Intercom System Permit Requirements in New Mexico

New Mexico regulates low voltage work through the ES-3 Low Voltage Special Systems License administered by the Construction Industries Division. Here's what contractors need to know about licensing, permits, and requirements for intercom systems in the Land of Enchantment.

State Licensing Requirements

The New Mexico Construction Industries Division (CID) regulates all electrical and low voltage work through specific license classifications:

ES-3 Low Voltage Special Systems License

This license covers interior and exterior special systems operating at 50 volts or less:

• Telecommunications systems
• Intercom and door entry systems
• Fire alarm systems
• CATV systems
• Audio and visual systems
• Security systems
• Door and gate operated control circuits
• Temperature control circuits
• Other low voltage specialty systems

Experience Requirements

• 2 years of foreman-level practical or related trade experience required
• Technical training from accredited institutions may substitute for work experience
• Each year of training equals one-half year of experience
• Training cannot exceed one-half of total experience requirement

Examination Requirements

Two exams must be passed, both administered by PSI:

Exam	Passing Score	Format
ES-3 Low Voltage Exam	75%	Open book
Business and Law Exam	75%	Open book

ES-3 Exam Content

The trade exam covers:

• Grounding and Bonding
• Conductors
• Electrical Power Conditioning
• General Low Voltage
• Sound and Video Systems
• Intrusion Detection and Alarms
• Fire Detection and Alarms
• Computer and Data Systems
• CCTV Systems
• Testing Equipment
• CATV and MATV Systems

ES-3J Journeyman Classification

The ES-3J is the journeyman classification for sound, intercommunication, electrical alarm systems, and systems 50 volts and under.

Additional Requirements

Business Registration

• Registration with NM Taxation and Revenue Department
• Registration with NM Public Regulation Commission (for corporations/LLCs)
• License bond, cash collateral, or current financial statement
• Application and licensing fees

Continuing Education

New Mexico does not require continuing education for the ES-3 license.

Major Cities in New Mexico

Albuquerque

Albuquerque requires permits for commercial low voltage work through the Planning Department. Licensed ES-3 contractors must pull permits for covered installations. The city follows state licensing requirements.

Las Cruces

Las Cruces requires permits for commercial electrical work through the Building Safety Division. ES-3 licensed contractors handle low voltage projects.

Santa Fe

Santa Fe follows state requirements. Commercial projects require permits through the Building and Fire Department.

Rio Rancho

Rio Rancho requires permits for commercial construction through the Development Services Department.

When Permits ARE Required

Scenario	Permit Required?	Notes
Residential video doorbell	Usually No	Minimal installation
Residential intercom	Check Locally	ES-3 license required commercially
Commercial intercom	Yes	Permit and ES-3 license required
New construction	Yes	Part of building permit

Commercial vs Residential

Residential Intercom

• ES-3 license required for contractor work
• Permits may be required locally
• Homeowner exemption for own residence
• Must comply with NEC Article 725

Commercial Intercom

• ES-3 license mandatory
• Permits required through local jurisdiction
• Plans may be required for larger projects
• Inspection before activation

Installation Best Practices

1. Maintain ES-3 license: Keep current with CID
2. Pull permits: Obtain required permits
3. Follow codes: Comply with NEC Article 725
4. Document work: Keep records for inspections
5. Meet business requirements: Maintain proper registrations

Related Permits You May Need

• Access Control Permits in New Mexico
• Security Camera Permits in New Mexico
• Fire Alarm Permits in New Mexico

Frequently Asked Questions

Do I need a license to install intercoms in New Mexico?

Yes, you need an ES-3 Low Voltage Special Systems License from the Construction Industries Division.

How long does it take to get an ES-3 license?

You need 2 years of foreman-level experience, then pass two exams with 75% scores.

Can a homeowner install their own intercom?

Yes, homeowners can install systems in their own residence without licensing.

Is the ES-3 exam difficult?

It's an open-book exam covering various low voltage topics. Study materials and prep courses are available.

Find Intercom Projects in New Mexico

Looking for intercom installation opportunities in New Mexico? LVN Signal tracks construction permits and bids across New Mexico, alerting you to projects the moment they're filed.

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Last updated: February 2026. Contact the New Mexico Construction Industries Division for current requirements.