Is Massachusetts 527 CMR 12.00 in force?

Yes. In force from Apr 24, 2026.

Which products does Massachusetts 527 CMR 12.00 affect?

Massachusetts 527 CMR 12.00 affects Residential energy storage systems, Commercial and utility energy storage systems, and Solar PV.

When does Massachusetts 527 CMR 12.00 take effect?

The effective date on file is April 24, 2026.

Massachusetts

527 CMR 12.00

PartialRead in the state’s own source. It stays partial until the passage is on file word for word.

What does Massachusetts 527 CMR 12.00 do? Requires installations permitted after Apr 24, 2026 to meet the 2026 National Electrical Code with Massachusetts amendments. It changes solar photovoltaic warning label rules, deletes Article 691, and requires outdoor service disconnects at one- and two-family homes.

Facts

Kind: Code amendment
Status: In force
Stage: In force
Signed or decided: April 24, 2026
Effective: April 24, 2026
Topics: Fire protection and siting, Permitting
Products: Residential energy storage systems Commercial and utility energy storage systems Solar PV
Source: Board of Fire Prevention Regulations, Department of Fire Services (opens in a new tab)
Citation: 527 CMR 12.00 (Massachusetts Electrical Code, based on the 2026 NEC)

The state’s codes

The codes that reach each product this law names, with the edition Massachusetts is on. Each links to the record.

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