PEC Flashcards
(135 cards)
1
Q
Conductors and equipment for delivering energy from the serving utility to the wiring system of the premises served.
- Service Line
- service drop
- service conductor
- service
A
Service
2
Q
How many service should be in building or other structure?
A
One
3
Q
A structure that stands alone or the is cut off from adjoining structures by fire walls
A
Building
4
Q
Service conductors made up in the form of cable
A
Service Cable
5
Q
the underground service conductors between the street main
A
Service Lateral
5
Q
Minimum size of underground conductor
A
8mm^2
5
Q
The overhead service conductors from the last pole or other aerial support
A
Service Drop
5
Q
the conductors from the service point to the service disconnecting means
A
Service Conductors
5
Q
the point of connection between facilities of the serving utility and the premises wiring
A
Service Point
6
Q
the service conductors between the terminals of the service equipment and a point usually outside the building
A
SEC as Overhead System
6
Q
The service conductors between the terminals of the service equipment and the point of connection to the service lateral
A
SEC as Underground System
7
Q
Service drop conductors not in excess of 600 volts shall have a minimum clearance of _____ feet over residential property and driveways and those commercial areas not subject to truck traffic.
A
12
7
Q
Each service drop or service lateral shall supply one how many set of servuce entrance conductors
A
One
7
Q
The raceway that encloses the service entrance conductors
A
Service Raceway
7
Q
the necessary equipment usually consisting of circuit breakers, or switches and fuses
A
Service Equipment
7
Q
When re-routing conduit, ut may be necessary to increase the wire size, if the distance is greater in order to _________
A
compensate for voltage drop
7
Q
The minimum size service lateral to a bramch circuit limited load is ________ copper.
A
8
7
Q
Of the two to six service disconnecting means in a panel only a disconnect used for ____________ permitted to be remote from other disconnects.
A
a water pump intended for fire protection
7
Q
Give the minimum vertical clearance from finished grade of a service drop conductor installed between buildings on residential properties and driveways.
A
3000 mm
8
Q
When the voltage between service conductors does not exceed 300 v and the roof has a slope of not less than 100mm, the clearance can be reduced to
A
900mm
8
Q
the maximum clearance for service drops over buildings
A
9 feet
9
Q
service conductors passing over roofs must have a clearance over the roof which they pass of:
A
2400 mm
10
Q
A ________ refers to the circuit conductor between the service equipment and the branch circuit over current device.
A
feeder
11
Q
Service using copper conductors shall have sufficient capacity and shall NOT smaller than
A
8.0 sq. mm.
12
A conducting connection, whether intentional or accidental between an electrical circuit or equipment and the earth to or some conducting body that serves in place o the earth.
Ground
13
Connected to earth or to some conducting body that serves in place of the earth.
Grounded
14
Intentionally connected to earth through a ground connection or connections of sufficiently low impedance and having sufficient current-carrying capacity to prevent the buildup of voltages that may result in undue hazards to connected equipment or to persons.
Grounded, Effectively
15
a circuit in which one conductor point (usually the neutral conductor or neutral point of transformer or generator winding) is intentionally grounded (either solidly, or through a grounding device.
Grounded Circuit
16
a system or circuit conductor that is intentionally grounded.
Grounded conductor
17
a conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes.
Grounding conductor
18
the conductor used to connect the non-current-carrying metal parts of equipment raceways, and other enclosures to the systems grounded conductor. the electrode conductor, at the service or both equipment or at the source of a separately derived system
Grounding conductor, equipment
19
the conductor used to connect the grounding electrode(s) to the equipment grounding conductor, to the grounded conductor, or to both, at the service, at each building or structure where supplied by a feeder(s) or branch circuit(s), or at the source of a separately derived system.
Grounding Electrode Conductor
20
the permanent joining of metallic parts to form an electrically conductive path
that ensures electrical continuity and the capacity to conduct safely any current likely to be imposed
Bonded( Bonding)
21
a reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.
Bonding Jumper
22
the conductor between two or more portions of the equipment grounding conductor.
Bonding Jumper, Equipment
23
the connection between the grounded circuit conductor and the equipment.
Bonding Jumper, Main
24
may be used as grounding electrode provided it is effectively grounded
Metal Frame of the Building Structure
25
a buried metal water pipe is suitable grounding electrode if there is 3000 mm or more
Metal Underground Water Pipe
26
an electrode encased by at least 50 mm^2of concrete located within and near the bottom of a concrete foundation or footing that is direct contact with the earth
Concrete-Encased Electrodes
27
Consisting at least 6000 mm of bare copper conductor not smaller than 30 mm^2 encircling the building or structure
Ground ring
28
shall NOT be used as a grounding electrode
Metal Underground gas Piping System
29
such as piping systems and underground metal wall casings that are not effectively bonded to a metal water pipr
Local Metal Underground System
30
shall not less than 2400 mm in length and shall consists of the following materials
Rod and Pipe electrodes
31
shall not be smaller than 20 mm trade size
Electrodes of pipe or conduit
32
Rods used electrodes made of steel or iron shall not be less than 16 mm in diameter
True
33
The electrode shall be installed such that at least 2400 mm in length is in contact with the soil.
True
34
.shall expose not less than one fifth m^2 of surface to exterior of soil
Plate electrodes
35
shall not be used as a grounding electrode
aluminum electrodes
36
any curent in xcess of the rated current of equipment or the ampacity of the conductor.
Overcurrent
37
most often between one and six times the normal current level an excessive current relative to normal operating current but one which is confined to normal conductive path.
Overload Currents
38
or fault current, can be may hundreds of times larger than the normal operating current
Short-circuit current
39
an over current protection device with circuit operating fusible member which is heated and severed by the passage of overcurrent through it.
Fuse
40
encapsulated in a tube and connected to contact terminals, comprise the fundamental elements of the basic fuse.
Fusible Link
41
the RMS (alternating) or direct voltage rating for which fuse is designated.
Fuse Voltage Rating
42
the designated RMS alternating or direct current for which fuse will carry continuously under stated conditions.
Fuse Current rating
43
ampere interrupting capacity rating of a fuse, is the maximum short circuit current which the fuse will interrupt safely.
AIC Rating
44
a single-element fuse which may have one or more links under normal operation
Non-time Delay Fuse
45
it can be applied in circuits subject to temporary motor overloads and surge currents
Dual Element Time Delay Fuse
46
shall be used only for replacements in existing installations where there is no evidence of overfusing or tampering
Edison Bare Plug Fuse
47
can be considered as an improvement on the Edison bas plug fuses have a design that prevents a larger fuse from being insered in circuits designed for lower ratings.
Type S fuses
48
are the ferrule type and knife-blade type
Cartridge Type Fuses
49
a device designed to open and close a circuit by non-automatic means and to open the circuit automatically
Circuit Breakers
50
the tripping mechanism is enclosed in molded plastic housing
Molded-Case Circuit Breaker
51
the larger, heavier type used in industrial applications
Power Circuit Breaker
52
responds to current only
Magnetic Type Circuit Breaker
53
with adjustable trip rating and setting
Solid-State Circuit Breaker
54
the rating of disconnecting means shall be _______ times the full load current
115%
55
Common electrical conductors
wires and cables
55
A conductor having no covering or electrical insulation whatsoever
Bare
56
A conductor encased within material of composition and thickness that is NOT recognized by this Code
Covered
56
Conductors consist of a group of wires twisted to forma metallic string where installed raceways, conductors of size 8 mm^2 and larger shall be stranded
Stranded
56
the current, in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature its temperature rating
Ampacity
56
A conductor encased within material of composition and thickness that is recognized by this Code
Insulated
57
reduction to a certain percentage of allowable ampacity conductors
Ampacity Derating
58
a unit or assembly of units or sections and associated fittings forming a rigid structural system
Cable Tray System
59
is an exposed wiring method using cleats, knobs, tubes, and flexible tubing for the protection and support of SINGLE insulated conductors run in or on buildings, and NOT concealed by the building structure
Open wiring on Insulation
60
is an exposed wiring support system using a messenger wire to support insulated conductors
Messenger Supported Wire
61
are a wiring method using knobs, tubes, and flexible nonmetallic tubing for the protection and support of a single insulated conductors.
Concealed Knob-and-Tube Wiring
62
is a factory assembly of one or more conductors, each individually insulated and enclosed in a loose fit, nonmetallic flexible conduit as integrated gas spacer cable rated 0 through 600 volts
Integrated Gas Spacer Cable (IGS)
63
A single or multi-conductor solid dielectric insulated cable rated 2001 volts or higher
Medium Voltage Cable (MV)
64
consistc of three or more flat copper condcutors
Flat Conductor Cable (IGS)
65
is a factory assembly of one or more conductors : mineral insulation and enclosed in a liquid tight and gastight continous copper
Mineral Insulated, Metal-Sheathed Cable
66
is a pliable corrugated raceway of circular cross section
Electrical Nonmetallic Tubing
67
fabricated assembly of insulated conductors in a flexible metallic enclosure.
Armored Cable (AC)
68
in an armor of interlocking metal tape
Metal-Clad Cable
69
an outer sheath of moisture resistant, flame retardant, nonmetallic material
Non-metallic sheathed Cable
70
a listed type UF cable in sizes 2mm ^2 copper or 3.5 mm ^2 aluminum or copper-clad aluminum through 100 mm^2
Underground feeder & branch Circuit
71
is a single conductor or multi-conductor assembly provided with or without an overall covering
Service entrance Cable
72
associated bare or covered grounding conductors under non-metallic sheath, for installation of cable tray, in a raceways where supported by messenger wire.
Power and Control Tray Cable (TC)
73
are assembly of two insulated conductors within non-metallic jacket or an extruded thermoplastic covering.
Nonmetallic extensions
74
Are wiring accessories or channels designed for holding wires, cables or bus bars which are either made of metals or any insulating materials
Raceways
75
most common raceways
Conduit
76
accessories such as locknuts, bushings, couples adapters, nipples and connectors or other part system that is intended primarily to perform a mechanical rather than an electrical function
Fittings
77
a metal sleeve, usually made of copper, that is slipped over and secured to the butted ends of conductor in making a joint: also called splicing sleeve
Connectors
78
a factory assembly of conductors or cables inside a nonmetallic, smooth wall conduit with a circular cross section.
Nonmetallic Underground Conduit with condcutors
79
is a listed steel raceway of circular cross section with integral or associated couplings approved for the installation of electrical conductors and used with listed fittings to provide electrical continuity
Intermediate Metal Conduit
80
is a listed metal raceway of circular cross section with integral or associated couplings, approved for the nation of electrical conductors and used with listed fittings to provide electrical continuity
Rigid Metal Conduit
81
apply to a type of conduit and fittings of suitable nonmetallic material that is resistant to moisture and chemical atmospheres.
Rigid Nonmetallic Conduit
82
Section is a listed metallic tubing of circular cross approved for the installation of electrical conductors when joined together with listed fittings.
Electrical Metallic Tubing
83
is a listed tubing that is circular in cross section, flexible, metallic and liquid tight without a nonmetallic jacket
Flexible Metal Tubing
84
is a raceway of circular cross section made of helically wound, formed, interlocked metal strip
Fleixible Metal Conduit
85
is a listed raceway of circular cross section having an outer liquid tight, nonmetallic, sunlight-resistant jacket over an inner flexible metal core with associated couplings, connectors, and fittings and approved for the Installation of electric conductors.
Liquid Tight Flexible Metal
86
s listed raceway of circular cross section of various types: LFNC-A,LFNC-B, LFNG-C, It is flame-retardant, with fittings, and is approved for the installation of electrical
Liquid Tight Flexible Metal and Nonmetallic Conduit- NONMETAL
87
it has become popular for extensions from existing CO, or new works, as well as for modernization
Surface Metal Raceway
88
its materials is resistant to moisture and chemical atmosphere, flame-retardant, resistant to impact and crushing, resistant to distortion from heat under conditions likely to be encountered in service, and resistant to
low-temperature effects, and those that have limited smoke-producing characteristics shall be permitted to be identified with the suffix LS (limited-smoke)
Surface NonmetalRaceway
89
a type of surface flush or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at the factory.
Multi-outlet assembly
90
a raceway suitable for beneath the surface of concrete or other flooring material or in office
Underfloor raceway
91
spaces of cellular metal floors, together with suitable fittings, that may be approved as enclosures for electrical conductors
Cellular Metal Floor raceway
92
its cell shall be a single, enclosed tubular space in a floor made of precast call concrete slabs, the direction of the cell being parallel to the direction of the floor member
Cellular Concrete Floor Raceway
93
are sheet metal troughs with hinged or removable covers for housings and protecting electric wires and cable and in which conductors are laid in parallel after the Wine ways has been installed as a complete system.
Cellular Concrete Floor Raceway-METAL
93
are fame-retardant, nonmetallic troughs with removable covers for housing and protecting electric wires and cables in which conductors are laid in parallel after the Wire ways has been installed as a complete system
Cellular Concrete Floor Raceway-NONMETALLIC
94
-is an assembly of parallel conductors formed integrally with an insulating material web specifically designed for field installation in surface metal raceway
Flat Cable Assemblies (FC)
95
a grounded metal enclosure containing factory-mounted, bare or insulated conductors, which are usually copper or aluminum bars, rods, or tubes
Busways
96
an assembly of insulated conductors with fittings and conductor terminations in a completely enclosed ventilated protective metal housing
Cable bus
97
are made of galvanized metal or polyvinyl chloride (PVC), and they come in four shapes of different sizes such as, square, rectangular circular, and octagon
Boxes
98
with a blank cover, serves the purpose of joining different runs of raceways, or cables, and provides Sufficient space for connection and branching of the enclosed circuit.
Junction Box
99
box-with a blank cover, which is inserted in one or more runs of raceways to facilitate pulling in the conductors may also serve to distribute the conductors
Pull Box
100
used for mounting flush-type switches and/or convenience outlets.
Plates
101
they are either metallic of Bakelite type for covering mounted switches and convenience outlets
Covers
101
electrical devices Used to control the circuit closing and opening
Switches
102
A manually operated device used in conjunction with a transfer switch to provide a means of directly connecting load conductors to a power source, and of disconnecting the transfer switch.
Bypass Isolation Switch
103
- A form of general-use switch constructed so that it can be installed in device boxes or on box cover, or otherwise used in conjunction wiring system recognized by the Code.
General-Used Snap Switch
104
A switch intended for use in general distribution and branch circuits. It is rated in amperes. and it is capable of interrupting its rated current at its rated voltage.
General-Use Switch
105
A switch intended for isolating an electric current from the source of power. It has no interruption rating, and is intended be operated only after the circuit has been opened by some other means.
Isolating Switch
106
A switch rated in horsepower that is capable of interrupting the maximum operating overload current of a motor of the same horsepower rating as the switch at the rated voltage.
Motor Circuit Switch
107
An automatic or non-automatic device for transferring one or more load conductor connections from one power source to another
Transfer Switch
108
an enclosure designed for surface mounting and having a swinging doors, or covers, secured directly to and telescoping with the walls of the box proper.
Cutout box
109
an enclosure designed for surface or flush mounting and provided with a frame, mat, or trim in which and telescoping with the walls of the box proper Swinging doors are may be hung
Cabinet
110
a sheet-metal enclosure for conductors cables and bus bars at switchboards, meter centers distribution centers and similar location points.
auxiliary
111
a large single panel, frame, or assembly of panels on which are mounted, on the face or back or both, switches over current and other protective devices, buses,
Switchboards
112
single panel or group of panel units designed for assembly in the form of a single panel including buses, automatic over current devices, and equipped with or without switches for the control of light, heat, or power circuits: designed to be placed in a cabinet or cutout box in or against a wall or partition and accessible only from the front
Panelboard
113
a general term covering an assembly or assemblies of devices for switching, interrupting, controlling. metering of electric power.
Switchgear
114
In sockets, extension cords is protected by means of the _______ knot.
under-writers
115
Rigid metal conduit is permitted for wiring in hazardous locations if the conduit is threaded and made up wrench tight with at least _________ full threads .
5
116
Flexible cords and cables shall be protected by ___________ where passing through holes in covers, outlet boxes, or similar enclosures.
fittings and bushings
