100+ Free SC Low Voltage Practice Questions

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Free Low Voltage Contractor Practice Test by State 2026: 2,800+ Questions25 min read

2026 Statistics

Key Facts: SC Low Voltage Exam

70%

Passing Score

SC Boards

2020 NEC

Code Edition

SC State

SLED

Burglar Alarm Oversight

SC LLR

100 Q

Practice Questions

OpenExamPrep

South Carolina uses multiple boards: LLR/SLED for burglar alarm, Contractors' Licensing Board for fire alarm and specialty work, each with separate requirements.

Sample SC Low Voltage Practice Questions

Try these sample questions to test your SC Low Voltage exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In South Carolina, which agencies regulate low voltage contractor licensing for alarm and specialty work?

A.Only the SC Department of Labor

B.Multiple boards including SC LLR and SLED for burglar alarm, and the Contractors' Licensing Board for specialty work

C.SC Department of Education

D.SC Department of Revenue

Explanation: South Carolina uses multiple regulatory bodies: the Department of Labor, Licensing and Regulation (LLR) and SLED oversee burglar alarm licensing, while the Contractors' Licensing Board handles specialty contractor classifications including fire alarm work.

2What license is required to install burglar alarm systems in South Carolina?

A.General Electrical license only

B.Burglar Alarm Contractor license through LLR/SLED

C.No license required

D.Fire alarm license only

Explanation: South Carolina requires a Burglar Alarm Contractor license regulated through the Department of Labor, Licensing and Regulation with SLED oversight for individuals and companies installing burglar alarm systems.

3What license covers fire alarm installation in South Carolina?

A.Burglar Alarm Contractor only

B.Fire Alarm Contractor or appropriate Specialty Contractor license

C.No license required

D.General Business license

Explanation: Fire alarm installation in South Carolina requires a Fire Alarm Contractor license or appropriate Specialty Contractor license through the SC Contractors' Licensing Board, separate from the burglar alarm license.

4Under NEC Article 725, what are the three circuit classes?

A.A, B, C

B.1, 2, 3

C.I, II, III

D.X, Y, Z

Explanation: NEC 725 defines Class 1, 2, and 3 circuits with different voltage/power limits determining wiring methods and requirements.

5What NEC edition does South Carolina currently follow?

A.2017

B.2020

C.2023

D.2026

Explanation: South Carolina follows the 2020 NEC for electrical installations including low voltage work.

6In South Carolina, SLED requires what for burglar alarm business licensing?

A.Only a business license

B.Background check, application, and proof of qualifications

C.No requirements

D.Only insurance

Explanation: The South Carolina Law Enforcement Division (SLED) requires background checks, a completed application, and proof of qualifications for burglar alarm business licensing to ensure public safety.

7NEC Article 760 covers what?

A.Emergency systems

B.Signaling

C.Fire alarm systems

D.Communications

Explanation: NEC 760 covers fire alarm system installation including PLFA and NPLFA circuits, cables, and separation.

8Plenum fire alarm cable type?

A.FPL

B.FPLR

C.FPLP

D.CM

Explanation: FPLP cable meets plenum space fire/smoke requirements per NEC 760.

9NFPA 72 battery standby?

A.12h+5min

B.24h+5min

C.24h+15min

D.48h+10min

Explanation: 24 hours standby plus 5 minutes alarm for secondary power.

10TIA-568 max horizontal cable?

A.50m

B.90m

C.100m

D.150m

Explanation: 90m permanent link; 100m total channel.

About the SC Low Voltage Exam

The South Carolina low voltage contractor exam covers burglar alarm, fire alarm, and specialty contractor licensing. Topics include NEC codes, NFPA 72, security systems, structured cabling, and SC state regulations.

Questions

100 scored questions

Time Limit

2 hours

Passing Score

70%

Exam Fee

Varies (SC LLR / SLED / Contractors' Licensing Board)

SC Low Voltage Exam Content Outline

20%

SC State Regulations

LLR/SLED burglar alarm, Contractors' Board specialty, permits, bonding, insurance

25%

NEC Codes & Standards

NEC Articles 725, 760, 770, 800, circuit classifications, cable types

20%

Systems & Technology

Fire alarm, security, access control, structured cabling, IP systems

20%

Installation Practices

Wiring methods, terminations, firestopping, cable management

15%

Safety & Testing

OSHA safety, cable certification, NFPA 72 testing, surge protection

How to Pass the SC Low Voltage Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: 2 hours
Exam fee: Varies

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

SC Low Voltage Study Tips from Top Performers

1Understand SC's multi-board licensing: LLR/SLED for burglar alarm vs Contractors' Board for fire alarm/specialty

2Know that burglar alarm and fire alarm are NOT interchangeable licenses in SC

3Master NEC Articles 725, 760, 770, and 800 for circuit and cable requirements

4Study NFPA 72 testing frequencies, temporal pattern, and battery calculations

5Review SC bonding, insurance, and permit requirements for low voltage work

Frequently Asked Questions

What SC licenses are needed for low voltage work?

SC has separate licensing: burglar alarm through LLR/SLED, and fire alarm/specialty work through the Contractors' Licensing Board. Each has its own requirements.

Can a burglar alarm license holder install fire alarms?

No, these are separate licenses. Fire alarm installation requires its own contractor license through the SC Contractors' Licensing Board.

What does SLED require for burglar alarm licensing?

SLED requires a background check, completed application, proof of qualifications, and ongoing compliance for burglar alarm business licensing.

What bonding is required?

The SC Contractors' Licensing Board requires a surety bond for specialty contractor licenses as consumer protection.