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    Electrical Code Adoption

    Illinois Electrical Code: NEC 2020

    Illinois follows NEC 2020 as the basis for electrical work. Permits and inspections are issued by the local Authority Having Jurisdiction (AHJ), which may publish additional amendments.

    Adoption details

    Model code family
    NEC (NFPA 70)
    Adopted edition
    NEC 2020
    Last verified
    2026-05-29

    Note: No statewide NEC adoption in Illinois — home-rule jurisdictions adopt independently. Chicago publishes its own Electrical Code.

    Related resources for Illinois

    Frequently Asked Questions

    What electrical code does Illinois use?

    Illinois currently follows NEC 2020 for electrical work. Always confirm the in-force edition with the local Authority Having Jurisdiction (AHJ) — county or city amendments can apply.

    Do I need a permit for electrical work in Illinois?

    Most electrical work in Illinois — including new installations, system replacement, and gas-fueled appliance hookups — requires a permit from the local building department and an inspection at completion. Homeowner permits are typically allowed for owner-occupied residences; commercial work requires a licensed contractor.

    Where do I check Illinois electrical code amendments?

    Local jurisdictions (city or county) often publish amendments on the state's building-codes board website or in the municipal code. The current NEC 2020 text is published by its model-code body (ICC, IAPMO, or NFPA depending on the trade).

    Are there any unusual electrical requirements in Illinois?

    No statewide NEC adoption in Illinois — home-rule jurisdictions adopt independently. Chicago publishes its own Electrical Code.

    Reference guidance only — adoption editions and local amendments vary by city or county. Always confirm requirements with your local Authority Having Jurisdiction (AHJ) before designing, permitting, or constructing.

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