Fontana, CA Building Safety: Electrical Permits (2026)
Key Facts
- Adopted code
- 2025 CEC / 2023 NEC base
- Aluminum conductor rule
- No. 6 or smaller needs torque inspection
- Outside wiring
- New wiring must be underground
- Latest amendment
- Ord. No. 1975, 10-28-25
- Max misdemeanor fine
- $1,000 or 6 months jail
Summary
Fontana requires all electrical work to meet the 2025 California Electrical Code, based on the 2023 National Electrical Code, adopted under Sec. 5-111. Sec. 5-112 layers on two local amendments: mandatory torque inspection for small aluminum conductors and a general requirement that new outside wiring on private property run underground.
Sec. 5-111. - Adoption; copy on file. The 2025 Edition of the California Electrical Code, known as the California Code of regulations, Title 24, Part 3, based on the 2023 Edition of the National Electrical Code, published by the National Fire Protection Association is hereby adopted as the electrical code of the city... Sec. 5-112. - Changes and amendments. (a)Section 110.5... amended by adding thereto the following: Aluminum conductors of No. 6 or smaller shall require continuous inspection by an approved independent testing agency for proper torquing of connections at their termination point. (b)Section 225.1... amended by adding thereto the following: All new outside wiring on private property shall be underground. EXCEPTION No. 1: Temporary wiring installed per Article 590. EXCEPTION No. 2: Services as defined by Article 100 and installed per Article 230, subject to approval by the Administrative Authority. EXCEPTION No. 3: Wiring in approved conduit and raceways directly attached to a building.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 64 | Zoning and Development Code: Supplement 17).
Full Breakdown
Every electrical permit issued in Fontana is reviewed against the 2025 Edition of the California Electrical Code (California Code of Regulations, Title 24, Part 3), adopted wholesale by Sec. 5-111 with a copy kept on file in the city clerk's office. The city does not simply defer to the state text: Sec. 5 of the CEC to require that aluminum conductors of No. 6 gauge or smaller receive continuous inspection by an approved independent testing agency to verify proper torquing at their termination points, a rule aimed at preventing loose-connection fires in smaller residential services.
Sec. 1 of the CEC so that all new outside wiring on private property must be installed underground, not overhead. That undergrounding mandate carries three named exceptions: temporary wiring installed under Article 590, services defined by Article 100 and installed per Article 230 (subject to the administrative authority's approval), and wiring run in approved conduit or raceways directly attached to a building. The current version traces to Ord. No. 1975, § 5, adopted October 28, 2025, which re-adopted the article to update the base code cycle; earlier amendments run back through Ord.
No. 1681 (2013), Ord. No. 1756 (2017), Ord. No. 1820 (2019), and Ord. No. 1907 (2022). Permit applicants should expect plan check and field inspection against both the unamended CEC provisions and these two local add-ons before rough-in or final sign-off.
Violations & Fines
Working without a permit or installing above-ground outside wiring without qualifying for one of the three exceptions is a Code violation under the city's general penalty, Sec. 1-7: a misdemeanor punishable by up to $1,000.00 and six months in jail, or an infraction capped at $500.00, at the city attorney's discretion, with each day of continuing violation a separate offense.
Frequently Asked Questions
Which electrical code does Fontana enforce?
Does Fontana require underground wiring on private property?
Is there an extra inspection step for small aluminum wiring?
Sources & Official References
Other rules in Fontana
California rules heatmap·Compare Fontana to another location·View the California building safety overview
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