Construction Wiring NEC exam UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Residential thermostats should be located where they willnot be influenced by_______ -
CORRECT ANSWER - Drafts or currents from air registers.
radiated heat from appliances, lamps, etc
direct ray of sun light
Disconnect switches for furnaces installed in basements are required to be____. - CORRECT
ANSWER - installed within sight of the appliance.
NEC 422.12 requires that central heating equipment of any type (electric resistance, gas, oil, heat
pump) must_____. - CORRECT ANSWER - Be supplied by an individual branch circuit
Thermostats are usually mounted approximately _____ in. above the finished floor. - CORRECT
ANSWER - 52
typical class 2 wiring applications in homes include all of the following except for ____. -
CORRECT ANSWER - low voltage lighting
because they have internal overload protection, listed class 2 transformers are permitted to be
supplied by branch circuits having overcurrent protection not exceeding ______ amperes. -
CORRECT ANSWER - 20
class 2 power source voltage limitations, and overcurrent protection requirements are found in
_______. - CORRECT ANSWER - Chapter 9, Tables 11(a) and 11(b)
most residential heating systems are packaged units in which many items are preassembled,
prewired, parts of the furnace or boiler. They are included in an intergrated printed circuit board
module, which is the "____" of the system. - CORRECT ANSWER - brain
, the type of cable most often used for television signal distribution in new residences is _____. -
CORRECT ANSWER - 75-ohm RG6 coaxial
When 120-volt receptacles and TV outlets are mounted in double-gang boxes, ____ is required in
the box to isolate the TV conductors from the power wiring. - CORRECT ANSWER -a
barrier
the article that covers tv wiring installations in residences is article ______. - CORRECT
ANSWER - 820
all of the following rules apply to coaxial cable installations under article 820. - CORRECT
ANSWER - a. the outer shield of the coaxial cable must be grounded close to its point of
entry into the building
b. Coaxial cables shall not be run in the same conduits or box with electric light and power
conductors.
c. Do not support coaxial cables from raceways that contain electrical light and power
conductors.
d. all the above ( correct answer)
Television antennas and lead-in wires are covered under Article - CORRECT ANSWER -
810
Residential telephone conductor installations must be made in accordance with the requirements
of ____. - CORRECT ANSWER - article 800
Transformers and low-voltage wiring for doorbells are classified as ____ circuits under Article
725. - CORRECT ANSWER - class 2
chime transformers used in dwellings are generally rated ______ volts. - CORRECT
ANSWER - 16
ACTUAL Exam Questions and CORRECT
Answers
Residential thermostats should be located where they willnot be influenced by_______ -
CORRECT ANSWER - Drafts or currents from air registers.
radiated heat from appliances, lamps, etc
direct ray of sun light
Disconnect switches for furnaces installed in basements are required to be____. - CORRECT
ANSWER - installed within sight of the appliance.
NEC 422.12 requires that central heating equipment of any type (electric resistance, gas, oil, heat
pump) must_____. - CORRECT ANSWER - Be supplied by an individual branch circuit
Thermostats are usually mounted approximately _____ in. above the finished floor. - CORRECT
ANSWER - 52
typical class 2 wiring applications in homes include all of the following except for ____. -
CORRECT ANSWER - low voltage lighting
because they have internal overload protection, listed class 2 transformers are permitted to be
supplied by branch circuits having overcurrent protection not exceeding ______ amperes. -
CORRECT ANSWER - 20
class 2 power source voltage limitations, and overcurrent protection requirements are found in
_______. - CORRECT ANSWER - Chapter 9, Tables 11(a) and 11(b)
most residential heating systems are packaged units in which many items are preassembled,
prewired, parts of the furnace or boiler. They are included in an intergrated printed circuit board
module, which is the "____" of the system. - CORRECT ANSWER - brain
, the type of cable most often used for television signal distribution in new residences is _____. -
CORRECT ANSWER - 75-ohm RG6 coaxial
When 120-volt receptacles and TV outlets are mounted in double-gang boxes, ____ is required in
the box to isolate the TV conductors from the power wiring. - CORRECT ANSWER -a
barrier
the article that covers tv wiring installations in residences is article ______. - CORRECT
ANSWER - 820
all of the following rules apply to coaxial cable installations under article 820. - CORRECT
ANSWER - a. the outer shield of the coaxial cable must be grounded close to its point of
entry into the building
b. Coaxial cables shall not be run in the same conduits or box with electric light and power
conductors.
c. Do not support coaxial cables from raceways that contain electrical light and power
conductors.
d. all the above ( correct answer)
Television antennas and lead-in wires are covered under Article - CORRECT ANSWER -
810
Residential telephone conductor installations must be made in accordance with the requirements
of ____. - CORRECT ANSWER - article 800
Transformers and low-voltage wiring for doorbells are classified as ____ circuits under Article
725. - CORRECT ANSWER - class 2
chime transformers used in dwellings are generally rated ______ volts. - CORRECT
ANSWER - 16
