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.

Plug-in solar in Montana

Which codes apply? In Montana, plug-in solar falls under the 2023 NEC and the 2024 IRC.

A small array with its own inverter that plugs into an ordinary outlet. State record read Oct 20, 2026. Data as of Oct 26, 2026.

Codes that reach plug-in solar

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

  1. NECNational Electrical Code
    2023 NECPartial

    in force since Sep 26, 2026

    Where it reaches the product. Article 690 and 705 as written, which is why states write a statute to let the device plug in.

    National Electrical Code (NFPA 70) under the Montana state building code · ARM 24.301.401

    The Montana NEC record
  2. IRCInternational Residential Code
    2024 IRCPartial

    in force since Sep 26, 2026

    Where it reaches the product. Chapter 39, receptacles and branch circuits.

    International Residential Code, 2024 Edition, as adopted in the Montana state building code · ARM 24.301.154

    The Montana IRC record

Montana laws that name plug-in solar

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

No Montana law or rule on the site names plug-in solar. 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