Ch 2 - Hardware & Materials

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

length of white wire attached to it

A GFCI circuit breaker is easily recognizable by the 'push-to-test' button and the __________.

fuse

A ________________ is an overcurrent device that opens a circuit when a fusible link is melted away by the extreme heat caused by an overcurrent.

ON/OFF

A double-pole switch has _____ marked on the switch handle?

short

A low resistance path, which results in a high value of current that flows around, rather than through, a circuit is called a(n) __________ circuit.

knockout

A part of an electrical box that is designed to be removed so that a cable or raceway can be connected to the box is called a __________.

120, 240

A single-pole breaker is used on a circuit voltage of ___________ volts and a two-pole breaker is used on a circuit voltage of ___________ volts in residential wiring.

double-pole

A switch that is used on 240-volt circuits to control a load from one location is called a __________ switch.

outlet

A(n) _____________ is a point on the wiring system at which current is taken to supply equipment.

junction

All _______ boxes must be accessible after they are installed.

ground fault

An accidental connection of a "hot"conductor and a grounded piece of equipment or the grounded conductor is called a(n) __________.

copper copper-clad aluminum aluminum

CO/ALR marked on a receptacle indicates that __________ conductors may be terminated to it.

BX

Electricians often refer to Type AC cable as ____________________ cable.

copper

If a switching device has the marking CU ONLY on it, an electrician can use __________ wire with the device.

armored-clad metal-clad cable

In certain locations in the United States, the AHJ may not allow nonmetallic sheathed cable in residential construction. The alternative wiring method most often used is _____________.

20

In residential wiring, the NEC requires a __________-amp circuit breaker or fuse to be used with 12 AWG copper conductors.

authority having jurisdiction

It is the __________ who has the job of approving the electrical materials used for a residential electrical installation.

nonmetallic sheathed cable

Manufacturers of _____ are now color-coding their cables, which allows for ready identification of the cable size.

GFCI

On a _____ receptacle, the incoming power is connected to the line terminals

silver

On a duplex receptacle, the _____ screw is used to terminate the white grounded conductor.

nonmetallic sheathed cable

Romex is a trade name used by electricians to refer to __________.

tamper-resistant

Starting with the 2008 National Electrical Code and continuing in the 2011 edition almost all 15- or 20-amp, 125-volt receptacles in a house must be __________.

3, 10

The NEC requires rigid metal conduit to be supported within __________ feet of each box and then no more than every __________ feet thereafter. (general rule)

8

The National Electrical Code requires Type NM cable to be supported no more than __________ inches from single-gang nonmetallic device boxes.

attachment plug

The ______ is the device that is inserted into a receptacle to establish a connection between the conductors of the attached flexible cord and the conductors connected to the receptacle.

ampacity

The ________ of a conductor refers to its ability to carry current.

white

The __________ circuit conductor is used as the grounded conductor and returns current from the load back to the source.

American Wire Gauge

The __________ is a scale of specified diameters and cross sections for wire sizing and is the standard wire sizing scale for the United States.

National Electrical Manufacturers Association

The __________ is an organization that develops electrical equipment standards that all member groups follow when designing and producing electrical equipment.

brass

The ungrounded 'hot' conductor is terminated to the __________ terminal on a duplex receptacle.

UF

Type __________ cable is used for underground installations of branch and feeder circuits.

USE

Type __________ cable is used for underground service entrance installations.

12

When nonmetallic device boxes that are 2-gang or more are used, the installed Type NM cable must be supported no more than __________ inches from the box.

ganging

When two or more electrical device boxes are joined together for the purpose of holding more than one device it is called __________.

a larger

When using aluminum conductors, __________ size conductor must be used to carry the same amount of current as a copper conductor.

8 AWG

Which of the following conductors is the largest? 8 AWG; 10 AWG; 12 AWG; or 14 AWG

circuit breakers

__________ are the most often used type of overcurrent protection device used in residential wiring.

Type S

__________ plug fuses are considered non-tamperable and are used in new installations requiring plug fuses.

combination

_______________ devices are used when more than one device is needed at one location.

torque

____________________ is a measure of how much a fastener is being tightened and is measured in foot-pounds or inch-pounds.

edison base

_______________________ plug fuses cannot be used in new installations.


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