COLORADO ICC RESIDENTIAL ELECTRICAL
INSPECTOR EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary purpose of a grounding system in a
residential electrical installation?
A. Increase circuit voltage
B. Provide a return path for normal current
C. Protect against electrical shock by directing fault current
safely to earth
D. Reduce energy consumption
Rationale: Grounding ensures that fault currents have a safe
path to earth, reducing shock and fire hazards.
Correct Answer: C
2. Which code is most commonly used for residential electrical
installations in Colorado?
A. NFPA 70 (National Electrical Code)
B. International Fire Code (IFC)
C. Uniform Plumbing Code (UPC)
D. OSHA 1910
Rationale: Residential electrical work is governed primarily by
the NEC (NFPA 70).
Correct Answer: A
,3. What is the minimum number of 20-ampere branch circuits
required for kitchen countertop receptacles in a dwelling unit?
A. 1
B. 2
C. 3
D. 4
Rationale: NEC requires at least two 20-amp small appliance
branch circuits in kitchens.
Correct Answer: B
4. What is the maximum spacing allowed between receptacles
along kitchen countertops?
A. 4 feet
B. 6 feet
C. 8 feet
D. 12 feet
Rationale: Receptacles must be installed so that no point along
the wall line is more than 24 inches from an outlet.
Correct Answer: B
5. What device is required to protect bathroom receptacle
outlets in residential units?
,A. AFCI
B. GFCI
C. GFI breaker only
D. Surge protector
Rationale: Bathrooms require GFCI protection due to high
shock risk.
Correct Answer: B
6. What is the purpose of an Arc Fault Circuit Interrupter
(AFCI)?
A. Prevent overloads
B. Protect against arc-fault fire hazards
C. Increase voltage stability
D. Ground electrical systems
Rationale: AFCIs detect arcing conditions that could cause fires.
Correct Answer: B
7. What is the minimum working clearance in front of
electrical equipment rated 0–150 volts to ground?
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
, Rationale: NEC requires 3 feet minimum working clearance.
Correct Answer: B
8. Which conductor is typically considered the grounded
conductor?
A. Hot wire
B. Neutral wire
C. Equipment grounding conductor
D. Bonding jumper
Rationale: The neutral is the grounded current-carrying
conductor.
Correct Answer: B
9. What is the minimum burial depth for residential branch
circuit conductors in PVC conduit under a residential yard?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Rationale: NEC requires 18 inches for PVC-conduit-protected
circuits under residential areas.
Correct Answer: C
10. What is the primary function of a circuit breaker?
INSPECTOR EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary purpose of a grounding system in a
residential electrical installation?
A. Increase circuit voltage
B. Provide a return path for normal current
C. Protect against electrical shock by directing fault current
safely to earth
D. Reduce energy consumption
Rationale: Grounding ensures that fault currents have a safe
path to earth, reducing shock and fire hazards.
Correct Answer: C
2. Which code is most commonly used for residential electrical
installations in Colorado?
A. NFPA 70 (National Electrical Code)
B. International Fire Code (IFC)
C. Uniform Plumbing Code (UPC)
D. OSHA 1910
Rationale: Residential electrical work is governed primarily by
the NEC (NFPA 70).
Correct Answer: A
,3. What is the minimum number of 20-ampere branch circuits
required for kitchen countertop receptacles in a dwelling unit?
A. 1
B. 2
C. 3
D. 4
Rationale: NEC requires at least two 20-amp small appliance
branch circuits in kitchens.
Correct Answer: B
4. What is the maximum spacing allowed between receptacles
along kitchen countertops?
A. 4 feet
B. 6 feet
C. 8 feet
D. 12 feet
Rationale: Receptacles must be installed so that no point along
the wall line is more than 24 inches from an outlet.
Correct Answer: B
5. What device is required to protect bathroom receptacle
outlets in residential units?
,A. AFCI
B. GFCI
C. GFI breaker only
D. Surge protector
Rationale: Bathrooms require GFCI protection due to high
shock risk.
Correct Answer: B
6. What is the purpose of an Arc Fault Circuit Interrupter
(AFCI)?
A. Prevent overloads
B. Protect against arc-fault fire hazards
C. Increase voltage stability
D. Ground electrical systems
Rationale: AFCIs detect arcing conditions that could cause fires.
Correct Answer: B
7. What is the minimum working clearance in front of
electrical equipment rated 0–150 volts to ground?
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
, Rationale: NEC requires 3 feet minimum working clearance.
Correct Answer: B
8. Which conductor is typically considered the grounded
conductor?
A. Hot wire
B. Neutral wire
C. Equipment grounding conductor
D. Bonding jumper
Rationale: The neutral is the grounded current-carrying
conductor.
Correct Answer: B
9. What is the minimum burial depth for residential branch
circuit conductors in PVC conduit under a residential yard?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Rationale: NEC requires 18 inches for PVC-conduit-protected
circuits under residential areas.
Correct Answer: C
10. What is the primary function of a circuit breaker?
