ICC E2 Commercial Electrical Inspector Exam
2026 | Latest Real Exam Questions & Answers
(Verified)
1. What is the minimum working space depth in front of electrical equipment operating at
150V to ground?
A. 2 ft
B. 3 ft
C. 3.5 ft
D. 4 ft
The NEC requires a minimum of 3 feet of working clearance for systems up to 150V to
ground.
2. Which NEC article covers grounding and bonding requirements?
A. 110
B. 210
C. 250
D. 300
Article 250 specifically addresses grounding and bonding.
3. What is the maximum overcurrent protection allowed for 12 AWG copper conductors?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
12 AWG copper conductors are typically rated for 20 amps under standard conditions.
4. What type of conduit is permitted for direct burial without additional protection?
A. EMT
B. FMC
C. PVC Schedule 40
D. RMC
PVC Schedule 40 is commonly approved for direct burial.
5. What is required when conductors are installed in parallel?
A. Different lengths allowed
B. Mixed conductor sizes allowed
C. Same length, size, and material required
D. Only same insulation required
Parallel conductors must be identical to ensure equal load distribution.
6. What is the minimum burial depth for rigid metal conduit under a driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Rigid metal conduit typically requires 18 inches burial depth under driveways.
7. What device protects against ground-fault current in personnel protection?
A. AFCI
, B. Breaker
C. GFCI
D. Fuse
GFCIs protect people from ground-fault hazards.
8. What is the maximum number of disconnects allowed for a service?
A. 4
B. 5
C. 6
D. 8
NEC allows up to six service disconnects.
9. What is required for equipment grounding conductors?
A. Must be insulated always
B. Must be aluminum
C. Must provide a low-impedance path to ground
D. Must be larger than phase conductors
They ensure fault current returns safely to clear faults.
10. What is the minimum size copper grounding electrode conductor for a 200A service?
A. #8 AWG
B. #6 AWG
C. #4 AWG
D. #2 AWG
#4 copper is typically required for a 200A service.
11. What NEC article covers branch circuits?
A. 110
B. 210
C. 220
D. 230
Article 210 governs branch circuits.
12. What is the purpose of bonding?
A. Increase voltage
B. Reduce current
C. Ensure electrical continuity
D. Prevent overload
Bonding connects conductive parts to maintain electrical continuity.
13. What is the standard voltage for commercial lighting circuits?
A. 120V
B. 277V
C. 240V
D. 480V
277V is commonly used in commercial lighting systems.
14. What is required for wet location boxes?
A. Painted coating
B. Weatherproof enclosure
C. Plastic only
D. Open back
Wet locations require weatherproof enclosures.
, 15. What is the maximum fill for conduit?
A. 25%
B. 31%
C. 40%
D. 50%
Maximum conduit fill is generally 40%.
16. What is the minimum size conductor for general lighting circuits?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
Commercial lighting circuits typically require 12 AWG.
17. What type of breaker protects against arc faults?
A. GFCI
B. Fuse
C. AFCI
D. Disconnect
AFCIs detect dangerous arc faults.
18. What must be grounded in a system?
A. Only neutral
B. Only equipment
C. System and equipment
D. None
Both system grounding and equipment grounding are required.
19. What is the minimum headroom for working space?
A. 5 ft
B. 6.5 ft
C. 7 ft
D. 8 ft
NEC requires at least 6.5 feet of headroom.
20. What is required for panelboards in damp locations?
A. Painted steel
B. Enclosure rated for damp locations
C. Ventilation holes
D. Wood backing
Proper enclosure rating is necessary for safety.
21. What is the purpose of a disconnect switch?
A. Increase voltage
B. Reduce resistance
C. Isolate electrical equipment
D. Store energy
Disconnects allow safe maintenance.
22. What is the maximum voltage for low-voltage systems?
A. 30V
B. 50V
C. 600V
2026 | Latest Real Exam Questions & Answers
(Verified)
1. What is the minimum working space depth in front of electrical equipment operating at
150V to ground?
A. 2 ft
B. 3 ft
C. 3.5 ft
D. 4 ft
The NEC requires a minimum of 3 feet of working clearance for systems up to 150V to
ground.
2. Which NEC article covers grounding and bonding requirements?
A. 110
B. 210
C. 250
D. 300
Article 250 specifically addresses grounding and bonding.
3. What is the maximum overcurrent protection allowed for 12 AWG copper conductors?
A. 15 amps
B. 20 amps
C. 25 amps
D. 30 amps
12 AWG copper conductors are typically rated for 20 amps under standard conditions.
4. What type of conduit is permitted for direct burial without additional protection?
A. EMT
B. FMC
C. PVC Schedule 40
D. RMC
PVC Schedule 40 is commonly approved for direct burial.
5. What is required when conductors are installed in parallel?
A. Different lengths allowed
B. Mixed conductor sizes allowed
C. Same length, size, and material required
D. Only same insulation required
Parallel conductors must be identical to ensure equal load distribution.
6. What is the minimum burial depth for rigid metal conduit under a driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Rigid metal conduit typically requires 18 inches burial depth under driveways.
7. What device protects against ground-fault current in personnel protection?
A. AFCI
, B. Breaker
C. GFCI
D. Fuse
GFCIs protect people from ground-fault hazards.
8. What is the maximum number of disconnects allowed for a service?
A. 4
B. 5
C. 6
D. 8
NEC allows up to six service disconnects.
9. What is required for equipment grounding conductors?
A. Must be insulated always
B. Must be aluminum
C. Must provide a low-impedance path to ground
D. Must be larger than phase conductors
They ensure fault current returns safely to clear faults.
10. What is the minimum size copper grounding electrode conductor for a 200A service?
A. #8 AWG
B. #6 AWG
C. #4 AWG
D. #2 AWG
#4 copper is typically required for a 200A service.
11. What NEC article covers branch circuits?
A. 110
B. 210
C. 220
D. 230
Article 210 governs branch circuits.
12. What is the purpose of bonding?
A. Increase voltage
B. Reduce current
C. Ensure electrical continuity
D. Prevent overload
Bonding connects conductive parts to maintain electrical continuity.
13. What is the standard voltage for commercial lighting circuits?
A. 120V
B. 277V
C. 240V
D. 480V
277V is commonly used in commercial lighting systems.
14. What is required for wet location boxes?
A. Painted coating
B. Weatherproof enclosure
C. Plastic only
D. Open back
Wet locations require weatherproof enclosures.
, 15. What is the maximum fill for conduit?
A. 25%
B. 31%
C. 40%
D. 50%
Maximum conduit fill is generally 40%.
16. What is the minimum size conductor for general lighting circuits?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
Commercial lighting circuits typically require 12 AWG.
17. What type of breaker protects against arc faults?
A. GFCI
B. Fuse
C. AFCI
D. Disconnect
AFCIs detect dangerous arc faults.
18. What must be grounded in a system?
A. Only neutral
B. Only equipment
C. System and equipment
D. None
Both system grounding and equipment grounding are required.
19. What is the minimum headroom for working space?
A. 5 ft
B. 6.5 ft
C. 7 ft
D. 8 ft
NEC requires at least 6.5 feet of headroom.
20. What is required for panelboards in damp locations?
A. Painted steel
B. Enclosure rated for damp locations
C. Ventilation holes
D. Wood backing
Proper enclosure rating is necessary for safety.
21. What is the purpose of a disconnect switch?
A. Increase voltage
B. Reduce resistance
C. Isolate electrical equipment
D. Store energy
Disconnects allow safe maintenance.
22. What is the maximum voltage for low-voltage systems?
A. 30V
B. 50V
C. 600V
