ICC Commercial Electrical Inspector (E2) Practice
Exam Questions with Answers and Rationales|
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Question 1
According to NEC 110.26, what is the minimum required working space in front of
electrical equipment operating at 150 volts to ground?
A) 2 feet
B) 2.5 feet
C) 3 feet
D) 3.5 feet
Correct Answer: C
Explanation: NEC 110.26(A)(1) requires a minimum working space of 3 feet (914 mm) in
front of electrical equipment operating at 150 volts or less to ground, provided there is no
live or grounded parts on the opposite side of the workspace .
Question 2
What is the minimum clearance required for a dedicated equipment space extending
from the floor to a height of 6 feet above the equipment?
A) The width and depth of the equipment
B) 30 inches wide and 36 inches deep
C) The width of the equipment plus 6 inches on each side
D) 36 inches wide and 42 inches deep
Correct Answer: A
Explanation: NEC 110.26(E)(1)(a) requires the dedicated equipment space to extend from
the floor to a height of 6 feet above the equipment or to the structural ceiling, whichever is
lower, and shall have a width and depth sufficient for the equipment .
,Question 3
What does "readily accessible" mean under the NEC?
A) Capable of being reached without damaging the building finish
B) Capable of being reached quickly without climbing over obstacles or using tools
C) Located within sight of the equipment being serviced
D) Accessible to authorized personnel only
Correct Answer: B
Explanation: NEC Article 100 defines "readily accessible" as capable of being reached
quickly for operation, repair, or inspection without requiring those to climb over or remove
obstacles or to use portable ladders, tools, or equipment .
Question 4
Which of the following is NOT an enforceable requirement of the NEC?
A) Mandatory rules identified by the word "shall"
B) Permissive rules identified by the word "shall be permitted"
C) Fine print notes (FPN) or informational notes
D) Exceptions to mandatory rules
Correct Answer: C
Explanation: Informational notes (formerly FPNs) are explanatory material and are not
enforceable as code requirements. Only the text identified by "shall" or "shall not" carries
mandatory requirements .
Question 5
What is the maximum number of disconnects permitted to disconnect all power in a
building or structure?
A) 3
B) 4
C) 6
D) 8
Correct Answer: C
,*Explanation: NEC 225.33 and 230.71 permit a maximum of six switches or circuit
breakers to serve as the disconnecting means for a building or structure. This is known
as the "six-handle rule" .*
Question 6
Field labeling of electrical equipment must be performed by whom?
A) Any licensed electrician
B) A certified electrical inspector
C) A nationally recognized testing laboratory (NRTL)
D) The equipment manufacturer only
Correct Answer: C
Explanation: NEC 110.21(B) requires that field labeling of electrical equipment to verify
compliance with applicable standards be performed by a nationally recognized testing
laboratory (NRTL) .
Question 7
The working space in front of electrical equipment must be clear and extend from the
floor to a height of:
A) 4 feet
B) 5 feet
C) 6 feet
D) 6.5 feet
Correct Answer: D
Explanation: NEC 110.26(A)(2) requires the working space in front of electrical equipment
to extend from the floor, platform, or grade to a height of 6.5 feet (2.0 meters) or the
height of the equipment, whichever is greater .
, Question 8
Equipment installed in a damp location must be:
A) Weatherproof
B) Watertight
C) Suitable for the location, but not necessarily weatherproof
D) Listed for wet locations
Correct Answer: C
Explanation: NEC 110.11 requires equipment in damp or wet locations to be installed so
that water cannot enter or accumulate. Damp locations require equipment suitable for the
environment, but not necessarily weatherproof (which is for wet locations) .
Question 9
What is the minimum headroom required for electrical equipment operating at 600 volts
or less?
A) 6 feet
B) 6.25 feet
C) 6.5 feet
D) 7 feet
Correct Answer: C
Explanation: NEC 110.26(A)(3) requires a minimum headroom of 6.5 feet (2.0 meters) for
electrical equipment operating at 600 volts or less, measured from the floor or working
platform .
Question 10
Equipment that is "listed" means it has been:
A) Installed by a licensed contractor
B) Inspected by the local AHJ
C) Evaluated by a qualified organization and found to meet applicable standards
D) Manufactured in the United States
Correct Answer: C
Exam Questions with Answers and Rationales|
Instant Download PDF
Question 1
According to NEC 110.26, what is the minimum required working space in front of
electrical equipment operating at 150 volts to ground?
A) 2 feet
B) 2.5 feet
C) 3 feet
D) 3.5 feet
Correct Answer: C
Explanation: NEC 110.26(A)(1) requires a minimum working space of 3 feet (914 mm) in
front of electrical equipment operating at 150 volts or less to ground, provided there is no
live or grounded parts on the opposite side of the workspace .
Question 2
What is the minimum clearance required for a dedicated equipment space extending
from the floor to a height of 6 feet above the equipment?
A) The width and depth of the equipment
B) 30 inches wide and 36 inches deep
C) The width of the equipment plus 6 inches on each side
D) 36 inches wide and 42 inches deep
Correct Answer: A
Explanation: NEC 110.26(E)(1)(a) requires the dedicated equipment space to extend from
the floor to a height of 6 feet above the equipment or to the structural ceiling, whichever is
lower, and shall have a width and depth sufficient for the equipment .
,Question 3
What does "readily accessible" mean under the NEC?
A) Capable of being reached without damaging the building finish
B) Capable of being reached quickly without climbing over obstacles or using tools
C) Located within sight of the equipment being serviced
D) Accessible to authorized personnel only
Correct Answer: B
Explanation: NEC Article 100 defines "readily accessible" as capable of being reached
quickly for operation, repair, or inspection without requiring those to climb over or remove
obstacles or to use portable ladders, tools, or equipment .
Question 4
Which of the following is NOT an enforceable requirement of the NEC?
A) Mandatory rules identified by the word "shall"
B) Permissive rules identified by the word "shall be permitted"
C) Fine print notes (FPN) or informational notes
D) Exceptions to mandatory rules
Correct Answer: C
Explanation: Informational notes (formerly FPNs) are explanatory material and are not
enforceable as code requirements. Only the text identified by "shall" or "shall not" carries
mandatory requirements .
Question 5
What is the maximum number of disconnects permitted to disconnect all power in a
building or structure?
A) 3
B) 4
C) 6
D) 8
Correct Answer: C
,*Explanation: NEC 225.33 and 230.71 permit a maximum of six switches or circuit
breakers to serve as the disconnecting means for a building or structure. This is known
as the "six-handle rule" .*
Question 6
Field labeling of electrical equipment must be performed by whom?
A) Any licensed electrician
B) A certified electrical inspector
C) A nationally recognized testing laboratory (NRTL)
D) The equipment manufacturer only
Correct Answer: C
Explanation: NEC 110.21(B) requires that field labeling of electrical equipment to verify
compliance with applicable standards be performed by a nationally recognized testing
laboratory (NRTL) .
Question 7
The working space in front of electrical equipment must be clear and extend from the
floor to a height of:
A) 4 feet
B) 5 feet
C) 6 feet
D) 6.5 feet
Correct Answer: D
Explanation: NEC 110.26(A)(2) requires the working space in front of electrical equipment
to extend from the floor, platform, or grade to a height of 6.5 feet (2.0 meters) or the
height of the equipment, whichever is greater .
, Question 8
Equipment installed in a damp location must be:
A) Weatherproof
B) Watertight
C) Suitable for the location, but not necessarily weatherproof
D) Listed for wet locations
Correct Answer: C
Explanation: NEC 110.11 requires equipment in damp or wet locations to be installed so
that water cannot enter or accumulate. Damp locations require equipment suitable for the
environment, but not necessarily weatherproof (which is for wet locations) .
Question 9
What is the minimum headroom required for electrical equipment operating at 600 volts
or less?
A) 6 feet
B) 6.25 feet
C) 6.5 feet
D) 7 feet
Correct Answer: C
Explanation: NEC 110.26(A)(3) requires a minimum headroom of 6.5 feet (2.0 meters) for
electrical equipment operating at 600 volts or less, measured from the floor or working
platform .
Question 10
Equipment that is "listed" means it has been:
A) Installed by a licensed contractor
B) Inspected by the local AHJ
C) Evaluated by a qualified organization and found to meet applicable standards
D) Manufactured in the United States
Correct Answer: C
