2005 code question [RE-wrenches]

[Jeff Yago]

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Installing higher voltage array grid tie system.  Normally we route from fused array combiner to inverter down outside wall to exterior dis-connect (no fuses), then to interior inverter(s).   Client's architect vetoed exterior conduit and wants to route through roof and down inside exterior wall to above described exterior dis-connects at ground level.

We have been designing to 2005 code although this county still using older code.  New section 690.31 (E)  "Where direct-current pv output circuits are run inside a building, they shall be contained in metallic raceways from point of penetration to first accessible dis-connect."

also,

Section 690.14 (C) 5. Grouping. "The pv dis-connecting meansshall be grouped other dis-connecting means....."

Question - Does this require Intermediate Threaded Metal Conduit or is EMT allowed? How about conduit above roof line?

Question - I think inspector may ask us to move the DC array dis-connect from back of house to side where meter base and AC dis-connect are located due to above.  Does this mean up to 6 array dis-connects shall be grouped together, or ALL power source dis-connects to house grouped together?

Thanks,
Jeff Yago




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