Low Voltage License Wisconsin
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Complete guide to Wisconsin low voltage licensing requirements and DSPS regulations
Wisconsin Low Voltage Contractor License Requirements
🟢 WORK ≤50V GENERALLY EXEMPT: Wisconsin exempts work at 50 volts or less from electrical contractor licensing, though registration and local requirements may apply.
Current Requirements (2024-2025)
Voltage-Based Exemption
Wisconsin provides an exemption for work at 50 volts or less from state electrical contractor licensing requirements. However, electrical contractor registration is required for work above this threshold.
Key Thresholds:
- ≤50 Volts: Generally exempt from state electrical licensing
- >50 Volts: Electrical contractor registration required
- Experience for Registration: 4 years electrical experience
- Examination: Required for registration
- Statewide Coverage: Registration valid throughout Wisconsin
Systems Typically ≤50V (Exempt)
Common Exempt Systems:
- Doorbell systems
- Thermostat wiring (24V)
- Some landscape lighting
- Low voltage control circuits
- Class 2 circuits under 50V
- Some intercom systems
Systems Often >50V (Registration Required):
- Most fire alarm systems
- Commercial security systems
- Power over Ethernet (PoE) systems
- Many access control systems
- Commercial audio/video systems
Important Considerations
- Local municipalities may have additional requirements
- Building permits may still be required
- Business registration may be needed separately
- Always verify actual system voltage before determining requirements
Legal Authority
- Wisconsin Statutes Chapter 101 - Regulation of Industry, Buildings and Safety
- Wisconsin Administrative Code SPS 305-308 - Electrical Code
- Department of Safety & Professional Services - Regulatory authority
Contact Information
Wisconsin Department of Safety & Professional Services
4822 Madison Yards Way
Madison, WI 53705
Phone: (608) 266-2112
Website: dsps.wi.gov
Disclaimer: This information is provided for general guidance only and should not be considered legal advice. Requirements may change and local jurisdictions may have additional requirements. Always consult with the Wisconsin Department of Safety & Professional Services and local authorities. Last updated: January 2025.
Last updated: January 2025