Chapter 8 EO test

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

1,920

What is the NEC definition of a clothes closet?

A clothes closet is defined by the NEC as a nonhabitable room or space intended primarily for storage of garments and apparel.

A(n) ____________________ is used only to ground the metal box and must never be used as a current-carrying conductor.

Equipment grounding conductor

An outside weatherproof outlet is required to have ____________________ protection.

GFCI

Explain why the required minimum clearances for fluorescent fixtures installed in closets are smaller than those for incandescent fixtures.

Incandescent fixtures develop higher surface temperatures than fluorescent fixtures and therefore represent a greater fire danger in closets filled with flammable goods.

Explain why pigtails used to connect receptacles to branch-circuit wiring need not be counted when determining the correct outlet box size.

NEC 314.16(B)(1) states that a "conductor, no part of which leaves the box, shall not be counted" when calculating box size.

What Code section provides very specific rules for the location and types of luminaires permitted to be installed in clothes closets?

NEC 410.16 provides rules for this issue.

What is wall washing?

The term wall washing is used when luminaires are installed in a row, parallel to the wall that is to be "washed" with light.

What kind of receptacle outlet has a top portion that is "hot" at all times and a bottom portion that is controlled by the wall switch?

This is a split-wired or half-switched receptacle.

Calculate the volt-amperes and watts of a 120-volt, 10-ampere motor at 50 percent power factor.

V × A = 120 × 10 = 1,200 volt-amperes V × A × PF = 120 × 10 × 0.5 = 600 watts

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?

all of these

Electric baseboard heaters may not be permitted to be installed ____________________ a receptacle outlet.

beneath

Which switch type is rarely used in residential wiring?

double-pole

To be effective, accent lighting should be at least ____ times that of the surrounding general lighting.

five

When using nonmetallic boxes, the equipment grounding conductor in nonmetallic-sheathed cable is connected to the ____-shaped equipment grounding screw found on all switches and receptacles.

green hexagon

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

grounding

Which rule of thumb can be followed when planning branch circuits for dwelling units?

load circuits to no more than 80% of their rating

How many lighting outlets are permitted on one branch circuit?

no limit

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

NEC 210.11(B) requires that load be evenly proportioned among the different circuits in a panelboard. This is normally performed at the load center panelboard by connecting branch-circuit wiring so that the connected load on the two ____________________ is as equal as possible.

phases

A light above a workbench is an example of ____.

task lighting

The NEC allows what maximum number of receptacle outlets to be connected on a 120-volt residential lighting or small-appliance branch circuit?

unlimited