I just had a conversation with a plan checker in LA County yesterday on that very topic. When I directed him to NEC 690.14(C)(1) & 690.31(E): 690.14(C)(1) Location. The photovoltaic disconnecting means shall be installed at a readily accessible location either on the outside of a building or structure or inside nearest the point of entrance of the system conductors. Exception: Installations that comply with 690.31(E) shall be permitted to have the disconnecting means located remote from the point of entry of the system conductors. 690.31(E) Direct-Current Photovoltaic Source and Output Circuits Inside a Building. Where direct current photovoltaic source or output circuits of a utility-interactive inverter from a building integrated or other photovoltaic system are run inside a building or structure, they shall be contained in metallic raceways or enclosures from the point of penetration of the surface of the building or structure to the first readily accessible disconnecting means. The disconnecting means shall comply with 690.14(A )through 690.14(D). After we discussed these articles and the appropriate labeling of the metallic conduit, he waived the requirement. Brian C. White Sr. Design Engineer - PV Systems Eagle Roofing Products 120 North Auburn Street - Suite 212 Grass Valley, CA 95945 Phone: 530-273-2948 Cell: 530-575-5550 e-mail: [email protected] <mailto:[email protected]>
________________________________ From: [email protected] on behalf of Nick Vida Sent: Tue 9/22/2009 6:38 PM To: wrenches Subject: [RE-wrenches] Rooftop DC disconnects this is already required in Los Angeles county in a county ordinance. They are looking for dc disconnect directly after any combiner box and no conduit entering a building without disconnect- both commercial and residential. You wont see it in NEC unless you look in the 2002. I dont have the ordinance handy, but the plan check in those offices have the reference.
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