Page 1 of 192
ICC Commercial Electrical Inspector Exam (E2)
WITH COMPLETE QUESTIONS AND CORRECT
SOLUTIONS AND RATIONALES JUST RELEASED THIS
YEAR 2025-2026
1. A 200-amp commercial service has a grounding electrode conductor connecting to a ground
rod. What is the minimum size copper GEC required?
• A) 6 AWG
• B) 8 AWG
• C) 4 AWG
• D) 2 AWG
Answer: B
NEC Table 250.66 requires 8 AWG copper for a 200-amp service when connected to a rod, pipe,
or plate electrode .
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2. You inspect a panelboard in an office building and find the working space in front of the panel
is 30 inches wide. Is this compliant?
• A) Yes, 30 inches meets minimum
• B) No, working space width must be at least 36 inches
• C) No, working space width must be at least 48 inches
• D) Working space is not required for panelboards
Answer: A
NEC 110.26(A)(1) requires working space width to be the width of the equipment or 30 inches,
whichever is greater .
3. A 3-phase, 4-wire, 120/208-volt service has a calculated neutral load of 150 amps. What is
the minimum size copper neutral conductor required?
• A) 1/0 AWG
• B) 2/0 AWG
• C) 3/0 AWG
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• D) 4/0 AWG
Answer: C
NEC Table 310.15(B)(16) specifies 3/0 AWG for 150 amps; the neutral must be sized to carry the
maximum calculated load .
4. What is the maximum number of 20-amp, 120-volt receptacle outlets permitted on a
commercial general-purpose branch circuit?
• A) 8
• B) 10
• C) 13
• D) No limit, but load cannot exceed 16 amps
Answer: D
NEC 210.23(A)(1) does not limit receptacle quantity on commercial circuits; the load must not
exceed circuit rating; for 20-amp circuit, maximum continuous load is 16 amps .
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5. During an inspection of a car wash, you find a receptacle installed 3 feet from the car wash
bay floor. This location is classified as:
• A) Dry location
• B) Damp location
• C) Wet location
• D) Hazardous location
Answer: C
NEC 100 defines wet locations as those subject to saturation with water or other liquids; car
wash bays are wet locations .
6. What is the minimum size copper equipment grounding conductor required for a 400-amp
feeder?
• A) 2 AWG
• B) 1/0 AWG
• C) 2/0 AWG
ICC Commercial Electrical Inspector Exam (E2)
WITH COMPLETE QUESTIONS AND CORRECT
SOLUTIONS AND RATIONALES JUST RELEASED THIS
YEAR 2025-2026
1. A 200-amp commercial service has a grounding electrode conductor connecting to a ground
rod. What is the minimum size copper GEC required?
• A) 6 AWG
• B) 8 AWG
• C) 4 AWG
• D) 2 AWG
Answer: B
NEC Table 250.66 requires 8 AWG copper for a 200-amp service when connected to a rod, pipe,
or plate electrode .
, Page 2 of 192
2. You inspect a panelboard in an office building and find the working space in front of the panel
is 30 inches wide. Is this compliant?
• A) Yes, 30 inches meets minimum
• B) No, working space width must be at least 36 inches
• C) No, working space width must be at least 48 inches
• D) Working space is not required for panelboards
Answer: A
NEC 110.26(A)(1) requires working space width to be the width of the equipment or 30 inches,
whichever is greater .
3. A 3-phase, 4-wire, 120/208-volt service has a calculated neutral load of 150 amps. What is
the minimum size copper neutral conductor required?
• A) 1/0 AWG
• B) 2/0 AWG
• C) 3/0 AWG
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• D) 4/0 AWG
Answer: C
NEC Table 310.15(B)(16) specifies 3/0 AWG for 150 amps; the neutral must be sized to carry the
maximum calculated load .
4. What is the maximum number of 20-amp, 120-volt receptacle outlets permitted on a
commercial general-purpose branch circuit?
• A) 8
• B) 10
• C) 13
• D) No limit, but load cannot exceed 16 amps
Answer: D
NEC 210.23(A)(1) does not limit receptacle quantity on commercial circuits; the load must not
exceed circuit rating; for 20-amp circuit, maximum continuous load is 16 amps .
, Page 4 of 192
5. During an inspection of a car wash, you find a receptacle installed 3 feet from the car wash
bay floor. This location is classified as:
• A) Dry location
• B) Damp location
• C) Wet location
• D) Hazardous location
Answer: C
NEC 100 defines wet locations as those subject to saturation with water or other liquids; car
wash bays are wet locations .
6. What is the minimum size copper equipment grounding conductor required for a 400-amp
feeder?
• A) 2 AWG
• B) 1/0 AWG
• C) 2/0 AWG
