Louisiana Electrical Contractor
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. Which edition of the National Electrical Code is the primary
technical reference for most electrical installations, subject to
Louisiana adoption and applicable amendments?
A. International Plumbing Code
B. National Electrical Code
C. International Mechanical Code
D. Uniform Fire Code
Answer: B. National Electrical Code
Rationale: The National Electrical Code (NEC) provides the principal
technical requirements governing electrical installations, including
wiring methods, equipment, overcurrent protection, grounding, and
special installations.
2. What is the primary purpose of an electrical contractor license?
A. To eliminate the need for permits
B. To authorize qualified persons to perform electrical contracting within
the applicable jurisdiction
C. To replace electrical inspections
D. To permit unqualified workers to supervise electrical work
,Answer: B. To authorize qualified persons to perform electrical
contracting within the applicable jurisdiction
Rationale: Licensing establishes legal authority and competency
requirements for contractors performing regulated electrical work.
Licensing does not eliminate permitting, inspection, or code-
compliance requirements.
3. Which NEC article contains general requirements for conductors?
A. Article 110
B. Article 200
C. Article 300
D. Article 310
Answer: D. Article 310
Rationale: NEC Article 310 addresses conductors for general wiring,
including conductor requirements, ampacity, identification, and
installation provisions.
4. What is the purpose of overcurrent protection?
A. Increase conductor resistance
B. Protect conductors and equipment from excessive current
C. Increase circuit voltage
D. Eliminate grounding requirements
Answer: B. Protect conductors and equipment from excessive
current
Rationale: Overcurrent protective devices limit the effects of excessive
current caused by overloads, short circuits, and ground faults, helping
prevent conductor damage and fire hazards.
, 5. Which device is commonly used to protect a branch circuit against
overcurrent?
A. Transformer
B. Circuit breaker
C. Junction box
D. Receptacle cover
Answer: B. Circuit breaker
Rationale: A circuit breaker opens a circuit when current exceeds its
permitted rating or when another applicable trip condition occurs,
protecting the circuit conductors.
6. What is the purpose of a disconnecting means?
A. To increase available fault current
B. To provide a means of disconnecting equipment from its source of
supply
C. To replace the grounding electrode system
D. To reduce conductor ampacity
Answer: B. To provide a means of disconnecting equipment from its
source of supply
Rationale: Disconnecting means allow electrical equipment or circuits
to be isolated from their source for operation, maintenance, servicing,
and safety.
7. Which NEC article addresses branch circuits?
A. Article 100
B. Article 210
C. Article 250
D. Article 430
, Answer: B. Article 210
Rationale: NEC Article 210 contains requirements for branch circuits,
including ratings, receptacle outlets, multiwire branch circuits, and
branch-circuit protection.
8. Which NEC article primarily covers grounding and bonding?
A. Article 225
B. Article 240
C. Article 250
D. Article 300
Answer: C. Article 250
Rationale: Article 250 establishes requirements for grounding and
bonding electrical systems and equipment, including grounding
electrodes, grounding electrode conductors, equipment grounding
conductors, and bonding.
9. What is the primary function of an equipment grounding
conductor?
A. Carry normal load current
B. Provide a low-impedance path for fault current
C. Increase system voltage
D. Replace the grounded conductor
Answer: B. Provide a low-impedance path for fault current
Rationale: The equipment grounding conductor provides a conductive
path for fault current so the overcurrent protective device can operate
promptly and clear the fault.
10. What color is generally used to identify an insulated
grounded conductor in a typical AC circuit?
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. Which edition of the National Electrical Code is the primary
technical reference for most electrical installations, subject to
Louisiana adoption and applicable amendments?
A. International Plumbing Code
B. National Electrical Code
C. International Mechanical Code
D. Uniform Fire Code
Answer: B. National Electrical Code
Rationale: The National Electrical Code (NEC) provides the principal
technical requirements governing electrical installations, including
wiring methods, equipment, overcurrent protection, grounding, and
special installations.
2. What is the primary purpose of an electrical contractor license?
A. To eliminate the need for permits
B. To authorize qualified persons to perform electrical contracting within
the applicable jurisdiction
C. To replace electrical inspections
D. To permit unqualified workers to supervise electrical work
,Answer: B. To authorize qualified persons to perform electrical
contracting within the applicable jurisdiction
Rationale: Licensing establishes legal authority and competency
requirements for contractors performing regulated electrical work.
Licensing does not eliminate permitting, inspection, or code-
compliance requirements.
3. Which NEC article contains general requirements for conductors?
A. Article 110
B. Article 200
C. Article 300
D. Article 310
Answer: D. Article 310
Rationale: NEC Article 310 addresses conductors for general wiring,
including conductor requirements, ampacity, identification, and
installation provisions.
4. What is the purpose of overcurrent protection?
A. Increase conductor resistance
B. Protect conductors and equipment from excessive current
C. Increase circuit voltage
D. Eliminate grounding requirements
Answer: B. Protect conductors and equipment from excessive
current
Rationale: Overcurrent protective devices limit the effects of excessive
current caused by overloads, short circuits, and ground faults, helping
prevent conductor damage and fire hazards.
, 5. Which device is commonly used to protect a branch circuit against
overcurrent?
A. Transformer
B. Circuit breaker
C. Junction box
D. Receptacle cover
Answer: B. Circuit breaker
Rationale: A circuit breaker opens a circuit when current exceeds its
permitted rating or when another applicable trip condition occurs,
protecting the circuit conductors.
6. What is the purpose of a disconnecting means?
A. To increase available fault current
B. To provide a means of disconnecting equipment from its source of
supply
C. To replace the grounding electrode system
D. To reduce conductor ampacity
Answer: B. To provide a means of disconnecting equipment from its
source of supply
Rationale: Disconnecting means allow electrical equipment or circuits
to be isolated from their source for operation, maintenance, servicing,
and safety.
7. Which NEC article addresses branch circuits?
A. Article 100
B. Article 210
C. Article 250
D. Article 430
, Answer: B. Article 210
Rationale: NEC Article 210 contains requirements for branch circuits,
including ratings, receptacle outlets, multiwire branch circuits, and
branch-circuit protection.
8. Which NEC article primarily covers grounding and bonding?
A. Article 225
B. Article 240
C. Article 250
D. Article 300
Answer: C. Article 250
Rationale: Article 250 establishes requirements for grounding and
bonding electrical systems and equipment, including grounding
electrodes, grounding electrode conductors, equipment grounding
conductors, and bonding.
9. What is the primary function of an equipment grounding
conductor?
A. Carry normal load current
B. Provide a low-impedance path for fault current
C. Increase system voltage
D. Replace the grounded conductor
Answer: B. Provide a low-impedance path for fault current
Rationale: The equipment grounding conductor provides a conductive
path for fault current so the overcurrent protective device can operate
promptly and clear the fault.
10. What color is generally used to identify an insulated
grounded conductor in a typical AC circuit?
