back to main house where the inverters are. Inspector wants all ungrounded DC circuits to have disconnects at garage per 225.31. In this case, the strings are not combined, and it is an ungrounded PV system. There are 7 strings, so 14 ungrounded conductors. Using 2-pole disconnects for each string, that's 7 disconnects, which as I understand exceeds the max allowed of 6 per 690.14(C)(4).
So, my questions are:
Does 225.31 apply to DC source circuits for a separate structure, and if not, how can I prove this to inspector?; and,
If disconnects are required, can anyone suggest equipment, multi-pole disconnects I suppose, that can get total number of disconnects under 6?
Thanks.
So, my questions are:
Does 225.31 apply to DC source circuits for a separate structure, and if not, how can I prove this to inspector?; and,
If disconnects are required, can anyone suggest equipment, multi-pole disconnects I suppose, that can get total number of disconnects under 6?
Thanks.