LESSON 3

Question 1

underground (buried) service entrance conductors.

Answer 1

Service Lateral

Question 2

overhead wires extend from a pole-mounted distribution transformer to the building’s service entrance

Answer 2

Service drop

Question 3

conductors that carry power from the transformer through a metering device .

Answer 3

Service Entrance Conductors

Question 4

it is an industrial facility that houses the prime mover

Answer 4

Power Station

Question 5

it includes the components that connect the utility-supplied wiring to the service disconnect, excluding the utility’s metering equipment.

Answer 5

Service Entrance

Question 6

receives the service entrance conductors

Answer 6

Service Entrance Equipment

Question 7

it is a required part of the service entrance equipment that allows electrical service from the utility company

Answer 7

Service Disconnect

Question 8

a mechanical switching device used to isolate a circuit or an equipment from the supply side.

Answer 8

Disconnect (Safety Power Switch)

Question 9

it is a large cabinet or assembly of metal cabinets in which is connected disconnecting switches, overcorrect protection devices

Answer 9

Switchboard

Question 10

it is one or more metal cabinets that serve as a single unit, including buses, automatic overcurrent protection devices

Answer 10

Panelboard

Question 11

unit of electrical distribution system, which splits the electrical power to various branches or circuits.

Answer 11

Panelboard

Question 12

a broadterm that describes a wide variety of switching devices that all fulfill a common need

Answer 12

Switchgear

Question 13

are used in transmitting and distributing power from the power plant to a substation

Answer 13

Transformers

Question 14

are typically used in buildings to reduce building system voltages to useable levels.

Answer 14

Step-down transformers

Question 15

they safeguard the building service or an individual circuit from excessive current flows

Answer 15

Overcurrent protection (OCP) devices

Question 16

It is an overcurrent protective device with a circuit opening fusible part that is heated and severed by the passage of overcurrent through it.

Answer 16

Fuse

Question 17

is the highest current it can carry continuously without exceeding a specific temperature limit (e.g., without overheating).

Answer 17

Overcurrent Rating

Question 18

it is the current that a fuse is able to interrupt without being destroyed or causing an electric arc with unacceptable duration.

Answer 18

Interrupting Capacity

Question 19

it is a broad category of electrical or electronic machine or instrument designed to perform a specific mechanical, chemical through the use of electrical energy.

Answer 19

Utilization equipment

Question 20

it an end-use piece of utilization equipment designed to perform a specific function

Answer 20

Electric Appliance

Question 21

it is a component in an electrical system that is designed to carry but not use electricity

Answer 21

Electrical Device

Question 22

it is the location in a branch circuit where electricity is used.

Answer 22

Outlet

Question 23

it is a female connecting device with slotted contacts

Answer 23

Receptacle

Question 24

it is a male connecting device that has two or more prongs

Answer 24

Plug

Question 25

it is an electrical component that can break an electrical circuit

Answer 25

Switch

Question 26

used to control a single or group of lamps from one location. The switch has only two terminals.

Answer 26

SPST (single pole single throw) switch

Question 27

used to control a single lamp from two different locations. The switch has three terminals.

Answer 27

SPDT (single pole double throw) or three-way switch

Question 28

used to control a single lamp from three or more different locations. The switch has four terminals.

Answer 28

Four-way switch

Question 29

it is any material that conducts electrical current.

Answer 29

Electrical Conductor

Question 30

it is an electrical conductor (usually copper or aluminum) that serves as a common connection for two or more electrical circuits.

Answer 30

Bus bar

Question 31

contains more than one conductor bundled together in a factory assembly of wires

Answer 31

Cable

Question 32

conductor encased within material of composition or thickness recognized by the PEC as electrical insulation.

Answer 32

Insulated Conductor

Question 33

conductor encased within material of composition or thickness that is not recognized by the PEC as electrical insulation

Answer 33

Covered Conductor

Question 34

a conductor having no covering or electrical insulation whatsoever.

Answer 34

Bare Conductor

Question 35

a stranded conductor or a group of conductors insulated from one another

Answer 35

Cable

Question 36

an enclosed channel for holding wires, cables or busbars.

Answer 36

Raceway

Question 37

- Single insulated conductor of solid or stranded bare annealed high conductivity copper, with thermoplastic lead-free insulation of PVC (Polyvinyl Chloride) and protected by a nylon jacket; normally designed to operate up to 600 V.

Answer 37

Thermoplastic Cables

Question 38

it is the maximum current it can carry continuously without exceeding the temperature limitations of the insulation and sheathing material

Answer 38

Conductor’s Ampacity

Question 39

are electrical boxes and cabinets made of metal

Answer 39

Enclosures

Question 40

are metal and non-metallic (plastic) enclosures that hold devices

Answer 40

Electrical boxes

Question 41

are a special type of electrical box used to enclose conductor connections.

Answer 41

Junction boxes

Question 42

commonly called junctions in the trade.

Answer 42

Connections

Question 43

is a type of junction box that allows access to a raceway for snaking conductors through the raceway.

Answer 43

Pull box

Question 44

is an enclosed channel such as a conduit, tube, or gutter designed for holding wires, cables, or busbars.

Answer 44

Raceway

Question 45

is of a standardized, factory-assembled enclosure consists of outer duct-like housing, bus bars, and insulators.

Answer 45

Busway

Question 46

are metal sheet or nonmetallic, flame-resistant plastic troughs that serve as a housing that encloses and protects conductors

Answer 46

Wire gutters or wireways

Question 47

found in refrigerators, freezers, dishwashers, kitchen sink waste disposal, portable kitchen appliances

Answer 47

Electric Motors