Chapter 19 and 20

HACR

A 240 volt electric water heater branch circuit will require a ________ circuit breaker.

Month

A GFCI circuit breaker should be tested at least once a month.

SWD or HID

A circuit breaker used to switch fluorescent lighting must be listed and have ______ marked on it.

Open circtuit

A circuit that is energized but does not allow useful current to flow on the circuit because of a break in the current path.

Arc Fault Circuit Interrupter (AFCI) circuit breaker

A device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected.

Overcurrent protection device (OCPD)

A fuse or circuit breaker used to protect an electrical circuit from an overload, a short circuit, or a ground fault.

Type S plug fuse

A fuse type that uses different fuse bases for each fuse size; an adapter that matches each Type S fuse size is required; this fuse type is not interchangeable with other Type S fuse sizes.

Edison-base plug fuse

A fuse type that uses the same standard screw base as an ordinary light bulb; different fuse sizes are interchangeable with each other; this fuse type may only be used as a replacement for an existing Edison-base plug fuse.

Stab

A term used to identify the location on a loadcenter's ungrounded bus bar where a circuit breaker is snapped on.

Service call

A trip made by and electrician to check out, troubleshoot, and fix and electrical problem that a home owner may have.

Circuit tracer

A type of tester that is used to determine which circuit breaker in an electrical panel protects a specific circuit; used when a circuit directory does not properly indicate what is protected by a specific breaker.

Type S

A(n) ______ fuse uses different fuse bases for each size fuse and an adapter that matches each fuse size is required.

Cartridge

A(n) ______fuse is enclosed in an insulating tube that confirms the arc when the fuse blows and is available in either a ferrule or blade style.

False

According to the NEC, lighting fixtures must be installed in clothes closets.

AFCI

All branch circuits supplying 125 volt, 15 and 20 amp outlets in residential kitchens, bedrooms, family rooms, living rooms, libraries, recreation rooms, closets, hallways, parlors, laundry areas, and sun rooms must be protected by an ____.

125

All plug fuses are limited to circuits where the voltage between conductors does not exceed ____ volts. (General rule).

Buried box

An electrical box that has been covered over with sheetrock or some other building material.

Ground fault

An unintended low-resistance path in an electrical circuit through which some current flows to ground using a pathway other than the intended pathway; it results when an ungrounded "hot" conductor unintentionally touches a grounded surface or grounded conductor.

Two

At least ____ 20Amp small-appliance branch circuit (SABC) is/are required to serve kitchen countertop surfaces.

Higher

Because all of the ampacities listed in table 310.10(b)(16) do not correspond with a standard fuse or circuit breaker size, the NEC allows the next _____ standard overcurrent device to be used up to 800 amps.

0-15A Edison-base type, 15A Type S

Explain what a hexagonal configuration on a plug fuse indicates.

5000

For circuit breakers, if the interrupting rating is different than _____ amperes, it must be marked on the breaker.

Type S

Fuseholders for current-limiting fuses cannot permit the insertion of fuses that are not ____.

Explode like a bomb

Fuses and circuit breakers that are subject to fault currents that exceed their interrupting ratings may ___.

Finished basements

GFCI protection is not required for 125volt, 15 or 20 amp receptacles located in ____.

Type S

If an electrician chooses to use plug fuses in a new electrical installation, they must be ____ -plug fuses.

20

In residential wiring, a branch circuit wired with 12 AWG copper conductor is protected by a ______ -ampere or lower fuse or circuit breaker.

240

NEC Article _____ provides many installation requirements for overcurrent protection devices.

300.5

NEC table _____ contains the requirements for direct burial of conductors and raceways.

310.15 (b) (16)

NEC table _____ lists the ampacity of conductors used in residential wiring.

True

Overcurrent protection devices must be readily accessible (general rule).

Type IC

Recessed lighting fixtures installed in insulated ceilings so that the insulation is covering the fixture must be labeled _____.

Stabs

The circuit breakers are attached to the bus bar by contacts in the breakers commonly called ____.

Purple

The color coding for a 15-amp Type S plug fuse adapter is ______.

Green

The color coding for a 30-amp Type S plug fuse is ____.

Interrupting rating

The highest current at rated voltage that a device is intended to interrupt under standard test conditions.

Interrupting

The highest currrent at rated voltage that a device is intended to interrupt under standard test conditions is called the ______ rating.

10

The house electrical system may be grounded using a metal water pipe in direct contact with the earth for at least ____ feet.

100

The minimum size of the service entrance disconnect for a single-family dwelling unit permitted by the NEC is ____ amperes.

Checkout

The process of determining if all parts of a recently installed electrical system are functioning properly

Troubleshooting

The process of determining the cause of a malfunctioning part of a residential electrical system.

Fuse or circuit breaker

The rating of the _____ determines the rating of a branch or feeder circuit.

No more than 6.5 feet above final grade

The required 15 or 20 amp, 125 volt outdoor receptacles must be installed _____.

6"

Type NM cable must be secured no more than ____ inches from each single gang nonmetallic device box.

0-15, 16-20, 21-30

Type S fuses are classified at ________ amperes.

1 1/4

When holes are bored through wood framing members, they must be at least _____ inches from the nearest edge of the wood member.

1/2

When installing an ungrounded conductor in a circuit breaker, approximately ____ inches of insulation is stripped from the end of the conductor.

True

When replacing fuses, never use a fuse that has a lower interrupting rating than the one that is being replaced.

Polarity

When the white grounded circuit conductor is connected to the silver screw on a receptacle and the "hot" ungrounded conductor is connected to the brass screw on the receptacle, you have proper receptacle ____.

Receptacle polarity

When the white-colored grounded conductor is attached to the silver screw of the receptacle and the "hot" ungrounded circuit conductor is attached to the brass screw on the receptacle; this results in having the long slot always being the grounded slot and the short slot always being the ungrounded slot on 125-volt, 15 or 20 amp receptacles used in residential wiring.

Overload

Which of the following will not cause an overcurrent condition?

Cartridge fuse

a fuse enclosed in an insulating tube that confines the arc when the fuse blows; this fuse may be either ferrule or a blade type.

Short circuit

an unintended low-resistance path through which current flows around rather than along a circuit's intended current path; it results when two circuit conductors come in contact with each other unintentionally.