Conductors and cables Chapter 5

Approximately _______ of insulation is stripped off the conductors to be terminated when making crimped connections.

1/2" to 3/4"

Armored cable with two, three, or four aluminum conductors is available in AWG sizes 1 - ________.

12 AWG

And insulation resistance test is performed by applying ________ volts or more between the conductor and ground.

500

An _______ AWG conductor is bigger than a 12 AWG conductor.

6

Twist on wire connectors are commonly used to connect wire with AWG sizes ________.

8 through 22

Conductor ________ is a measure of current carrying capacity.

Ampacity

An ______ is a plastic or heavy cardboard device used to protect the conductors in armored cable

Anti-short bushing

An _______ Cable is a fabricated assembly of insulated conductors in a flexible metal enclosure.

Armored

An _______ is a tube or pipe used to support and protect electrical conductors.

Conduit

An _______ is a test instrument that test for a complete path for current to flow.

Continuity tester

The material with the best conductive properties is ________.

Copper (Cu)

The most widely use type of conductor material is ________.

Copper (Cu)

An _______ conductor is covered with the material that is not recognized by the NEC

Covered

_________ connections are the most common terminations in commercial and industrial applications.

Crimped

When possible, conductor should be fed ________.

Downward

An _______ is used to connect non-current carrion metal parts of equipment or enclosures to the system grounding conductor or grounding electrode

EGC

A bad fuse can have continuity?

False

A conductor shield is a non-metallic material applied over insulated conductors to confined electrical field to the insulation?

False

Aluminum has better conductive properties than copper?

False

An increase in resistance or current flow results and less voltage drop?

False

An insulation shield is a non-magnetic material are used to cut out dielectric stress around the conductor?

False

An insulator is in material with low resistance?

False

Continuity tester only operate with circuits that have a very low resistance typically 100 ohms or lower?

False

Service entrance cable to require the use of special tools for installation?

False

The NEC recommends that there be no more than a 5% voltage drop on a branch circuit feeder?

False

Underground service entrance cable is restricted to maximum length of 8 inches after enters a building?

False

When properly installed, and anti-short bushing should not be visible

False

A _______ splice connects to conductors and which one of the conductors is smaller than the other or one conductor stranded in the other is solid.

Fixture

Most installers use a ________ to cut armored cable

Hacksaw

Insulation resistance test can be performed with a _______ or Megohmmeter.

Insulation multi meters (IMMs)

An ________ tester is a test instrument that measures current that leaks through the insulation into ground.

Insulation resistance

An _________ Cable can be a single conductor a multi conductor and is rated from 0 V to 600 V

Low voltage

An ________ can be applied to conductors to help route them through lengths of conduit with several bends

Lubricant

In addition to non-flexible metallic raceways, type _______ cable is required by the NEC for installation of emergency power circuits.

MI

_______ cables have conductors insulated with highly compressed magnetism oxide enclosed in a smooth copper sheath

MI

________ Cable must be used in concealed locations such as embedded in a plaster finish or in air voids in a Masonary block.

Mineral insulated

Resistance is measured in ________.

Ohms (Ω)

Fish tape is supplied ________ in lengths of 50 foot, 100 foot, 200 foot

On a reel

_______ connections are used for making Straight, tap, or terminal connections

Pressure

An _______ is an enclosed channel for routing in place in electrical conductors and cables

Raceway

An ______ is a location for the entry of utilities into a structure

Service entrance

An ________ Cable is a multi conductor electrical assembly with or without an overall covering.

Service entrance

An _______ is any service to a structure that is achieved by burying the conductors underground.

Service lateral

An _______ connection joins conductors without using heat to make a strong electrical and mechanical connection.

Solderless

________ conductors is performed by attaching one conductor to the fish tape and the other attaching the second conductor a short distance behind the first connection

Staggering

_______ Cable has 2 to 4 conductors and is used in well Casings.

Submersible

Type ______ insulation can be installed in both wet and dry locations.

THWN

A ______ is an electricity conducting connection of a circuit or equipment used for the connection of an external conductor.

Terminal

An ______ screw completes the connection between the current current conductor and the component or device that it must be connected to.

Terminal

The NEC provides ampacity adjustment factors for single raceways containing more than _______ current carrying conductors.

Three

Cables and conductor should be tested and maintained on a _______ testing cycle at minimum

Three-year

A ________ is a cable that consist of two or more insulated conductors enclosed in a flame redundant, nonmetallic jacket and is used for installation and cable trays or raceways.

Tray cable (TC)

A medium voltage cable can be a single conductor or multi conductor and is rated from 2001 V to 35,000 V?

True

A messenger wire is a separate why are used to support insulated conductors or cables?

True

Fish tapes can be coded with nylon to increase durability and make pulling conductors to conduit easier ?

True

High resistance connections result from improper connections between conductors?

True

It is not recommended to twist conductors together prior to inserting them into a wire nut?

True

Low-voltage cables can be installed as part of a messenger system in outdoor locations

True

Metal clad cable does not have a bonding conductor running throughout its length?

True

Mineral insulated cables are rated at 600 V

True

Per the NEC, anti-short bushings are recommended but not required for MC cable installations?

True

Per the NEC, conductors must be aluminum, copper clad aluminum, or copper unless otherwise specified?

True

The main advantage of using and continuity test mode of a a test instrument is that the audible response is sometimes more desirable than reading a resistance measurement?

True

Type UF cable can also be used for the same applications as an NM cable?

True

When energize parts of an electrical circuit are exposed, such as working doctors are terminated at a fuse or circuit breaker panels, the distance, or airgap, is used as the insulator?

True

When performing a continuity test, the conductor that has a 0.0 ohms reading on the display of the continuity tester is the grounded conductor?

True

A ______ is a solder less plastic connector that uses a tapered metal coil spring to twist conductor cables together

Twist on wire connector

The selection and sizing of a conductor is affected by _____.

Voltage drop

A _______ splice is an electrical connection used where a connection must be strong enough to support long lengths of heavy conductors

Western union

An _____ is a self adhesive label affixed to a conductor prior to the point where insulation is stripped and provides a unique numeric or alphameric identifier for that specific conductor.

Wire marker