wiring methods final
A(n) ____ receptacle can be hidden behind a painting or photograph that you want to light up.
a. clock hanger
When a luminaire is connected to the conductors, the outlet is referred to as a ____ outlet
a. lighting
The load for each small-appliance, branch circuit load is required to be calculated at ____.
b. 1,500 volt-amperes
For most residential electric ____, receptacles and cord sets are rated 30 amperes, 125/250 volts.
clothes dryers
A "unit switch" used as a disconnecting means for an electric clothes dryer shall ____.
disconnects all the conductors in the appliance
The NEC requires that an appliance nameplate show ____.
either a or c
The minimum depth for a 120-volt, 15-ampere, GFCI-protected circuit to an outdoor pole light run under a paved driveway is ____.
12 inches
The NEC permits all bathroom receptacles to be on a single ____ branch circuit so long as it doesn't supply other loads.
20-ampere
A doorjamb switch is usually mounted about ____ feet above the floor, on the inside of the 2 x 4 framing on the hinge side of the closet door.
6
In a room that may be used as a home office, you could consider ____.
All of the above
What type of cable is permitted to be used for direct burial applications?
Type UF
In accessible attics, exposed cables must be protected by guard strips when ____.
all of the above
A bathroom is defined as "an area including a basin, with one or more of the following: ____.
any of the above
A 125-volt, 15- and 20-ampere receptacle installed to serve a kitchen countertop is required ____.
both a and b
Metallic conduit buried underground must be protected against ____.
corrosion
In addition to being fastened to the outlet box, the track for track lighting is generally fastened to the ceiling with ____.
d. both a and b
Conductors in a ____ fixture whip in a typical suspended ceiling "lay-in" fluorescent luminaire must have a temperature rating as required on the label in the luminaire.
flexible
Type UF "underground feeder" cable ____ permitted to be used to supply service entrances.
is not
When a single receptacle of any rating is installed on an individual branch circuit, the receptacle rating must not be ____ than the rating of the branch circuit.
less
The circuit feeding the required laundry area receptacle(s) shall have ____ outlets connected to it.
no other
In many parts of the country, the wiring method in unfinished basements is ____ in the ceiling and EMT on the walls for receptacles and switches.
nonmetallic-sheathed cable
According to NEC 210.52(G), at least ____ receptacle(s) must be installed in an attached residential garage.
one
When an existing dryer or electric range is replaced, the NEC ____ the grounded conductor of an existing individual branch circuit to be used for grounding the appliance frame.
permits
Two popular types of electronic dimmers are ____.
slide and rotate
The sound level rating used to define fan noise is expressed in ____.
sones
In many cases, the use of a multiwire branch circuit can save money in that one 3-wire branch circuit will do the job of ____ branch circuits.
two 2-wire
Countertop receptacles must be served by at least ____-ampere small appliance circuits
two 20
The 125-volt, 20-ampere receptacles installed to serve kitchen countertops are required to have GFCI protection ____.
under all circumstances
The maximum overcurrent protection for ____ AWG copper conductors is 30 amperes.
10
Portable lighting track must meet which of the following requirements?
All of the above
The recommended approach to provide adequate lighting in a residential garage is to install one ____-watt lamp on the ceiling above each side of an automobile.
100
Roughing-in recessed luminaires that will be installed between ceiling joists can be quite a challenge. The conflict is between the ____ in. on center joists and the 24 in. square acoustic ceiling panels and their metal "T" bars and supports
16
Prior to the 1996 NEC, ____ receptacles and cords were permitted. However, now it is mandatory that a separate equipment grounding conductor be installed to ground the frames of electric clothes dryers and electric ranges.
3-wire
Some inspectors consider the area within a ____-degree angle from a roof line or overhang to be a damp location.
45
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 feet
The NEC fill calculations for a conduit nipple not over 24 in. (600 mm) allows what fill percentage for three or more conductors?
60%
The most common type of dimmer used in residential applications is rated ____ watts, 125 VAC, 60 hertz.
600
Cord-and-plug-connected appliances shall not exceed ____ percent of the branch-circuit rating.
80
The derating factor that must be used when four to six current-carrying conductors are installed in a conduit is ____ percent.
80
When outdoor receptacles are installed where a cord will be plugged in permanently, such as for decorative lighting, the box cover ____ maintain weatherproof integrity when the cord is plugged in.
a. must
When a nonmetallic wiring method is installed where short sections of metal raceway are provided for mechanical protection—or for appearance—these short sections of raceway ____ be grounded.
a. need not
All 15- and 20-ampere receptacles installed within 6 ft (1.8 m) of a ____ sink must be GFCI protected.
all of the above
GFCI protection can be provided for convenience receptacles serving kitchen countertop areas by ____.
all of the above
Lighting track in residential installations must not be installed ____.
all of the above
When using nonmetallic boxes, the volume allowance is based on ____.
all of the above
Lighting fixtures marked "Recessed Fluorescent Luminaire" ____ permitted to be installed in a suspended ceiling.
are
Outdoor lighting fixtures and associated equipment ____ permitted to be supported by trees.
are
Raceways ____ required be installed as a complete system between pull points before pulling in the wires.
are
According to NEC 406.9, receptacles ____ permitted to be installed in bathtub and shower spaces.
are not
NEC 210.70(A)(3) addresses ____ that are used for storage and attics that contain equipment that might need servicing, such as air-conditioning equipment.
attics
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.
b. 24
Overhead conductors ____ permitted to be supported by trees.
b. are not
Because of the dangers associated with the open neutral (grounded conductor), NEC 300.13(B) does not permit the continuity of the ____ conductor to depend on a receptacle.
b. grounded (neutral)
Some portable appliances use double insulation in place of grounding to provide shock protection to users. Double-insulated appliances normally have ____ power cords and attachment plug caps.
b. two-wire
As defined in Article 100, a bathroom is required to have a ____.
basin
Many workshop fluorescent luminaires are furnished with a 3-wire (____) flexible cord suitable for the purpose that has the attachment plug cap factory-attached to the cord.
black, white, green
Receptacles installed within 6 feet of a wet bar are required ____.
both a and b
To ensure that the conductor insulation will not be injured, be sure to ream the cut ends of rigid conduit and electrical metallic tubing to remove ____.
both a and c
Most duplex receptacles can be changed into "split-wired" receptacles by ____.
breaking off the small metal tab on the terminals
Electric washer/dryer combinations generally require a ____-ampere branch circuit similar to that required for a typical electric clothes dryer.
c. 30
A fixture whip is ____ ft (1.2 to 1.8 m) long and is installed between the junction box and the luminaire.
c. 4 to 6
What piece of kitchen equipment is permitted to be connected to the two 20-ampere small-appliance circuits required for the kitchen and dining room area?
clock outlet
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.
d. 3 ft (900 mm); 8 ft (2.5 m)
When someone decides to use a bedroom as a home office instead, ____.
d. a lot of electronic equipment will have to be plugged in
The advantage(s) of pull-chain switches for lighting fixtures include ____.
d. both a and b
Which of the following is required in order to dim fluorescent fixtures?
d. both a and b
Lighting fixtures intended for installation in wet locations must be ____.
d. marked "Suitable for Wet Locations"
NEC 410.10(D) ____ lighting track to be located within a zone measured 3 ft (900 mm) horizontally and 8 ft (2.5 m) vertically from the top of a bathtub rim or top of a shower stall threshold.
does not permit
With ____ products, it takes two failures to create a shock hazard to the user.
double-insulated
A(n) ____ is NOT an acceptable disconnecting means for appliances.
horsepower-rated switch
Electronic dimmers use triacs to chop the ac sine wave, so some incandescent lamps might ____ because the lamp filament vibrates
hum
NEC 422.16(B)(4) permits a range hood to be cord-and-plug connected. The receptacle would be installed ____ the range.
inside the cabinetry above
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
The branch circuit feeding the required laundry receptacle ____ permitted to supply other dedicated equipment in the laundry room, including lighting and an exhaust fan.
is not
Lighting track in residential installations shall not be cut to length in the field unless permitted by the ____.
manufacturer
Recessed or surface-mounted luminaires and recessed exhaust fans ____ be located within the restricted zone near the bathtub.
may
When designing a home office, you could consider roughing in more wall receptacles than the NEC ____.
minimum
The NEC defines a kitchen as an area with a sink and ____ provisions for food preparation and cooking.
permanent
Some additional rules apply when nonmetallic-sheathed cable and armored cable are ____, because of possible physical damage to the cables.
run exposed
The NEC requires that all 125-volt, ____, 15- or 20-ampere receptacles installed in unfinished basements must be GFCI protected.
single-phase
To provide shock protection, low-voltage wiring systems are required by Article 411 to be ____.
supplied through isolating transformers
In a home office, the current draw is ____.
very low
A location exposed to the weather is a ____ location.
wet
Install luminaires listed for ____ locations if they will be subject to shower spray.
wet
