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EU1 > Building Electrical Materials and Equipment > Flashcards

Building Electrical Materials and Equipment Flashcards

1
Q

 industrial facility that houses the prime mover, electric generator and auxiliaries for conversion of mechanical energy, chemical energy and/or nuclear energy into electrical energy

A

Power Station

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2
Q

 facility or system for the generation of electric power

A

Power Station

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3
Q

 carry power from the transformer through a metering device to the building’s service disconnects
 may be overhead or underground

A

Service Entrance Conductors

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4
Q

 overhead wires extend from a pole-mounted distribution transformer to the building’s service entrance
 Overhead service entrance conductors extending from pole-mounted transformers

A

Service drop

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5
Q

 underground (buried) service entrance conductors.

A

Service Lateral

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6
Q

 includes the components that connect the utility-supplied wiring (the service lateral or service drop) to the service disconnect, excluding the utility’s metering equipment

A

Service Entrance

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7
Q

 receives the service entrance conductors
 The service equipment includes a method of measuring power (metering equipment), a method of cutting off power (main disconnect or switch gear), and overcurrent protection devices (circuit breakers or fuses) that protect the service entrance conductors.

A

Service Entrance Equipment

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8
Q

 required part of the service entrance equipment that allows electrical service from the utility company to be switched off so that power is disconnected to the building installation
 set of fuses or a circuit breaker that protects the service entrance conductors

A

Service Disconnect

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9
Q

 large cabinet or assembly of metal cabinets in which is connected disconnecting switches, overcorrect protection devices (fuses or circuit breakers), other protective devices, and instruments designed to divide large amounts of electrical current into smaller amounts of current used by electrical equipment

A

Switchboard

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10
Q

 one or more metal cabinets that serve as a single unit, including buses, automatic overcurrent protection devices (fuses or circuit breakers)
 equipped with or without switches for the control of light, heat, and power circuits

A

Panelboard

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11
Q

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

A

Transformers

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12
Q

 The operation of a large commercial installation depends on power distribution that, in turn, depends on transformers used to change voltage, current, and phase of electrical power nearby and within a building.

A

Transformers

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13
Q

kVA

A

 Building transformers are rated in

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14
Q

: steps down the voltage applied to it are
: typically used in buildings to reduce building system voltages to useable levels

A

 step-down transformer

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15
Q

steps up the voltage applied to it

A

 step-up transformer

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16
Q

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

A

Overcurrent protection (OCP) devices

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17
Q

 protects the circuit components from severe overheating when current flowing through the circuit reaches an amperage that will cause an excessive or dangerous temperature rise in conductors

A

Overcurrent protection (OCP) devices

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18
Q

 serve as automatic overcurrent protection devices
 designed to open a circuit if the amount of current, in amps, that flows through the circuit exceeds the OCP device rating

A

Fuses and circuit breakers

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19
Q

 device designed to open (or trip) and close a circuit by non-automatic means and to open the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating

A

Circuit Breaker

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20
Q

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

A

Fuse

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21
Q

 enclosed in insulating tube

A

Cartridge Fuse

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22
Q

 enclosed in porcelain or rubber commonly used in various electrical appliances

A

Plug Fuse

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23
Q

 opened wire of low melting point commonly used in the safety power switch

A

Fuse Wire

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24
Q

 holds five times its rating for ¼ to 2 seconds (not ideal to loads which requires more than 2 seconds to accelerate)

A

Non-time delay fuse

25
Q

 holds five times the rating for 10 seconds

A

Dual-element time delay fuse

26
Q

PEC

A

Philippine Electrical Code

26
Q

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

A

Overcurrent Rating

27
Q

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

A

Interrupting Capacity

28
Q

 broad category of electrical or electronic machine or instrument designed to perform a specific mechanical, chemical, heating, or lighting function through the use of electrical energy

A

Utilization equipment

29
Q

 an end-use piece of utilization equipment designed to perform a specific function such as cooking, cleaning, cooling, or heating

A

Electric Appliance

30
Q

 component in an electrical system that is designed to carry but not use electricity
 includes components such as switches, receptacles, and relays

A

Electrical Device

31
Q

 location in a branch circuit where electricity is used
 For example, a lighting outlet is the location in a branch circuit where conductors provide power to a light fixture.

A

Outlet

32
Q

 female connecting device with slotted contacts
 installed at an outlet or on equipment, where it is intended to easily establish an electrical connection with an inserted plug

A

Receptacle

33
Q

 male connecting device that has two or more prongs that are inserted into a receptacle to connect to an electrical circuit

A

Plug

34
Q

an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another

A

Switch

35
Q

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

A

SPST (single pole single throw) switch

36
Q

 used to control a single lamp from two different locations
 has three terminals

A

SPDT (single pole double throw) or three way switch

37
Q

 used to control a single lamp from three or more different locations
 has four terminals

A

Four-way switch

38
Q

 mechanical switching device used to isolate a circuit or an equipment from the supply side
 could either be fused or non-fuse type

A

Disconnect (Safety Power Switch)

39
Q

 any material that conducts electrical current
 either solid or stranded

A

Electrical Conductor

40
Q

are a single solid length of conductor called a wire.

A

Solid conductors

41
Q

consist of smaller wire strands.

A

Stranded conductors

42
Q

 an electrical conductor (usually copper or aluminum) that serves as a common connection for two or more electrical circuits
 typically solid bars used for power distribution
 commonly found in panelboards, switchboards, and other power distribution equipment
 either flat strips or hollow tubes

A

Bus bar

43
Q

 contains more than one conductor bundled together in a factory assembly of wires
 an outer sheathing encases and protects the conductors, simplifying installation of multiple wiring

A

Cable

44
Q

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

A

Insulated Conductor

45
Q

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

A

Covered Conductor

46
Q

 conductor having no covering or electrical insulation whatsoever

A

Bare Conductor

47
Q

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

A

Cable

48
Q

 enclosed channel for holding wires, cables or busbars

A

Raceway

49
Q

 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

A

Thermoplastic Cables

50
Q

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

A

Conductor’s Ampacity

51
Q

 electrical boxes and cabinets made of metal (e.g., steel, galvanized steel, aluminum, and so on) or nonmetallic (plastic) materials that provide protection for conductors, connections, controls, and other electrical equipment

A

Enclosures

52
Q

 metal and non-metallic (plastic) enclosures that hold devices such as switches or outlets and safely permit wiring connections
 Boxes are available in four primary shapes: square, rectangular, octagonal, or round.

A

Electrical boxes

53
Q

 special type of electrical box used to enclose conductor connections
 Connections are commonly called junctions in the trade.

A

Junction boxes (J-boxes)

54
Q

 type of junction box that allows access to a raceway for snaking conductors through the raceway
 Knockouts in most boxes and other enclosures can be easily removed to allow wiring to enter the box

A

Pull box

55
Q

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

A

Raceway

56
Q

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

A

Busway

57
Q

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

A

Wire gutters or wireways

58
Q
  • In homes, electric motors are found in refrigerators, freezers, dishwashers, kitchen sink waste disposal, portable kitchen appliances, exhaust and ventilation fans, clothes washers and dryers, furnaces, air conditioners, and paddle fans.
A

ELECTRIC MOTORS

EU1 (3 decks)

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