⚠️ VARIES BY VOLTAGE AND PROJECT VALUE: South Carolina exempts work at or below 50 volts, but requires licensing for higher voltage work and projects exceeding specific dollar thresholds.

Work at or Below 50 Volts:

Generally EXEMPT from electrical contractor licensing requirements

Work Above 50 Volts:

Requires licensed electrical contractor

Licensing Triggers:

• Commercial Projects: License required if over $5,000
• Residential Projects: License required if over $200
• Mechanical/Electrical: Projects over $10,000 require mechanical contractor license

Available Licenses:

• Mechanical Contractor: With electrical subclassification
• Residential Builder: With electrical specialty registration
• General Contractor: For projects exceeding thresholds

Low Voltage Systems (≤50V):

• Doorbell systems
• Thermostat wiring
• Some LED landscape lighting
• Class 2 circuits
• Low voltage control systems

Systems Often Above 50V (License Required):

• Most fire alarm systems
• Commercial security systems
• Structured cabling (Power over Ethernet)
• Access control systems with electric locks

• Even if voltage is ≤50V, project value thresholds may still require licensing
• Municipal requirements may be more restrictive
• Always verify specific system voltage before determining requirements
• Fire alarm and security system work may have additional requirements

South Carolina Contractors' Licensing Board
110 Centerview Drive
Columbia, SC 29210
Phone: (803) 896-4686
Email: Contact.CLB@llr.sc.gov
Website: llr.sc.gov/clb

Disclaimer: This information is provided for general guidance only and should not be considered legal advice. Requirements may vary by jurisdiction and project specifics. Always consult with the South Carolina Contractors' Licensing Board and local authorities for current requirements. Last updated: January 2025.