Residential Wiring Exam Questions with Correct
Verified Solutions
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
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?
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.
Verified Solutions
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
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?
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.
