Local authority · California
San Francisco — energy & appliance code adoption
Yes — effectively. SF layers Electrical, Building, and Fire Code amendments on the CA baseline. Ordinances 99-20 and 309-22 prohibit natural gas infrastructure in new construction and major renovations, effectively mandating all-electric appliances. Below: how San Francisco differs from California on appliance listing, NEC, fire code, and energy storage, with sources.
Is UL 858 required in San Francisco?
Yes — effectively. San Francisco requires fixed household appliances to be listed by a Nationally Recognized Testing Laboratory (NRTL), and UL 858 is the de-facto listing standard a household electric range must meet.
Are NRTL-listed (UL / ETL / CSA) appliances required in San Francisco?
Yes. San Francisco's adopted code requires fixed electrical appliances to be listed by an NRTL (UL, ETL/Intertek, CSA, etc.) — 2022 CEC Article 110.3 as amended by SF Electrical Code. NRTL listing required; SF DBI enforces.
Which edition of the NEC does San Francisco use?
San Francisco has adopted the 2020 edition of the National Electrical Code (NEC), effective 2023-01-01. Adopted via 2022 California Electrical Code (Title 24, Part 3) with SF Electrical Code amendments in SF Building Code.
Is UL 9540 required for residential energy storage in San Francisco?
Yes. San Francisco's adopted code requires UL 9540 listing for stationary energy storage systems (ESS) in dwellings. SFFD plan check mandatory for all residential ESS. Ord. 99-20 (2020) bans natural gas in new construction; Ord. 309-22 extends to major renovations, accelerating ESS deployment. CFC §1207.11 + 9540A required; >20 kWh aggregate triggers full §1207 commercial review.
Is UL 9540A fire-propagation testing required in San Francisco?
Yes. San Francisco's adopted code requires UL 9540A listing for energy storage systems.
What is the residential energy-storage capacity limit in San Francisco?
San Francisco limits residential energy storage to 20 kWh per dwelling unit.
Which fire code does San Francisco enforce?
San Francisco enforces IFC 2022 CFC (2021 IFC base). SF Fire Code administered by SFFD.
Code adoption summary
| NEC edition | 2020 NEC |
|---|---|
| Appliance listing (UL 858) | Effectively required |
| NRTL listing requirement | Required |
| Fire code | IFC 2022 CFC (2021 IFC base) |
| IRC edition | 2021 IRC |
| UL 9540 (residential ESS) | Required |
| UL 9540A propagation test | Required |
| Residential ESS cap | 20 kWh / dwelling |
| NFPA 855 edition | 2020 |
Sources
- SF Department of Building Inspection — Codes
- San Francisco Municipal Code
- SF Ordinance 309-22 (gas prohibition expansion)
- SF Fire Code 2022 (Article 12 / §1207)