Electrical Inspector Licensing Exam
Practice Test – Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. What is the primary purpose of the National Electrical Code
(NEC)?
a) To increase construction costs
b) To ensure uniform wiring practices nationwide
c) To safeguard persons and property from electrical hazards
d) To regulate utility companies
Answer: c
The NEC’s main goal is to protect people and property from electrical
hazards.
2. What is the minimum burial depth for nonmetallic-sheathed cable
(Type NM) installed underground in conduit?
a) 6 inches
b) 12 inches
c) 18 inches
d) 24 inches
Answer: c
The NEC requires 18 inches of cover for NM cable in conduit
underground.
,3. What is the minimum working clearance in front of electrical
panels rated 600 volts or less?
a) 24 inches
b) 30 inches
c) 36 inches
d) 48 inches
Answer: c
The required minimum working space in front of such panels is 36
inches.
4. What color is typically used for grounding conductors?
a) White
b) Red
c) Green
d) Blue
Answer: c
Green or bare wires indicate grounding conductors.
5. What is the maximum number of 90-degree bends allowed in a
single conduit run between pull points?
a) 2
b) 3
c) 4
d) 5
Answer: c
The NEC allows a maximum of four 90-degree bends between pull
points.
6. Which type of conduit is most resistant to corrosion in damp
environments?
a) EMT
b) RMC
, c) PVC
d) FMC
Answer: c
PVC is nonmetallic and offers superior corrosion resistance.
7. In residential wiring, what is the standard voltage for general-
purpose circuits?
a) 120 volts
b) 208 volts
c) 240 volts
d) 277 volts
Answer: a
Typical household circuits operate at 120 volts.
8. A GFCI device is primarily designed to protect against:
a) Overcurrent
b) Ground faults
c) Short circuits
d) Lightning strikes
Answer: b
GFCIs detect current leakage to ground and prevent shock.
9. Which wire size is appropriate for a 20-amp circuit?
a) 14 AWG
b) 12 AWG
c) 10 AWG
d) 8 AWG
Answer: b
12 AWG copper conductors are rated for 20 amps.
10. What is the typical service voltage for a single-family
dwelling?
Practice Test – Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of the National Electrical Code
(NEC)?
a) To increase construction costs
b) To ensure uniform wiring practices nationwide
c) To safeguard persons and property from electrical hazards
d) To regulate utility companies
Answer: c
The NEC’s main goal is to protect people and property from electrical
hazards.
2. What is the minimum burial depth for nonmetallic-sheathed cable
(Type NM) installed underground in conduit?
a) 6 inches
b) 12 inches
c) 18 inches
d) 24 inches
Answer: c
The NEC requires 18 inches of cover for NM cable in conduit
underground.
,3. What is the minimum working clearance in front of electrical
panels rated 600 volts or less?
a) 24 inches
b) 30 inches
c) 36 inches
d) 48 inches
Answer: c
The required minimum working space in front of such panels is 36
inches.
4. What color is typically used for grounding conductors?
a) White
b) Red
c) Green
d) Blue
Answer: c
Green or bare wires indicate grounding conductors.
5. What is the maximum number of 90-degree bends allowed in a
single conduit run between pull points?
a) 2
b) 3
c) 4
d) 5
Answer: c
The NEC allows a maximum of four 90-degree bends between pull
points.
6. Which type of conduit is most resistant to corrosion in damp
environments?
a) EMT
b) RMC
, c) PVC
d) FMC
Answer: c
PVC is nonmetallic and offers superior corrosion resistance.
7. In residential wiring, what is the standard voltage for general-
purpose circuits?
a) 120 volts
b) 208 volts
c) 240 volts
d) 277 volts
Answer: a
Typical household circuits operate at 120 volts.
8. A GFCI device is primarily designed to protect against:
a) Overcurrent
b) Ground faults
c) Short circuits
d) Lightning strikes
Answer: b
GFCIs detect current leakage to ground and prevent shock.
9. Which wire size is appropriate for a 20-amp circuit?
a) 14 AWG
b) 12 AWG
c) 10 AWG
d) 8 AWG
Answer: b
12 AWG copper conductors are rated for 20 amps.
10. What is the typical service voltage for a single-family
dwelling?
