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. Which of the following would describe most residential services?
a) 120/240-volt
b) 240-volt only
c) 120-volt only
d) 110/220-volt - Correct Answer: 120/240-volt
2. T/F: Electrical service masts can support telephone cables.
True
False - Correct Answer: False
3. The method for installing a UF cable is __________.
direct burial
neither of these methods
above ground - Correct Answer: direct burial
4. A service entrance with ________ connected conductor(s) is a 3-phase
supply.
a) one
,b) 10+
c) four
d) zero - Correct Answer: 4
5. The typical supply for a Square brand electric meter is a ______ amps.
200
60
100 - Correct Answer: 100
6. An underground service entrance is called a __________.
service drop
service lateral
subterranean supply - Correct Answer: service lateral
7. If a flat roof is used as a garden, the minimum clearance required for the
service drop is _______ feet.
a) 18
b) 10
c) 8
d) 12 - Correct Answer: 10
8. Every 5 to 6 feet, rigid service masts should be secured to
________________.
the structure points
the base of the home
the hitch of the roof - Correct Answer: the structure points
9. Most modern 200-amp electrical meters are marked _______.
,a) 200 UL
b) 200 SEC
c) 100 SEC
d) 100 UL
e) 100 CL
f) 200 CL - Correct Answer: 200 CL
10.A service drop should be at least ________ away from any nearby trees.
a) 2 to 3 feet
b) 1 to 2 feet
c) 5 to 6 feet
d) 4 to 5 feet - Correct Answer: 5 to 6 feet
11.Service drops should never pass closer than ________ above the ridge of a
conventional pitched roof.
5 feet
3 feet
8 feet - Correct Answer: 3 feet
12.Service drops around a swimming pool should be __________.
a) 22-1/2 feet above and 10 feet horizontally away
b) 15 feet above and 8 feet horizontally away
c) 10 feet above and 20 feet horizontally away
d) 12 feet above and 15 feet horizontally away
e) 10 feet above and 22 feet horizontally away
f) 18 feet above and 10 feet horizontally away - Correct Answer: 22-1/2
feet above and 10 feet horizontally away
, 13.The minimum conductor size for a ______-amp service is 4-awg copper or
2-awg aluminum.
a. none of these
b. 100
c. 400
d. 200 - Correct Answer: 100
14.An electrical service mast that extends 5 feet or more above the roof
surface needs to be supported ____________.
by a mast
by the roof structure
separately - Correct Answer: separately
15.The clearance for open overhead service conductors from the front,
bottom, and sides of windows that ______ is 3 feet.
do not open
are tinted
open
are stained glass - Correct Answer: open
16.The ungrounded and grounding conductors can share a common bus
__________.
in any distribution panels
in the downstream distribution panels
in the service panel
never - Correct Answer: never
17.How can you bond a remote distribution panel?
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. Which of the following would describe most residential services?
a) 120/240-volt
b) 240-volt only
c) 120-volt only
d) 110/220-volt - Correct Answer: 120/240-volt
2. T/F: Electrical service masts can support telephone cables.
True
False - Correct Answer: False
3. The method for installing a UF cable is __________.
direct burial
neither of these methods
above ground - Correct Answer: direct burial
4. A service entrance with ________ connected conductor(s) is a 3-phase
supply.
a) one
,b) 10+
c) four
d) zero - Correct Answer: 4
5. The typical supply for a Square brand electric meter is a ______ amps.
200
60
100 - Correct Answer: 100
6. An underground service entrance is called a __________.
service drop
service lateral
subterranean supply - Correct Answer: service lateral
7. If a flat roof is used as a garden, the minimum clearance required for the
service drop is _______ feet.
a) 18
b) 10
c) 8
d) 12 - Correct Answer: 10
8. Every 5 to 6 feet, rigid service masts should be secured to
________________.
the structure points
the base of the home
the hitch of the roof - Correct Answer: the structure points
9. Most modern 200-amp electrical meters are marked _______.
,a) 200 UL
b) 200 SEC
c) 100 SEC
d) 100 UL
e) 100 CL
f) 200 CL - Correct Answer: 200 CL
10.A service drop should be at least ________ away from any nearby trees.
a) 2 to 3 feet
b) 1 to 2 feet
c) 5 to 6 feet
d) 4 to 5 feet - Correct Answer: 5 to 6 feet
11.Service drops should never pass closer than ________ above the ridge of a
conventional pitched roof.
5 feet
3 feet
8 feet - Correct Answer: 3 feet
12.Service drops around a swimming pool should be __________.
a) 22-1/2 feet above and 10 feet horizontally away
b) 15 feet above and 8 feet horizontally away
c) 10 feet above and 20 feet horizontally away
d) 12 feet above and 15 feet horizontally away
e) 10 feet above and 22 feet horizontally away
f) 18 feet above and 10 feet horizontally away - Correct Answer: 22-1/2
feet above and 10 feet horizontally away
, 13.The minimum conductor size for a ______-amp service is 4-awg copper or
2-awg aluminum.
a. none of these
b. 100
c. 400
d. 200 - Correct Answer: 100
14.An electrical service mast that extends 5 feet or more above the roof
surface needs to be supported ____________.
by a mast
by the roof structure
separately - Correct Answer: separately
15.The clearance for open overhead service conductors from the front,
bottom, and sides of windows that ______ is 3 feet.
do not open
are tinted
open
are stained glass - Correct Answer: open
16.The ungrounded and grounding conductors can share a common bus
__________.
in any distribution panels
in the downstream distribution panels
in the service panel
never - Correct Answer: never
17.How can you bond a remote distribution panel?
