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 Maryland

Which codes apply? In Maryland, interconnection devices fall under the 2017 NEC and the 2021 IRC.

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

Codes that reach interconnection devices

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

  1. NECNational Electrical Code
    2017 NECPartial

    Statewide, with exceptions

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

    COMAR 29.06.01 (State Fire Prevention Code); COMAR 09.12.50.02-1B (Model Performance Code)

    The 2023 NEC is in development.

    The Maryland NEC record
  2. IRCInternational Residential Code
    2021 IRCVerified

    in force since May 29, 2023

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

    Maryland Building Performance Standards · COMAR 09.12.51; Public Safety Article 12-503

    The Maryland IRC record

Maryland laws that name interconnection devices

Statutes, rules, and commission orders are tracked state by state.

No Maryland law or rule on the site names interconnection devices. The product page shows the states that have one.

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