Electrical Code Adoption

Massachusetts Electrical Code: NEC 2023

Massachusetts follows NEC 2023 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 2023
Last verified: 2026-05-29
Source: Adoption tracker

Note: Massachusetts Electrical Code (527 CMR 12.00) is based on NEC 2023 with state-specific amendments.

Related resources for Massachusetts

Frequently Asked Questions

What electrical code does Massachusetts use?

Massachusetts currently follows NEC 2023 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 Massachusetts?

Most electrical work in Massachusetts — 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 Massachusetts 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 2023 text is published by its model-code body (ICC, IAPMO, or NFPA depending on the trade).

Are there any unusual electrical requirements in Massachusetts?

Massachusetts Electrical Code (527 CMR 12.00) is based on NEC 2023 with state-specific amendments.

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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