Electrical Inspector/ Electrical
{National Electrical Code}
Competency Study Guide
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. What is considered unsuitable to wear during an inspection?
A. nylon clothing
B. safety glasses
C. leather shoes - Correct Answer: A. nylon clothing
2. What should you put into an electrical panel?
A. an amp probe
B. a torque wrench
C. none of these
D. a wire gauge - Correct Answer: C. none of these
3. If __________________ are present, the panel should not be opened to
inspect.
A. rusting enclosure
B. any of these
C. moisture dripping from the enclosure
D. sounds of arcing - Correct Answer: B. any of these
,4. A live wire is sometimes called what?
A. An ungrounded conductor
B. A grounded conductor
C. A grounding conductor - Correct Answer: A. An ungrounded
conductor
5. What is another commonly-used name for the main panel?
A. electrical panel
B. meter
C. dead front cover
D. main disconnect switch - Correct Answer: A. electrical panel
6. If a service disconnect is not present at a panelboard, the panelboard is
sometimes called a _____________.
A. disconnect switch
B. service panel
C. main panel
D. sub-panel - Correct Answer: D. sub-panel
7. Branch circuit conductors
A. Amp suppliers.
B. Wires to outlets.
C. Receptacle cables. - Correct Answer: B. Wires to outlets.
8. What unit is used to measure resistance?
A. Ohms
B. Amps
, C. Watts - Correct Answer: A. Ohms
9. Voltage is equal to ________.
A. power x amperage
B. amps x resistance
C. watts x current - Correct Answer: B. amps x resistance
10.W = E x __________.
A. Q
B. O
C. I
D. R - Correct Answer: C. I
11.What type of branch circuit conductors should be sized one to two sizes
larger than copper?
A. Zinc
B. Tin
C. Aluminum
D. Iron
E. Platinum - Correct Answer: C. Aluminum
12.What amp breaker should supply a minimum #12 conductor?
A. 10
B. 100
C. 20
D. 40 - Correct Answer: C. 20
, 13.If a service entrance has a 200-amp supply what should the minimum cable
size be?
A. 2/0 copper or 4/0 aluminum
B. 1/0 copper or 2/0 aluminum
C. 4/0 copper or 2/0 aluminum
D. 5/0 copper or 1/0 aluminum - Correct Answer: A. 2/0 copper or
4/0 aluminum
14.The minimum conductor size for a ______-amp service is 4-awg copper or
2-awg aluminum.
A. 100
B. 400
C. 200
D. none of these - Correct Answer: A. 100
15.How far away should a service drop be from trees?
A. 1 to 2 feet
B. 2 to 3 feet
C. 4 to 5 feet
D. 5 to 6 feet - Correct Answer: D. 5 to 6 feet
16.How does an electrical service mast that extends 5 feet or more above the
roof surface need to be supported?
A. none of these-
B. Separately
C. It will be supported by mast
D. It will be supported by the roof structure- - Correct Answer:
{National Electrical Code}
Competency Study Guide
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. What is considered unsuitable to wear during an inspection?
A. nylon clothing
B. safety glasses
C. leather shoes - Correct Answer: A. nylon clothing
2. What should you put into an electrical panel?
A. an amp probe
B. a torque wrench
C. none of these
D. a wire gauge - Correct Answer: C. none of these
3. If __________________ are present, the panel should not be opened to
inspect.
A. rusting enclosure
B. any of these
C. moisture dripping from the enclosure
D. sounds of arcing - Correct Answer: B. any of these
,4. A live wire is sometimes called what?
A. An ungrounded conductor
B. A grounded conductor
C. A grounding conductor - Correct Answer: A. An ungrounded
conductor
5. What is another commonly-used name for the main panel?
A. electrical panel
B. meter
C. dead front cover
D. main disconnect switch - Correct Answer: A. electrical panel
6. If a service disconnect is not present at a panelboard, the panelboard is
sometimes called a _____________.
A. disconnect switch
B. service panel
C. main panel
D. sub-panel - Correct Answer: D. sub-panel
7. Branch circuit conductors
A. Amp suppliers.
B. Wires to outlets.
C. Receptacle cables. - Correct Answer: B. Wires to outlets.
8. What unit is used to measure resistance?
A. Ohms
B. Amps
, C. Watts - Correct Answer: A. Ohms
9. Voltage is equal to ________.
A. power x amperage
B. amps x resistance
C. watts x current - Correct Answer: B. amps x resistance
10.W = E x __________.
A. Q
B. O
C. I
D. R - Correct Answer: C. I
11.What type of branch circuit conductors should be sized one to two sizes
larger than copper?
A. Zinc
B. Tin
C. Aluminum
D. Iron
E. Platinum - Correct Answer: C. Aluminum
12.What amp breaker should supply a minimum #12 conductor?
A. 10
B. 100
C. 20
D. 40 - Correct Answer: C. 20
, 13.If a service entrance has a 200-amp supply what should the minimum cable
size be?
A. 2/0 copper or 4/0 aluminum
B. 1/0 copper or 2/0 aluminum
C. 4/0 copper or 2/0 aluminum
D. 5/0 copper or 1/0 aluminum - Correct Answer: A. 2/0 copper or
4/0 aluminum
14.The minimum conductor size for a ______-amp service is 4-awg copper or
2-awg aluminum.
A. 100
B. 400
C. 200
D. none of these - Correct Answer: A. 100
15.How far away should a service drop be from trees?
A. 1 to 2 feet
B. 2 to 3 feet
C. 4 to 5 feet
D. 5 to 6 feet - Correct Answer: D. 5 to 6 feet
16.How does an electrical service mast that extends 5 feet or more above the
roof surface need to be supported?
A. none of these-
B. Separately
C. It will be supported by mast
D. It will be supported by the roof structure- - Correct Answer:
