Earlier editions: 2026-09
Title 9 — CONSTRUCTION CODES AND FIRE CODE›Division 2 — COUNTY BUILDING CODE›Chapter 1 — COUNTY ADOPTION OF THE CALIFORNIA BUILDING CODE WITH COUNTY AMENDMENTS
San Diego County Municipal Code § 3120.3 Conduit for future solar photovoltaic system
San Diego County Municipal Code · 2026-10 edition · updated 2026-10-03 · San Diego County
Cite as: San Diego County Municipal Code § 3120.3 · Text as of 2026-10-03
Newly constructed single-family dwelling units shall include electrical conduit installed per Sections 3120.3.1 through 3120.3.3 to accommodate future installation of a roof-mounted solar photovoltaic system.
Sec. 3120.3.1 Location.¶
One conduit run shall originate at a readily accessible attic location with proximity to solar zone area complying with Section 3120.1 and terminate at a minimum 4-inch-square approved electrical junction box located within 72 inches horizontally and 12 inches vertically of a main electrical panel complying with Section 3120.2. A second conduit run shall originate at the electrical junction box and terminate at the main electrical panel.
Sec. 3120.3.2 Size. The conduit shall be minimum 1-inch-diameter listed electrical…¶
Sec. 3120.3.3 Identification.¶
The electrical junction box and the segment of conduit run in the attic shall be permanently and visibly marked as "For Future Solar Photovoltaic."
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