Wiring methods

Where noncombustible surface material is used on walls or ceilings, outlet boxes must be mounted so that they will be set back not more than ____ from the face of the surface material.

1/4 in. (6 mm)

For continuous loads, the branch-circuit rating, the conductors, and the overcurrent device shall not be less than ____ percent of the rating of the equipment.

125

The NEC in Table 210.24 shows that the minimum conductor size for branchcircuit wiring is

14awg

The maximum volt-ampere loading permitted on a 20-ampere branch circuit with a continuous load is ____ watts (volt-amperes).

1920

Receptacle outlets must be installed in any wall space ____ or more in width.

24inch 600mm

The minimum lighting load requirement for dwelling units is ____ volt-amperes per square ft (0.093 m3).

3

Class A GFCI devices may or may not trip (open) when a ground-fault in the range of

4 to 6

The total rating of utilization equipment fastened in place, other than luminaires (lighting fixtures), shall not exceed ____ percent of the branch-circuit ampere rating, where lighting units, cord and plug connected utilization equipment not fastened in place, or both, are also supplied.

50

Wall receptacles in a habitable room must be placed so they are no further than ____ feet from any point along the wall.

6

Fixture whips used with fixtures in suspended ceilings are permitted to be of various types of cables or conductors in flexible raceways. Regardless of the wiring method used, fixture whips are permitted to be a maximum of ____ long between outlet box and fixture.

6 feet

LEDs have a life expectancy of ____ hours.

60,000-100,000

The ampacity of Type NM cable shall be in accordance with ____ conductor temperature rating.

60°C (140°F

The outlet box or outlet box system of a ceiling-suspended fans must not support more than ____ pounds must.

70

A continuous load shall not exceed ____ percent of the rating of the branch circuit.

80

Connectors marked ____ are suitable for use with aluminum, copper, or copper-clad conductors.

AL/CU

In which location(s) is Type NM cable NOT allowed to be run?

Both b and c

What determines the rating of a branch circuit?

Branch-circuit wire size

The National Electrical Code requires outdoor receptacles to be ____.

GFCI protected

When an existing two-wire, nongrounding-type receptacle is replaced in a location where the Code requires a GFCI receptacle, it is permitted to be replaced by a ____.

GFCI receptacle

According to ____, unused knockouts and other openings in electrical boxes and cabinets are required to be closed.

NEC 110.12(A)

For safety, it is very important that electrical equipment be "listed" by the ____.

NRTL

Type ____ is the most common building wire used today.

THHN/THWN

Device faceplates must be mounted so as to ____.

a and b

GFCI protection is required for which of the following?

a receptacle installed within 6 feet of a wet-bar sink

Residential wiring plans generally show lighting and receptacle outlet locations but not circuits. The electrician should design the installation with which of the following in mind?

a. economy - minimizing the number and length of circuits

As defined in Article 100, a dwelling unit has the following feature(s):

a. permanent provisions for living, sleeping, cooking, and sanitation

The meaning of approved is ____.

acceptable to the authority having jurisdiction

To avoid inductive heating in metallic raceways, the NEC requires that ____.

all circuit conductors be run in the same raceway

Information about what types of lighting fixtures are suitable for which types of installations can be found in the ____.

all of the above

Electrical wall boxes should not be mounted back-to-back in walls because ____.

all of these

NEC 406.3(D)(3) permits existing two-wire, nongrounded-type receptacles to be replaced with a ____ where no equipment grounding conductor exists.

all of these

The grounded (identified) conductor of 6 AWG or smaller must have an outer finish that is ____.

any of the above

Under certain circumstances, the grounded (neutral) conductors of a residential service ____ permitted to be sized smaller than the phase conductors.

are

Sliding glass panels ____ considered to be wall space, the same as any other interior or exterior door.

are not

Phase conductors 6 AWG and smaller ____ permitted to be re-identified as equipment ground conductors using green paint, tape, or other effective means.

b. are not

When using individual conductors in raceway, which insulation color is NOT permitted for the grounded conductor (neutral)?

b. green with three white stripes

The NEC requires that when a suspended ceiling grid is used to support lay-in type lighting fixtures, ____.

both a and b

Overheating of lighting fixtures, which often results in fires, is most often caused by

both a and c

The NEC requires that a(n) ____ be installed at each conductor splice connection point.

box or conduit body

The NEC defines a ____ as "the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)."

branch circuit

GFCI protection is not required for

built in dishwasher

Liquidtight flexible nonmetallic conduit is subject to which of the following limitations

c. both of these

With the exception of ____, the 20-ampere appliance circuits required by NEC are permitted to serve no other loads

clock outlets

A device's primary function is to

control electric energy

Which of the following is NOT included when calculating the usable area of a dwelling to compute the required lighting load?

crawl space

An arc flash can produce temperatures of ____°F.

d. 35,000

The suffix "B" in Type NM-B nonmetallic cable means that the conductors have an insulation temperature rated ____.

d. 90°C (194°F)

Recessed lighting fixtures constructed for installation in thermal insulation are rated as ____.

d. Type IC

A single receptacle for one appliance or a duplex receptacle for two appliances that are located within dedicated space for each appliance that in normal use is not easily moved from one place to another and that is cord-and-plug connected ____ require tamper-resistant receptacles

do not

Which switch type is rarely used in residential wiring?

double-pole

In order that the connections inside an outlet box remain accessible, the NEC requires that a surface extension from an outlet box cover be made using ____.

flexible conduit

Which of the following lamp types generally performs badly in low temperatures?

fluorescent

Receptacles installed on 15- and 20-ampere branch circuits must be of the ____ type.

grounding

On isolated ground receptacles, the metal yoke ____ integrally bonded to the equipment grounding terminal of the receptacle.

is not

When a 4 ft. piece of nonmetallic-sheathed cable is used as a fixture whip above an accessible ceiling, it ____.

is not required to be secured

Conductor sizes up through 4/0 AWG are expressed in American Wire Gauge (AWG). Conductor sizes larger than 4/0 AWG are expressed in ____.

kcmil

Older electrical books and plans sometimes use the term "MCM," which means the same thing as ____.

kcmil

When installing a ceiling paddle fan, the outlet box must be

listed and marked as acceptable for fan support

Snap switches with nonmetallic yokes (straps) have a terminal for the equipment grounding conductor. Using this type of switch provides a means for grounding ____ faceplates when nonmetallic boxes are used.

metal

Branch circuit conductors shall have an ampacity ____ the maximum to be served.

not less than

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

As defined in NEC Article 100, a(n) ____ is a point on the wiring system at which current is taken to supply utilization equipment.

outlet

The rating of a branch circuit is determined by its

overcurrent protective device

The National Electrical Code is a minimum ____ standard.

safety

The architect uses symbols and notations to ____ concerning electrical devices, appliances, and equipment.

simplify the drawing and presentation of information

The general lighting load for a dwelling is based on the ____.

square footage of the dwelling

The NEC requires that conductors 8 AWG and larger must be ____ when installed in a raceway.

stranded

The National Electrical Code does NOT allow rigid PVC conduit to

support lighting fixtures

All 125-volt, 15- and 20-ampere receptacles in a dwelling are required to be ____.

tamper resistant

A light above a workbench is an example of ____.

task lighting

Nationally Recognized Testing Laboratories (NRTL) ____ electrical products to provide a basis for approval by inspectors in the field.

test and list

The NEC requires that switching be done only in ____ conductors.

ungrounded