Residential Wiring Final
A newly constructed homes, smoke detectors are required to have _____ for the primary sources of power.
120-volt ac
During the winter, it is suggested that a paddle fan should
draw up air
A receptacle below a 4-way switch in the corner of a living room is required because the Code requires that a receptacle be installed in any wall space _____in. or more in width.
24
Receptacle outlets must be installed in any wall space ______ or more in width.
24in (600mm)
Article ___, Part VI, covers equipment grounding and equipment grounding conductors.
250
Exhaust fan ventilating capability is rated in ___.
CFM
Fire is the second leading cause of accidental death.
False
NFPA 72 29.1.2 states that smoke and heat alarms shall be installed in all occupancies where required by governing laws, codes, or standards. This puts the responsibility on the local building department.
True
Fire-protective signaling systems installed in homes have ____ circuits where the power output is limited by the listed power supply for the system.
Type PLFA
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.
a barrier
When someone decides to use a bedroom as a home office instead,
a lot of electronic equipment will have to be plugged in
GFCI protected receptacles ____ permitted to be installed within a tub or shower space.
are not
For most residential electric ___, receptacles and cord sets are rated 30 amperes, 125/250 volts.
clothes dryers
How many lighting outlets are permitted on one branch circuit?
no limit
NEC 430.103 requires that a disconnecting means for a motor shall ___ ungrounded conductors.
open all
The NEC _____ in a dwelling.
requires at least one communication outlet.
Ceiling fans must be specially supported for all of the following reasons, except for
safe grounding
A light dimmer ______ be used as a speed control for a ceiling fan or other motor.
should not
All 125-volt, 15- and 20-ampere receptacles installed to serve a kitchen countertop are required ____.
to be supplied by at least two 20-ampere small appliance circuits, to have GFCI protection for personnel, to be installed within 24 inches of the sink.
The 125-volt, 20-ampere receptacles installed to serve kitchen countertops are required to have GFCI protection ___.
under all circumstances
According, to NEC 250.142(B), NEVER ground an appliance to the ___ grounded circuit conductor.
white
The maximum volt-ampere loading permitted on a 20-ampere branch circuit with a continuous load is
1920 VA
Transformers and low-voltage wiring for doorbells are classified as ____ circuits under Article 725.
Class 2
Lighting track in residential installations must not be installed
in damp or wet locations; concealed; through walls or partitions
In a home office, the current draw is
low
A wall-mounted smoke alarm shall not be mounted further than ____ in. from the corner where the ceiling meets the wall.
12
A receptacle below a 4-way switch in the corner of a living room is required because the Code requires that a receptacle be installed in any wall space ____ in. or more in width.
24
The maximum flexible cord length permitted for a kitchen waste disposer is ___.
3ft (900mm)
Ceiling-suspended paddle fans must nt be located within a zone measured ____ horizontally and ____ vertically from the top of the bathtub rim or top of a shower stall threshold.
3ft (900mm), 8ft (2.5m)
Ceiling-suspended paddle fans must not be located within a zone measured _____ horizontally and ____ vertically from the top of the bathtub rim or top of a shower stall threshold.
3ft (900mm); 8ft (2.5m)
A doorjamb switch is usually mounted about _____ feet above the floor, on the inside of the 2x4 framing on the hinge side of the closet door.
6
A feeder or service neutral load can be figured at ___ of the load on the ungrounded conductors for ranges and ovens.
70 percent
The type of cable most often used for television signal distribution in new residences is _____.
75-ohm RG6 coaxial
Cord and plug connected appliances shall not exceed ___ percent of the branch-circuit rating.
80
Television antennas and lead-in wires are covered under Article
810
Antennas and lead-in conductors may be attached to an electric service mast if they are kept a minimum of 36 in. (900mm) below the power conductors.
False
On the outside of a building, position and fasten lead-in conductors so they cannot swing closer than 24 in. (600mm) to light and power conductors having not over 250 volts between conductors; 8ft (3 m) if over 250 volts between conductors.
False
GFCI protection can be provided for convenience receptacles serving kitchen countertop areas by _____.
GFCI circuit breakers, installing a GFCI-protected receptacle at each location, installing a single feed-through type GFCI receptacle to protect downstream receptacles.
Receptacles installed within 6 feet of a wet bar are required to have
GFCI protection and to not be installed face up in countertops unless listed for such installations.
Which of the following switch types is rarely used in residential wiring?
double-pole
Many electricians wire the lights and receptacles in a room on different circuits because this
offers the advantage that all power in a room will not go out if the overcurrent protective device trips
Many electricians wire the lights and receptacles in a room on different circuits because this _____.
offers the advantage that all power in a room will not go out if the overcurrent protective device trips.
When an existing dryer or electric range, the NEC ___ the grounded conductor of an existing individual branch circuit to be used for grounding the appliance frame.
permits
Ceiling fan speed can be controlled by
pull chain on the fan; speed control mounted in a wall box; remote control similar to TV/VCR type
In accessible attics, exposed cables must be protected by guard strips when ___.
they are run across the top of joists, they are run across the face of studs, they are installed within 7 feet of the floor or floor joists
When using nonmetallic boxes, the volume allowance is based on ______
wiring devices; cable clamps; equipment grounding conductors
The NEC requires GFCI protection for ___.
hydromassage tubs and all their associated electrical components.
The National Fire Alarm Code (NFPA 72) Requires that the fire alarm equipment be ____.
listed
When installing a ceiling paddle fan, the outlet box must be _____.
listed and marked as acceptable for fan support
Lighting track in residential installations shall not be cut to length in the field unless permitted by the ______
manufacturer
Electronic dimmers use triacs to chop the ac sine wave, so some incandescent lamps might ______ because the lamp filament vibrates.
hum
When designing a home office, you could consider roughing in more wall receptacles than the NEC
minimum
Residential telephone conductor installations must be made in accordance with the requirements of ____.
Article 800
A ____ is a device suitable for connection to a circuit that has a sensor that responds to a physical stimulus such as heat or smoke.
detector
Recessed or surfaced-mounted luminaires and recessed exhaust fans may be located within the restricted zone near the bathtub
may
Which of the following kitchen equipment is permitted to be connected to the two 20-amp and small-appliance circuits required for the kitchen and dining room area?
Clock outlet
Which of the following rules apply to coaxial cable installations under Article 820?
The outer shield of the coaxial cable must be grounded close to its point of entry into the building. Coaxial cables shall not be run int he same conduits or box with electrical light and power conductors. Do not support coaxial cables from raceways that contain electrical light and power conductors.
NEC 210.70(A)(3) requires that at least one lighting outlet must be installed in an ___ and that this lighting outlet contain a switch such as a pull-chain lampholder, or be controlled by a switch located near the entry.
attic
When installing a ceiling paddle fan, the outlet box must be
listed and marked as acceptable for fan support
Sliding glass panels ______ considered to be wall space, the same as any other interior or exterior door.
are not
Receptacle outlets must be installed in any wall space _____ or more in width.
24 in. (600 mm)
Lighting track ______ permitted to be installed within a zone extending 3ft horizontally and 8ft vertically from the top of a bathtub rim.
is not
A smoke alarm on a flat ceiling shall be mounted at least ____ in. away from the corner.
4
When a separate branch-circuit is run to a wall-mounted oven or to a counter-mounted cooking unit, the branch circuit size is based on ___ of the nameplate rating of the appliance.
100 percent
An individual motor disconnect must be in sight of the motor controller and must disconnect the controller. The NEC definition of in sight means that the controller must be visible and not more than ___ from the disconnect.
50ft (15m)
A ____ is described in the NEC as any electric that energizes signaling equipment.
signaling circuit
A light above a workbench is an example of
task lighting
In addition to being fastened to the outlet box, the track for track lighting is generally fastened to the ceiling with _____.
toggle bolts and screws
In addition to being fastened to the outlet box, the track for track lighting is generally fastened to the ceiling with ___.
toggle bolts, screws
The NEC allows what maximum number of receptacle outlets to be connected on a 120-volt residential lighting or small-appliance branch circuit?
unlimited
In a room that may be used as a home office, you could consider
using 12 AWG for the home run or even the entire branch circuit(s); wiring in quadplex receptacles instead of duplex receptacles; using only plug-in strips that are UL listed
A location exposed to the weather is a _____ location
wet
Install luminaires listed for _____ locations if they will be subject to shower spray.
wet
All 15- and 20-ampere receptacles installed within 6ft (1.8 m) of a _____ sink must be GFCI protected.
wet bar, laundry, utility
The maximum overcurrent protection for ___ AWG copper conductors is 30 amperes.
10
Dual-voltage-rated pump motors are rated ____.
115/230
The load for each small-appliance, branch circuit load is required to be calculated at ____.
1500 volt-amperes
The Code permits all bathroom receptacles to be on a single _____ branch circuit so long as it doesn't supply other loads
20-ampere
Prior to the 1996 NEC, ___ receptacles and cords were permitted. However, not it is mandatory that a separate equipment grounding conductor be installed to ground the frames of electric clothes dryers and electric ranges.
3-wire
Electric washer/dryer combinations generally require a ___ - ampere branch circuit similar to that required for a typical electric clothes dryer.
30
Ceiling fan boxes designed to support more than ____ pounds must have the maximum weight they are designed to support included included in the marking.
35
Ceiling fan boxes designed to support more than _____ pounds must have the maximum weight they are designed to support included in the marking.
35
Lighting track is not permitted to be installed less than _____ above a finished floor unless it is protected against physical damage, or if the track is of the low-voltage type operating at less than 30 volts rms open-circuit voltage.
5 ft
The article that covers cable TV wiring installations in residences is Article ____.
820
According to NFPA 72, fire warning equipment has two primary purposes: to provide protection to property, and to provide a reliable means to notify the occupants of the presence of a threatening fire and the need to escape to a place of safety.
False
A duplex grounding-type receptacle is usually installed in an accessible location under the sink for plugging in the dishwasher and food waste disposer, and it does not have to be ___ protected.
GFCI
Plug-in detectors are not permitted in new construction.
True
The photoelectric type of alarm is less effective for gasoline and alcohol fires, which do not produce heavy smoke.
True
Glass panels ____ considered to be wall space, the same as any other interior or exterior door.
are
Lighting fixtures marked "Recessed Fluorescent Luminaire" ____ permitted to be installed in a suspended ceiling
are
GFCI-protected receptacles _____ permitted to be installed within a tub or shower space.
are not
As defined in Article 100, a bathroom is required to have a
basin
As defined in Article 100, a bathroom is required to have a ____.
basin
Most duplex receptacles can be changed into "split-wired" receptacles by ___.
breaking off the small metal tab on the terminals.
The selection of outlet boxes and switch boxes is made by the electrician. These decisions are based on Code requirements, space allowances, good wiring practices, and
common sense
Residential wiring plans generally show lighting and receptacles outlet locations but not circuits. The electrician should design the installation with which of the following in mind?
economy-minimizing the number and length of circuits; convenience for the homeowner or other user; NEC requirements
Which of the following is required in order to dim fluorescent fixtures?
fluorescent dimmer; dimming ballasts
Receptacles installed on 15- and 20-ampere branch circuits must be of the ______ type.
grounding
Where the values of branch-circuit protection required for motors according to Table 430.52 do not correspond to standard ratings as listed in NEC 240.6, the next ___ rating is permitted to be used.
higher
Kitchen lighting _____ permitted to be supplied by the two 20-ampere small-appliance circuits required for the kitchen and dining room area.
is not
Lighting track ___ permitted to be installed within a zone extending 3 feet horizontally and 8 feet vertically from the top of a bathtub rim.
is not
Lighting fixtures intended for installation in wet locations must be
marked "suitable for wet locations"
A raised plaster cover (often called a plaster ring or mud ring) is permitted to increase the maximum number of conductors permitted in an outlet box when it is
marked with its cubic-inch volume
A raised plaster cover (often called a plaster ring or mud ring) is permitted to increase the maximum number of conductors permitted in an outlet box when it is ________.
marked with its cubic-inch volume
The NEC defines a kitchen as an area with a sink and ____ provisions for food preparation and cooking.
permanent