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Low-voltage licensing

Massachusetts

State-level license requiredLast verified May 23, 2026

Massachusetts requires Electrician licensing through the Board of State Examiners of Electricians (Division of Occupational Licensure). Class B (Systems Contractor / Technician) is the specific category for low-voltage, fire alarm, and telecom installation. Class A is full electrical. Boston and other major cities layer additional permit and inspection requirements on top of the state license.

Regulatory agency

Massachusetts Board of State Examiners of Electricians

Agency websiteLicense lookup

License classifications

The license types relevant to low-voltage work in Massachusetts.

  • SC - Systems Contractor (Class B)

    Low-voltage, fire alarm, sound, intercom, telephone, signaling, security. The standard license for low-voltage installers.

    Exam required

  • ST - Systems Technician

    Individual journeyman tier for Systems Contractor work. Required to work under an SC contractor.

    Exam required

  • A - Master Electrician / Class A

    Full electrical including low-voltage scope. Required for full electrical contracting.

    Exam required

State-wide requirements

Workers' compensation
Required
Renewal cycle
Every 3 years

Common pitfalls

Mistakes we see installers make when navigating Massachusetts licensing.

  • Massachusetts requires the Systems Contractor (SC) license for low-voltage; a Class A Master Electrician license does NOT automatically include SC scope. If you're doing both, you need both.
  • Triennial (3-year) renewal cycle with 21 hours of continuing education required. Missing the CE makes the renewal application invalid.
  • Boston, Cambridge, and Worcester each have their own permit and inspector relationship; state license alone doesn't authorize work without local permitting.

Sources

Last verified May 23, 2026. See something out of date? Email us.

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Disclaimer: This page summarizes public regulatory information for the convenience of low-voltage installers. It is not legal advice. State requirements change. Always verify current rules with the state agency before applying for, renewing, or relying on a license.