I'm planning to install a new pv array. I have a combiner box in the outbuilding mounted by the inverter. I was planning to run the mc4 cables through an existing penetration in the roof and in metal conduit to the combiner box. My question is should I run the 6 awg pv grounding wire in the conduit to the combiner box grounding bar or should I run this separately to the common system ground either inside or outside the building?
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