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Residential Wiring Questions and Answers (100% Pass)
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Residential Wiring Questions and Answers (100% Pass)
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1|Page | © copyright 2024/2025 | Grade A+Residential Wiring Questions and
Answers (100% Pass)
Define the Service Point
✓ NEC Article 100
✓
✓ The point of connection between the facilities of the serving utility and
the premises wiring. Utility provides electricity from the supply side
because they are giving it to us and we receive it on the load side.
Define the service-drop conductors
✓ NEC Article 100
✓
✓ The overhead conductors between the serving utility and the serving
point. These conductors are installed, maintained, and owned by
electrical utility.
Who is responsible for determining the service location?
✓ Electric utility
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
a. The service head must be located (above) (below) the point where the
service-drop conductors are spliced to the service-entrance conductors
✓ Above
b. What code section provides the answer to part (a)
✓ NEC Article 230.26
What is a mast-type service entrance?
✓ The most common method for installing an overhead service entrance.
Most commonly used in areas where the electric utility distribution
system has not been installed underground. Lies beneath the service
head.
When a conduit is extended through a roof, must it be guyed?
✓ Only for extra support
a. What size and type of conductors are installed for the service in this text?
✓ Panelboard A: 2 AWG, 4 AWG, and 6 AWG
✓ Panelboard B: 3 AWG and 8 AWG
b. What size conduit is installed?
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
✓ Panelboard A: size 2 and size 1 for the other two
✓ Panelboard B: Size 3 and size 1
What size grounding electrode conductor is installed?
✓ 4 AWG copper grounding electrode conductor (GEC)
Is the grounding electrode conductor insulated, armored, or bare?
✓ Armored
How and where is the grounding electrode conductor attached to the water
pipe?
✓ With a listed ground clamp to the metal water pipping where the
pipping comes through the basement wall.
a. Overhead service conductor clearance over private driveway:
✓ 12 ft minimum
b. Overhead service conductor clearance over private sidewalks:
✓ 10 ft minimum
c. Overhead service conductor clearance over alleys:
Master01 | October, 2024/2025 | Latest update
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