Texas Electrical Inspector Exam With
Actual Questions & Verified Answers,
Plus Explained Rationales/Expert
Verified For Guaranteed 100% Pass
2026/Latest Update/Instant Download
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1. What is the primary purpose of the National Electrical Code
(NEC)?
A) To regulate utility companies
B) To standardize building materials
C) To ensure safe electrical installations
D) To set energy efficiency standards
Rationale: The NEC provides standards to protect people and
property from electrical hazards.
2. What is the minimum working space in front of electrical
equipment rated 600V or less?
A) 24 inches
B) 30 inches
C) 36 inches
D) 48 inches
Rationale: NEC 110.26(A) requires a minimum of 36 inches in
front of electrical equipment to allow safe access.
,3. Which type of conduit is permitted to be buried directly in the
earth?
A) EMT
B) RMC
C) FMC
D) ENT
Rationale: Rigid Metal Conduit (RMC) is designed for direct
burial without additional protection.
4. What is the maximum number of outlets allowed on a 20-amp
branch circuit in a dwelling?
A) 8
B) 10
C) 12
D) 15
Rationale: NEC provides guidelines for load calculations;
typically, 12 outlets is acceptable on a 20-amp general-purpose
circuit.
5. What color is typically used for the equipment grounding
conductor?
A) Red
B) Blue
C) Green or bare copper
D) White
Rationale: NEC 250.119 requires the grounding conductor to be
green or bare.
6. What is the minimum height for a service disconnect in a
residential dwelling?
A) 5 feet
B) 6 feet
, C) 7 feet
D) 6 feet 7 inches
Rationale: NEC 230.70(A)(1) specifies that service disconnects
must be installed at a maximum height of 6 feet 7 inches.
7. Which of the following devices provides protection against
overcurrent?
A) GFCI
B) AFCI
C) Circuit breaker
D) Switch
Rationale: Circuit breakers and fuses are overcurrent protection
devices; GFCIs protect against ground faults, not overcurrent.
8. In a three-phase system, what is the phase-to-phase voltage if the
phase-to-neutral voltage is 120V?
A) 120V
B) 208V
C) 208V
D) 240V
Rationale: In a 120/208V three-phase system, the line-to-line
voltage is 208V (√3 × 120V).
9. What is the maximum allowable voltage drop for feeder circuits to
ensure efficiency?
A) 1%
B) 2%
C) 3%
D) 5%
Rationale: NEC recommends a maximum 3% voltage drop for
feeders to maintain proper operation and efficiency.
Actual Questions & Verified Answers,
Plus Explained Rationales/Expert
Verified For Guaranteed 100% Pass
2026/Latest Update/Instant Download
1. What is the primary purpose of the National Electrical Code
(NEC)?
A) To regulate utility companies
B) To standardize building materials
C) To ensure safe electrical installations
D) To set energy efficiency standards
Rationale: The NEC provides standards to protect people and
property from electrical hazards.
2. What is the minimum working space in front of electrical
equipment rated 600V or less?
A) 24 inches
B) 30 inches
C) 36 inches
D) 48 inches
Rationale: NEC 110.26(A) requires a minimum of 36 inches in
front of electrical equipment to allow safe access.
,3. Which type of conduit is permitted to be buried directly in the
earth?
A) EMT
B) RMC
C) FMC
D) ENT
Rationale: Rigid Metal Conduit (RMC) is designed for direct
burial without additional protection.
4. What is the maximum number of outlets allowed on a 20-amp
branch circuit in a dwelling?
A) 8
B) 10
C) 12
D) 15
Rationale: NEC provides guidelines for load calculations;
typically, 12 outlets is acceptable on a 20-amp general-purpose
circuit.
5. What color is typically used for the equipment grounding
conductor?
A) Red
B) Blue
C) Green or bare copper
D) White
Rationale: NEC 250.119 requires the grounding conductor to be
green or bare.
6. What is the minimum height for a service disconnect in a
residential dwelling?
A) 5 feet
B) 6 feet
, C) 7 feet
D) 6 feet 7 inches
Rationale: NEC 230.70(A)(1) specifies that service disconnects
must be installed at a maximum height of 6 feet 7 inches.
7. Which of the following devices provides protection against
overcurrent?
A) GFCI
B) AFCI
C) Circuit breaker
D) Switch
Rationale: Circuit breakers and fuses are overcurrent protection
devices; GFCIs protect against ground faults, not overcurrent.
8. In a three-phase system, what is the phase-to-phase voltage if the
phase-to-neutral voltage is 120V?
A) 120V
B) 208V
C) 208V
D) 240V
Rationale: In a 120/208V three-phase system, the line-to-line
voltage is 208V (√3 × 120V).
9. What is the maximum allowable voltage drop for feeder circuits to
ensure efficiency?
A) 1%
B) 2%
C) 3%
D) 5%
Rationale: NEC recommends a maximum 3% voltage drop for
feeders to maintain proper operation and efficiency.
