Residential Electrician Exam #4 – electrical systems practice exam, wiring methods, and
revision material
D: No additional electrodes are required.
Ref: 250.32(A), Ex. - ✔✔When a single branch-circuit with an equipment grounding conductor
is supplying a detached garage from a house, what, if any, additional grounding electrode(s)
is/are required at the garage?
a) A ground rod and underground metal water pipe.
b) A metal underground water pipe only.
c) A metal underground water pipe and building steel, if available.
d) No additional electrodes are required.
B: 10 feet
Ref: 230.26 - ✔✔The point of attachment of a service drop to a residence where the voltage is
120 volts to ground is required to be at LEAST _____ above grade.
a) 8 feet
b) 10 feet
c) 12 feet
d) 15 feet
D: 1⁄ 8
Ref: 430.109(B) - ✔✔The branch-circuit overcurrent protection device shall be permitted to
serve as the disconnecting means for stationary motors rated NOT greater than _____
horsepower.
a) 2
b) 1
c) 1⁄ 2
d) 1⁄ 8
, C: supported by braces or guys
Ref: 230.28 - ✔✔When installing an overhead service using a rigid metal conduit (RMC) mast
for the support of the service-drop conductors, the mast shall be of adequate strength or be
_____ to withstand safely the strain imposed by the service drop.
a) at least 2 inches in diameter
b) a minimum of 3 inches in diameter
c) supported by braces or guys
d) less than 4 feet in length
A: 5 feet
Ref: 680.43(C) - ✔✔When wall switches are installed in the same room with a spa or hot tub,
the MINIMUM distance from the switches to the inside wall of the hot tub or spa shall be
_____.
a) 5 feet
b) 10 feet
c) 15 feet
d) 18 feet
C: 20 feet
Ref: 680.22(A)(4) - ✔✔All 15- and 20-ampere, single-phase, 125-volt receptacle outlets located
at LEAST _____ from the inside walls of a swimming pool shall be provided with GFCI
protection.
a) 10 feet
b) 15 feet
c) 20 feet
d) 25 feet
revision material
D: No additional electrodes are required.
Ref: 250.32(A), Ex. - ✔✔When a single branch-circuit with an equipment grounding conductor
is supplying a detached garage from a house, what, if any, additional grounding electrode(s)
is/are required at the garage?
a) A ground rod and underground metal water pipe.
b) A metal underground water pipe only.
c) A metal underground water pipe and building steel, if available.
d) No additional electrodes are required.
B: 10 feet
Ref: 230.26 - ✔✔The point of attachment of a service drop to a residence where the voltage is
120 volts to ground is required to be at LEAST _____ above grade.
a) 8 feet
b) 10 feet
c) 12 feet
d) 15 feet
D: 1⁄ 8
Ref: 430.109(B) - ✔✔The branch-circuit overcurrent protection device shall be permitted to
serve as the disconnecting means for stationary motors rated NOT greater than _____
horsepower.
a) 2
b) 1
c) 1⁄ 2
d) 1⁄ 8
, C: supported by braces or guys
Ref: 230.28 - ✔✔When installing an overhead service using a rigid metal conduit (RMC) mast
for the support of the service-drop conductors, the mast shall be of adequate strength or be
_____ to withstand safely the strain imposed by the service drop.
a) at least 2 inches in diameter
b) a minimum of 3 inches in diameter
c) supported by braces or guys
d) less than 4 feet in length
A: 5 feet
Ref: 680.43(C) - ✔✔When wall switches are installed in the same room with a spa or hot tub,
the MINIMUM distance from the switches to the inside wall of the hot tub or spa shall be
_____.
a) 5 feet
b) 10 feet
c) 15 feet
d) 18 feet
C: 20 feet
Ref: 680.22(A)(4) - ✔✔All 15- and 20-ampere, single-phase, 125-volt receptacle outlets located
at LEAST _____ from the inside walls of a swimming pool shall be provided with GFCI
protection.
a) 10 feet
b) 15 feet
c) 20 feet
d) 25 feet
