The Ultimate California C-7 Low
Voltage Systems Contractor License
Exam Prep Guide: Practice Questions
with Verified Answers and Detailed
Rationales for 2026
SECTION 1: LICENSE SCOPE AND CLASSIFICATION
Q1. According to California Code of Regulations Title 16, Section
832.07, what is the maximum voltage for systems covered by a C-7
Low Voltage Systems Contractor license?
A) 50 volts
B) 91 volts
C) 120 volts
D) 240 volts
Answer: B) 91 volts
Rationale: The C-7 license covers systems that are energy-limited and do
not exceed 91 volts. This is a fundamental scope definition that every
candidate must know. Systems exceeding this threshold require a C-10
Electrical Contractor license .
Q2. Which of the following systems is specifically EXCLUDED from the
C-7 license scope?
,A) Telephone systems
B) Closed-circuit video systems
C) Fire alarm systems
D) Sound systems
Answer: C) Fire alarm systems
Rationale: Fire alarm systems are explicitly excluded from the C-7
classification. While some low-voltage fire alarm work may be performed,
the regulation states that fire alarm systems are not included in the C-7
scope .
Q3. Which agency has primary enforcement authority over low-
voltage installations in California?
A) Federal Communications Commission (FCC)
B) California Public Utilities Commission (CPUC)
C) Local Authority Having Jurisdiction (AHJ)
D) National Fire Protection Association (NFPA)
Answer: C) Local Authority Having Jurisdiction (AHJ)
Rationale: While multiple agencies set standards, the local AHJ (building
department, fire marshal) has enforcement authority over installations. They
interpret and enforce codes at the local level .
Q4. The California Electrical Code (CEC) is based on which national
standard?
A) International Building Code (IBC)
B) National Electrical Code (NEC)
C) NFPA 101 Life Safety Code
D) IEEE 802.3
,Answer: B) National Electrical Code (NEC)
Rationale: The CEC adopts NEC provisions for low-voltage systems and
serves as the primary reference for electrical installations in California, with
California-specific amendments. It is Title 24 of the California Code of
Regulations .
Q5. Which document takes precedence when there is a conflict
between codes?
A) National Electrical Code (NEC)
B) California Electrical Code (CEC)
C) Local ordinances
D) Manufacturer's specifications
Answer: C) Local ordinances
Rationale: Local amendments and ordinances typically take precedence
over state and national codes. The local Authority Having Jurisdiction (AHJ)
enforces the applicable codes .
Q6. Can a C-7 contractor install solar equipment?
A) Yes, if it is low voltage
B) No, solar equipment is specifically excluded
C) Yes, with a separate endorsement
D) Only if the voltage is below 50 volts
Answer: B) No, solar equipment is specifically excluded
Rationale: The C-7 scope explicitly excludes solar equipment from the work
a C-7 contractor may perform. Solar installations generally require a C-10
license or a specialty solar classification .
, Q7. Can a C-10 Electrical Contractor perform low-voltage
communications work?
A) No, only C-7 contractors can perform any low-voltage work
B) Yes, C-10 contractors can perform work within the scope of their license
C) Only if they also hold a C-7 license
D) No, this requires a separate communications endorsement
Answer: B) Yes, C-10 contractors can perform work within the scope of
their license
Rationale: The Business and Professions Code allows C-10 contractors to
act within the scope of their license for low-voltage communications work.
A C-10 license covers electrical work generally, which includes some low-
voltage work .
Q8. What is the legal authority for the C-7 classification?
A) California Business and Professions Code Section 7000
B) California Code of Regulations Title 16, Division 8, Article 3
C) National Electrical Code Article 725
D) California Labor Code Section 3700
Answer: B) California Code of Regulations Title 16, Division 8, Article 3
Rationale: The C-7 classification is established under CCR Title 16, Division
8, Article 3, with authority cited under Business and Professions Code
Sections 7008 and 7059 .
Q9. What types of systems are included in the C-7 license scope?
A) Telephone systems, sound systems, cable television systems
B) Closed-circuit video systems, satellite dish antennas
Voltage Systems Contractor License
Exam Prep Guide: Practice Questions
with Verified Answers and Detailed
Rationales for 2026
SECTION 1: LICENSE SCOPE AND CLASSIFICATION
Q1. According to California Code of Regulations Title 16, Section
832.07, what is the maximum voltage for systems covered by a C-7
Low Voltage Systems Contractor license?
A) 50 volts
B) 91 volts
C) 120 volts
D) 240 volts
Answer: B) 91 volts
Rationale: The C-7 license covers systems that are energy-limited and do
not exceed 91 volts. This is a fundamental scope definition that every
candidate must know. Systems exceeding this threshold require a C-10
Electrical Contractor license .
Q2. Which of the following systems is specifically EXCLUDED from the
C-7 license scope?
,A) Telephone systems
B) Closed-circuit video systems
C) Fire alarm systems
D) Sound systems
Answer: C) Fire alarm systems
Rationale: Fire alarm systems are explicitly excluded from the C-7
classification. While some low-voltage fire alarm work may be performed,
the regulation states that fire alarm systems are not included in the C-7
scope .
Q3. Which agency has primary enforcement authority over low-
voltage installations in California?
A) Federal Communications Commission (FCC)
B) California Public Utilities Commission (CPUC)
C) Local Authority Having Jurisdiction (AHJ)
D) National Fire Protection Association (NFPA)
Answer: C) Local Authority Having Jurisdiction (AHJ)
Rationale: While multiple agencies set standards, the local AHJ (building
department, fire marshal) has enforcement authority over installations. They
interpret and enforce codes at the local level .
Q4. The California Electrical Code (CEC) is based on which national
standard?
A) International Building Code (IBC)
B) National Electrical Code (NEC)
C) NFPA 101 Life Safety Code
D) IEEE 802.3
,Answer: B) National Electrical Code (NEC)
Rationale: The CEC adopts NEC provisions for low-voltage systems and
serves as the primary reference for electrical installations in California, with
California-specific amendments. It is Title 24 of the California Code of
Regulations .
Q5. Which document takes precedence when there is a conflict
between codes?
A) National Electrical Code (NEC)
B) California Electrical Code (CEC)
C) Local ordinances
D) Manufacturer's specifications
Answer: C) Local ordinances
Rationale: Local amendments and ordinances typically take precedence
over state and national codes. The local Authority Having Jurisdiction (AHJ)
enforces the applicable codes .
Q6. Can a C-7 contractor install solar equipment?
A) Yes, if it is low voltage
B) No, solar equipment is specifically excluded
C) Yes, with a separate endorsement
D) Only if the voltage is below 50 volts
Answer: B) No, solar equipment is specifically excluded
Rationale: The C-7 scope explicitly excludes solar equipment from the work
a C-7 contractor may perform. Solar installations generally require a C-10
license or a specialty solar classification .
, Q7. Can a C-10 Electrical Contractor perform low-voltage
communications work?
A) No, only C-7 contractors can perform any low-voltage work
B) Yes, C-10 contractors can perform work within the scope of their license
C) Only if they also hold a C-7 license
D) No, this requires a separate communications endorsement
Answer: B) Yes, C-10 contractors can perform work within the scope of
their license
Rationale: The Business and Professions Code allows C-10 contractors to
act within the scope of their license for low-voltage communications work.
A C-10 license covers electrical work generally, which includes some low-
voltage work .
Q8. What is the legal authority for the C-7 classification?
A) California Business and Professions Code Section 7000
B) California Code of Regulations Title 16, Division 8, Article 3
C) National Electrical Code Article 725
D) California Labor Code Section 3700
Answer: B) California Code of Regulations Title 16, Division 8, Article 3
Rationale: The C-7 classification is established under CCR Title 16, Division
8, Article 3, with authority cited under Business and Professions Code
Sections 7008 and 7059 .
Q9. What types of systems are included in the C-7 license scope?
A) Telephone systems, sound systems, cable television systems
B) Closed-circuit video systems, satellite dish antennas
