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Where the NEC uses the word approved related to installations of conductors and equipment, it is defined as acceptable to the ? .
a.authority having jurisdiction
b.electrical contractor
c.equipment listing agency
d.owner
The correct answer is: authority having jurisdiction
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Which of the following best defines the circuit conductors between the final overcurrent
protective device and the outlet(s)?
a.Branch circuit
b.Electrical wiring
c.Feeder
d.Supplemental branch circuit
The correct answer is: Branch circuit
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A ? is generally not considered an outlet by the NEC.
a.box with a surge-protective device (SPD) receptacle
b.device box with a 3-way switch
c.device box with a duplex receptacle
d.device box with a GFCI receptacle
The correct answer is: device box with a 3-way switch
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Which of the following are common elements and considerations to all wiring device
installations?
a.The finish cover or plate used
b.The type of device box or box and plaster ring combination used
c.The wiring method used
d.All of the above
The correct answer is: All of the above
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If the branch-circuit wiring in conduit to a receptacle is installed in the building walls, the
wiring is considered to be ? .
a.concealed
b.exposed
c.finished
d.inaccessible
The correct answer is: concealed
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Boxes are generally required in branch-circuit wiring at ? .
a.conductor splice points
b.junction or pull points
c.receptacle outlet and switch points
d.all of the above
The correct answer is: all of the above
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Boxes used for wiring devices such as switches and receptacles must provide ?
support.
a.additional
b.minimal
c.structural
d.substantial
The correct answer is: substantial
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Specific receptacle and switch box mounting heights are required by the ? .
a.Americans with Disabilities Act Guidelines (ADA)
b.International Residential Code
c.National Electrical Code
d.National Electrical Installation Standard
The correct answer is: Americans with Disabilities Act Guidelines (ADA)
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Where a device box is installed in a wall or ceiling that has a finish surface made of
gypsum wallboard, what is the maximum distance that the face of the box or plaster ring
is permitted to be set back from the finish?
a.6 mm (1/4")
b.13 mm (1/2")
c.No set back permitted
d.None of the above
The correct answer is: 6 mm (1/4")
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The maximum gap permitted between drywall and the edge of a device box or plaster
ring shall not be greater than ? .
a.3 mm (1/8")
b.6 mm (1/4")
c.50 mm (2")
d.100 mm (4")
The correct answer is: 3 mm (1/8")
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Where the branch-circuit wiring is installed (fished) in existing hollow spaces of walls or
ceilings, the device boxes are required to be secured to the ? .
a.finished surface
b.metal framing member of the wall or ceiling
c.wood framing member of the wall or ceiling
d.none of the above
The correct answer is: finished surface
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Where branch-circuit conductors enter a standard single-gang device box, the minimum
length of free conductor measured from the face of the box or plaster ring shall be not
less than ? .
a.75 mm (3")
b.150 mm (6")
c.200 mm (8")
d.300 mm (12")
The correct answer is: 75 mm (3")
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When determining conductor fill (volume allowances) at device boxes, branch-circuit
conductors that pass through a device box without a splice or termination are required to
be counted in accordance with which of the following volume allowances?
a.All must be counted as one conductor.
b.Each conductor must be counted once.
c.They are not required to be counted.
d.None of the above
The correct answer is: Each conductor must be counted once.
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When conductors are pulled through a device box, what is the minimum length required
for such conductors?
a.Not less than 75 mm (3")
b.Not less than 150 mm (6")
c.Not less than 200 mm (8")
d.Minimum length is not required.
The correct answer is: Minimum length is not required.
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When a GFCI receptacle device is installed on a 20-ampere branch circuit (12 AWG
copper), what is the minimum volume allowance (in cubic inches) required for conductor
fill for each conductor in the outlet box?
a.2.25 in^3
b.4.00 in^3
c.4.50 in^3
d.5.00 in^3
The correct answer is: 2.25 in^3
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Where standard device boxes are used and all the conductors in the box are of the same
size in AWG, which of the following NEC tables is permitted to be used to determine the
minimum size required for the box?
a.Table 250.122
b.Table 310.16
c.Table 314.16(A)
d.Table 400.4
The correct answer is: Table 314.16(A)
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Where a multiwire branch circuit in a dwelling unit is connected to a duplex receptacle
using an ungrounded (hot) conductor to each of the receptacles on the device (splitwired) and a common neutral conductor connected to the receptacle, which of the
following is required?
a.A means to disconnect simultaneously all ungrounded conductors must be provided
where the circuit originates.
b.The overcurrent device(s) ahead of the circuit must not exceed 15 A.
c.The receptacle must be identified for the purpose.
d.The receptacle must be rated at 20 A.
The correct answer is: A means to disconnect simultaneously all ungrounded conductors must be provided where the circuit originates.
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Branch-circuit conductors may be connected to the terminals of receptacle wiring
devices by wrapping the conductor around the screw terminals of the device or by using
“push-in” stabbing terminals on the device. What is the maximum size conductor
permitted for devices where the “push-in” method is used?
a.14 AWG copper (solid)
b.12 AWG aluminum
c.12 AWG copper
d.10 AWG aluminum
The correct answer is: 14 AWG copper (solid)
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Terminals on receptacles intended for connection of grounded neutral conductors are
required to be identified by which of the following methods?
a.A terminal that is metal or metal coated in a substantially white color
b.The letter “W” adjacent to the identified terminal
c.Where the terminal is not visible, the word “White” or “W” next to the hole for the
grounded conductor or the entrance hole for the conductor shall be colored white
d.Any of the above
The correct answer is: Any of the above
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A ? is an acceptable means of identification of the equipment grounding conductor
terminal on a duplex receptacle.
a.brass colored screw terminal on the receptacle
b.terminal identified by a green-colored finish, the words “green” or “ground,” or the
letters “G” or “GR,” or a grounding symbol
c.terminal identified by a white color
d.terminal that is hexagon in shape
The correct answer is: terminal identified by a green-colored finish, the words “green” or
“ground,” or the letters “G” or “GR,” or a grounding symbol
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The conductor used to connect from the equipment grounding conductors in a device
outlet box to a grounding terminal of a grounding-type receptacle is a(n) ? .
a.equipment bonding jumper
b.grounded conductor
c.grounding conductor
d.main bonding jumper
The correct answer is: equipment bonding jumper
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Where a device box is fastened to a framing member and the screw or nail passes
through the box, which of the following is an acceptable location for the screw or nail
used to fasten the box?
a.It is not permitted to pass through the box.
b.It is permitted, but must not be more than 6 mm (1/4") from the back or end of the
enclosure.
c.It is permitted to pass through the box in any manner so as to not damage the
conductors or device within the box or enclosure.
d.It must pass through the box and be located not more than 25 mm (1") from the back of
the box.
The correct answer is: It is permitted, but must not be more than 6 mm (1/4") from the back or end of the enclosure.
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What is the maximum overcurrent protection rating for a circuit of 12 AWG THHN
conductors (after any applicable correction factors) that originate from a circuit breaker
in a panelboard and terminate directly on a 20-ampere receptacle? Note that the breaker
and receptacle are not marked with temperature ratings.
a.15 A
b.20 A
c.25 A
d.30 A
The correct answer is: 20 A
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What is the minimum size equipment-grounding conductor required for a branch circuit
protected by an overcurrent device rated at 40 amperes supplying a range receptacle
rated at 50 amperes?
a.12 AWG copper
b.10 AWG aluminum
c.10 AWG copper
d.None of the above
The correct answer is: 10 AWG copper
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What is the minimum size equipment-bonding jumper used to connect a grounding-type
receptacle to a grounded metal box where the branch circuit supplying the receptacle
circuit is protected by a 30-ampere overcurrent protective device?
a.14 AWG copper
b.12 AWG copper
c.10 AWG aluminum
d.10 AWG copper
The correct answer is: 10 AWG copper
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How many volume allowances must be taken for each device installed in an outlet box?
a.1
b.2
c.3
d.4
The correct answer is: 2
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What is the minimum cubic inch capacity required for 12 AWG copper conductors in an
outlet box?
a.1.75 in^3
b.2.00 in^3
c.2.25 in^3
d.2.50 in^3
The correct answer is: 2.25 in^3
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Where an outlet box (having no cable clamps) contains a receptacle and four 12-2 NM
cables, what is the minimum cubic inch capacity required for the box?
a.18.0 in^3
b.21.5 in^3
c.24.75 in^3
d.30.0 in^3
The correct answer is: 24.75 in^3
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A device or utilization equipment wider than a single 50 millimeter (2 inch) device box as
described in NEC Table 314.16(B)(4) shall have a ? volume allowance provided for each gang required for mounting the device.
a.single
b.double
c.triple
d.quadruple
The correct answer is: double
