Construction wiring test 2

A 4-way switch does not have "ON" and "OFF" markings. Four-way switches are connected to the __________ between two 3-way switches. One 3-way switch is fed by the _________: the other 3-way switch is connected to the load.

travelers, source

The smallest wire size for which overcurrent protection is specified in the Code is

14 AWG

Nonmetallic-sheathed cable is manufactured with copper conductors ranging in size from ________ AWG to _______ AWG and with aluminum or copper-clad aluminum conductors ranging in size _______ AWG to ________ AWG.

14 to 2, 12 to 2

Alternating current, general-use snap switches are UL-listed to control motors rated up to _____ horsepower.

2

When fire stopping material is used where more than ______ nonmetallic sheathed cables pass through wood framing members, their ampacities must be adjusted, according to 310.15(B)(3)(a)

2

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

Lengths of flexible metal conduit longer than _______ feet are not acceptable as an equipment grounding conductor. In such cases a separate bonding jumper is required to run outside of the flexible conduit to maintain the continuity of the grounding path.

6

A dual-rated conductor marked THHN/THWN is rated _______ when used in dry locations

90 C(194 F)

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

90 C(194 F)

Connectors marked _____are suitable for use with aluminum, copper, or copper-clad conductors. Connectors not so marked are for use with copper conductors only.

AL/CU

GFCI protection is not required for ____.

a built in dishwasher

The NEC specifies that 60C ampacity be used for circuits rated 100 amperes or less, except when the equipment terminals are marked for use with higher temperature wire. What is one potential problem with using higher-temperature, higher ampacity wire?

a higher temperature rating can equal smaller ampacity rating

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

all circuit conductors be run in the same raceway

Low voltage (high voltage drop) in a home can be caused by ________ a. a conductor that is to small for the load b. a circuit that is too long c. poor connections at the terminals d. all of these

all of these

The grounded (identified) conductor of 6 AWG or smaller must have an outer finish that is _______ a.white b.gray c.three continuous white stripes d.any of the above

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

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

are not

Liquidtight flexible nonmetallic conduit is subject to which of the following limitations? a. cannot be used in direct sunlight, unless marked for this application b.can become brittle in extremely cold temperatures c. both of these

both of these

GFCI protection is for which of the following? a. outdoor receptacles installed at eaves for snow melting equipment b.a kitchen receptacle installed inside a cabinet to supply a microwave oven c. a receptacle installed within 6 feet of a wet-bar sink d. a receptacle installed for a kitchen clock

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

For given conductor size, which material has the greatest ampacity?

copper

Table 310.15(B)(2)(a) gives allowable ampacities of copper conductors with various types of insulation. When conductors will be used in ambient temperatures exceeding 30 C(86 F), the ______ for the table must be applied.

correction factors

Type NM cable can be run in all of the following locations, except for

damp and moist locations and exterior masonry block or tile walls

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

Explain what flexible metallic and nonetallic conduits are typically used for in residential construction.

easier installation

When using individual conductors in raceway, all of the following colors of insulation are permitted for the grounded conductor (neutral), except for _______

green with three white strips

When type NM cable is run through holes in metal framing members, _________ must be provided to protect the cable from sharp metal edges

grommet

The long slot on a 15-ampere, 125-volt, receptacle is the _______ conductor

grounded

"T"-rated snap switches are intended for what application?

incandescent lighting (switches for lighting purposes)

Type AC cable is manufactured with ________ phase conductors.

two three and four

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

two-wire nongrounding-type receptacle

If the 1-1/4 in. (32mm) distance from the edge of the black hole to the edge of the framing member cannot be maintained, what thickness of steel plate must be used to protect the cable?

1/16 inch (1.6mm)

The NEC recommends voltage drop no greater than _______ perent for feeders and no greater than _______ percent total for feeders and branch circuits together.

3 & 5

A GFCI for personal protection operates when it senses a current imbalance between _______ mA and _________ mA

4 & 6

Class A GFCI devices trip (open) when a ground-fault in the range of ______ milliamperes occurs.

4 to 6

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

60 C (140 F)

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

What would happen if fire and smoke alarms were connected to a circuit that is protected by a GFCI breaker?

Nuisance tripping

Although the National Electric Code contains requirements for making holes and notches in framing members, in order to protect the cables installed in them, electricians must also be aware that _________ also have requirements for holes and notches in framing members, in order to not weaken the structure of the building.

building codes

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

AFCI protection is required for all outlets in

living rooms

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

The rating of a branch circuit is determined by its ____.

overcurrent protective device (fuse or circuit breaker)

Explain why particular care has to be taken when making aluminum wiring connections.

put a oxidizing agent on the wire itself, makes connections a lot better

When receptacle or switches have No. 6-32 screws secured to them with small pieces of cardboard, these pieces of cardboard must be _______ when the wiring device is installed in a metal outlet box.

removed

When a conductor that is carrying current breaks or when a loose connection occurs, it is a _________ arcing fault because the current is trying to travel in its intended path

series

When terminating a receptacle, the white (grounded) conductor is always connected to the _________-colored terminal, and the phase (hot) conductor is always connected to the ________-colored terminal

silver, gold

Name at least four kinds of light switches

single-pole, three way, four way, dimmer switch

The common point on a wye-connected polyphase system or the mid-point on a single-phase system is the __________

star or neutral point

The NEC requires that conductors 8 AWG and larger must be _______ when installed

stranded

The National Electrical Code allows rigid PVC conduit to do all of the following except for ________

support lighting fixtures

The conductors that run between a switched outlet and the switch controlling the outlet are called a(n)

switch loop

All 125-volt, 15- and 20-ampere receptacles installed to serve a kitchen countertop are required to be ____.

tamper resistant