Chapter 5 EO test

In older existing installations, where an equipment ground does not exist in a metal switch box that is located within reach of a conductive floor such as tile or cement, NEC 404.9(B) requires the use of what kind of faceplate?

The NEC requires the used of a nonmetallic faceplate for this situation.

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

grounded

Specify the maximum overcurrent protection permitted for the following the circuit conductor sizes: a. 15 amoeres b. 20 amperes c. 30 amperes 14 AWG copper 12 AWG copper 10 AWG copper

A B C

When is a reidentified white conductor NOT permitted?

A reidentified white conductor is not permitted as the return conductor from the switch to the switched outlet.

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 brass

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

tamper resistant

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

ungrounded

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

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

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

These switches are intented for controlling incandescent lighting, which has a very high momentary inrush current.

Match the following switch types with the correct number of terminals for each. a. Two terminals b. Four terminals c. Three terminals Three-way switch Single-pole switch Four-way switch

C A B

Receptacles have several screw terminals for the attachment of circuit conductors. Match the following screws with their intended conductor. a. Equipment grounding conductor b. Hot (phase) conductor c. Grounded (white) conductor Silver-colored screw Brass-colored screw Green hexagonal screw

C B A

From how many locations does four-way switching allow a lighting outlet to be controlled?

Four-way switching allow a lighting outlet to be controlled from three or more locations.

Name at least four kinds of lighting switches.

Lighting switches include single-pole, 3-way, 4-way, double-pole, dimmer, occupancy sensor, timer, and speed control types, snap (toggle), push, rocker, slider, rotary, electronic, and with or without pilot lights

Screwless push-in terminals (i.e., back wiring holes) on receptacles are listed only for use with what type of branch-circuit conductor?

These terminals are used with solid 14 AWG copper conductors.

Describe what NEC 250.148 requires to maintain the continuity of the equipment grounding path.

When more than one equipment grounding conductor enters a box, they are to be spliced so that the continuity of the grounding path is not interrupted if the receptacle or other wiring device is removed.

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

all circuit conductors be run in the same raceway

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

any of the above

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

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

green with white stripes

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

is not

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

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

neutral point

When receptacles 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

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

switch loop