The IRC Tag on July 31 reviewed the rooftop photovoltaic (PV) language in the existing amendments and flagged a circular reference that points users from the solar-energy section to R907 and then back again. Dustin (staff member) recommended reverting the state amendment text to the model-code base language for rooftop-mounted PV systems and to maintain Washington exceptions. Several tag members agreed that the R907 pointer creates circular navigation and that the base 3‑29 text already references NFPA 70 for the electrical work.

Why it matters: rooftop PV design and inspection involve both building-code requirements (roof attachments, structural loads) and electrical-code requirements (conductor sizing, overcurrent protection). The tag’s decision affects clarity for permit applicants and inspectors about which code sections and standards to follow.

Dustin said, “NFPA 70 is listed above, under 3 29.3 where it says the electrical portions of solar PV system shall be designed and installed in accordance with NFPA 70.” Tag members agreed to remove the circular R907 pointer and return the section to base-code language; some recommended retaining explicit NFPA 70 reference in the PV-specific section so users can find the electrical requirements without circular navigation. The tag did not adopt a final text change at the meeting but recorded the recommended edit for the staff proposal process.

Staff will return with a proposed amendment that replaces the R907 pointer with the model-code text and confirms whether to include an explicit NFPA 70 reference in the PV section. The item remains open for the next meeting.