Codes of Record

What applies to my job?

Pick the state and the product you build, install, or inspect. The card below answers from each state’s own record.

Interconnection devices in California

Which codes apply? In California, interconnection devices fall under the 2023 NEC and the 2024 IRC.

Backup switches, gateways, meter adapters, and the device that islands a home. State record read Oct 18, 2026. Data as of Oct 26, 2026.

Codes that reach interconnection devices

The edition California enforces for each code that governs the product, and the part of the code that does.

  1. NECNational Electrical Code
    2023 NECVerified

    in force since Jan 1, 2026

    Where it reaches the product. Article 705 for the point of connection, 230 for the service, and 702 for optional standby systems.

    2025 California Electrical Code · Cal. Code Regs., tit. 24, pt. 3

    The 2026 NEC is in development for January 1, 2029.

    The California NEC record
  2. IRCInternational Residential Code
    2024 IRCVerified

    in force since Jan 1, 2026

    Where it reaches the product. Chapter 37 and the electrical provisions that mirror the NEC.

    2025 California Residential Code · Cal. Code Regs., tit. 24, pt. 2.5

    The 2027 IRC is in development for January 1, 2029.

    The California IRC record

California laws that name interconnection devices

On the site: seven laws, rules, orders, and bills, newest first.

Law or ruleKindStageDateWhat it does
AB 2493Legislative update dated Sep 30, 2026BillPartialIn forceSep 30, 2026Covers utility interconnection and a transmission development monitor at the Public Utilities Commission. Source (opens in a new tab)
SMUD Engineering Specification T014SMUD Engineering Specification T014, Revision 7, dated Feb 19, 2026RulePartialIn forceFeb 19, 2026Allows only utility-approved meter socket adapters, on single-meter residential services of 200 amps or less, with exports capped at 20 kW. Source (opens in a new tab)
AB 1408Legislative update dated Oct 3, 2025BillPartialDid not passOct 3, 2025Proposed requiring utilities and the grid operator to evaluate and integrate surplus interconnection capacity on the transmission system. Source (opens in a new tab)
CPUC Rulemaking R.25-08-004Commission orderVerifiedPendingAug 20, 2025Studies refinements to Rule 21 interconnection rules for distributed energy resources at the large and small utilities. Source (opens in a new tab)
CPUC Resolution E-5364CPUC Resolution E-5364 (Energy Division own motion; Agenda ID 23299)Commission orderPartialIn forceMar 13, 2025Sets the bill savings estimate in the Contractors State License Board's Solar Energy System Disclosure Document to the 12 months after installation. Source (opens in a new tab)
Electric Rule 21 Section HhElectric Rule 21 Section Hh (smart inverter requirements); CPUC D.14-12-035TariffPartialIn forceSep 8, 2017Requires inverters on interconnecting distributed resources to perform seven autonomous functions from Sep 8, 2017. Later phases added communication and advanced functions under Rule 21 Section Hh. Source (opens in a new tab)
Electric Rule 21Electric Rule 21 (PG&E, SCE, and SDG&E tariffs)TariffPartialIn force–Requires customers installing generation or storage on their premises to meet the large utilities' interconnection, operating, and metering requirements. Source (opens in a new tab)

Every California law on interconnection devices, with filters

For information only. Your local building or fire official decides which code applies. We check state records often but can miss a recent change, so confirm with your official before you design, permit, or install. Terms of use