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Understanding the NEC Volume 1 > Article 100 - Definitions > Flashcards

Article 100 - Definitions Flashcards

1
Q

A branch circuit that consists of two or more ungrounded circuit conductors with a common neutral conductor. There must be a voltage between the ungrounded conductors and an equal difference of voltage from each ungrounded conductor to the common neutral conducotr.

A

Branch Circuit, Multiwire

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2
Q

A vertical opening or space in which an elevator is designed to operate

A

Hoistway

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3
Q

The conductor used to connect the system neutral conductor or the equipment to the grounding electrode system

A

Grounding Electrode Conductor (GEC)

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4
Q

Requiring human intervention to perform a function

A

Nonautomatic

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5
Q

Constructed, protected, or treated to prevent rain from interfering with the successful operation of the apparatus under specified test conditions

A

Rainproof

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6
Q

Equipment enclosed with a means of sealing or locking so live parts can’t be made accessible without opening the enclosure

A

Sealable Equipment

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7
Q

Breakers that operate on the principle of electromagnetism only and are used for motors

A

Instantaneous Trip Circuit Breaker

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8
Q

An accommodation with two or more contiguous rooms comprising a compartment, with or without doors between such rooms, that provides living, sleeping, sanitary, and storage facilities

A

Guest Suite

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9
Q

A complete lighting unit consisting of a light source with the parts designed to position the light source and connect it to the power supply and distribute the light.

A

Luminaire

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10
Q

The point where the electric utility conductors make contact with premises wiring.

A

Service Point

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11
Q

Operation at a substantially constant load for an indefinite length of time

A

Duty, Continuous

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12
Q

An enclosed nonmetallic channel designed for holding communications wires and cables, optical fiber cables, data cables associated with information technology and communications equipment, Class 3, Class 3, and Type PLTC cables, and power-limited fire alarm cables in plenum spaces, risers, and general-purpose applications

A

Communications Raceway

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13
Q

The organization, office, or individual responsible for approving equipment, materials, an installation, or a procedure

A

Authority Having Jurisdiction (AHJ)

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14
Q

A compressor and motor enclosed in the same housing, operating in the refrigerant

A

Hermetic Refrigerant Motor-Compressor

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15
Q

The greatest difference of voltage (RMS) between an ungrounded conductor and the neutral point of the circuit that’s grounded

A

Voltage to Ground

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16
Q

Localization of an overcurrent condition to restrict outages to the circuit or equipment affected, accomplished by the choice of overcurrent protective devices

A

Coordination, Selective (Selective Coordination)

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17
Q

Electronic telecommunications equipment used for the transmission of audio, video, and data, including support equipment such as computers, as well as the conductors that are used solely for the operation of the equipment.

A

Communications Equipment

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18
Q

An area not normally subjected to dampness or wetness, but which may temporarily be subjected to dampness or wetness, such as a building under construction

A

Location, Dry

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19
Q

Equipment that controls dc voltage or dc current, or both, and is used to charge a battery or other energy storage device

A

Charge Controller

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20
Q

A point in the wiring system where electric current is taken to supply a load (utilization equipment)

A

Outlet

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21
Q

Overhead conductors between the electric utility supply and the service point

A

Service Drop

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22
Q

An opening in an outlet box where receptacles have been installed

A

Receptacle Outlet

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23
Q

An accommodation that combines living, sleeping, sanitary, and storage facilities

A

Guest Room

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24
Q

The earth

A

Ground

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25
Q

Disconnects such as circuit breaker(s), or switch(es) connected to the load end of service conductors, intended to control and cut off the service supply to the buildings or structure

A

Service Equipment

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26
Q

That which is built or constructed, other than equipment

A

Structure

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27
Q

Locations protected from weather and not subject to saturation with water or other liquids

A

Location, Damp

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28
Q

An electric circuit that controls another circuit by a relay or equivalent device installed in accordance with Article 725

A

Remote-Control Circuit

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29
Q

Connected to establish electrical continuity and conductivity

A

Bonded (Bonding)

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30
Q

Surrounded by a case, housing, fence, or walls(s) that prevents accidental contact with energized parts

A

Enclosed

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31
Q

An electrical power system that’s not connected to the ground (earth) or a conductive body that extends the ground (earth) connection

A

Ungrounded System

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32
Q

An optical fiber cable containing conductive members such as metallic strength members, metallic vapor barriers, or metallic armor or sheath

A

Conductive Optical Fiber Cable

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33
Q

A conductor, screw, or strap that connects the circuit equipment grounding conductor to the neutral conductor at service equipment in accordance with 250.24(B)

A

Bonding Jumper, Main

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34
Q

Electrically connected to a source of voltage

A

Energized

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35
Q

Constructed so that moisture won’t enter the enclosure under specific test conditions

A

Watertight

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36
Q

A fitting that’s installed in a conduit or tubing system and provides access to conductors through a removable cover

A

Conduit Body

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37
Q

An accessory, such as a locknut, intended to perform a mechanical function

A

Fitting

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38
Q

Breakers that operate on the principle that as the current increases, the time it takes for the devices to open decreases

A

Inverse Time Circuit Breaker

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39
Q

Breakers that permit the thermal trip setting to be adjusted.

A

Adjustable Trip Circuit Breaker

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40
Q

A distribution point containing overcurrent protection devices and designed to installed in a cabinet

A

Panelboard

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41
Q

Acceptable to the authority having jurisdiction, usually the electrical inspector

A

Approved

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42
Q

A device that provides a means to connect intersystem bonding conductors for communications systems (twisted wire, antennas, and coaxial cable) to the grounding electrode system, in accordance with 250.94

A

Intersystem Bonding Termination

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43
Q

Written consent from the authority having jurisdiction

A

Special Permission

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44
Q

Equipment or materials which have a label, symbol, or other identifying mark of an FEB indicating the equipment or materials were evaluated and found to comply with requirements as described in an accompanying field evaluation report

A

Field Labeled (as applied to evaluated products)

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45
Q

A device designed to be opened and closed manually, and which opens automatically on a predetermined overcurrent without damage to itself

A

Circuit Breaker

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46
Q

A device intended to protect people by de-energizing a circuit when a current imbalance has been detected that exceeds the value established for a “Class A” device

A

Ground-Fault Circuit Interrupter (GFCI)

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47
Q

The conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premises served

A

Service

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48
Q

Underground electric utility conductors from the electric utility supply to the service point

A

Service Lateral

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49
Q

An enclosure for either surface mounting or flush mounting provided with a frame in which a door can be hung

A

Cabinet

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50
Q

A power-supply system connected to ground without inserting any resistor impedance device between the system and ground

A

Grounded System

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51
Q

The greatest effective root-mean-square (RMS) difference of voltage between any two conductors of the circuit

A

Voltage (of a circuit)

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52
Q

A channel or channels, with their fittings, that support and route communications wires and cables, optical fiber cables, data cables, Class 2 and Class 3, and Type PLTC cables, and power-limited fire alarm cables in plenum, riser, and general-purpose applications

A

Cable Routing Assembly

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53
Q

Constructed or protected so that exposure to the weather won’t interfere with successful operation

A

Weatherproof

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54
Q

A factory assembly of one or more optical fibers containing no electrically conducive materials

A

Nonconductive Optical Fiber Cable

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55
Q

A cable containing optical fibers and current-carrying electrical conductors

A

Composite Optical Fiber Cable

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56
Q

A switch constructed to be installed in a device box or a box cover

A

Switch, General-Use Snap

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57
Q

Equipment that utilizes electricity for electronic, electromechanical, chemical, heating, lighting, or similar purposes

A

Utilization Equipment

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58
Q

Capable of being accidentally touched or approached to an unsafe distance

A

Exposed (as applied to live parts)

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59
Q

Overhead conductors between the service point and the first point of connection to the service-entrance conductors at the building

A

Service Conductors, Overhead

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60
Q

The system or circuit conductor that’s intentionally grounded

A

Grounded Conductor

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61
Q

Operation at loads, and for intervals of time, which may both be subject to wide variation

A

Duty, Varying

62
Q

A component of an electrical installation, other than a conductor, intended to carry or control electric energy as its principal function

A

Device

63
Q

A load where the maximum current is expected to exist for 3 hours or more continuously, such as store or parking lot lighting

A

Continuous Load

64
Q

Supplying an enclosure with a protective gas at a sufficient positive pressure to reduce the concentration of any flammable gas or vapor

A

Purged and Pressurized (Class I)

65
Q

A structure that stands alone or is separated from adjoining structures by fire walls

A

Building

66
Q

Dust particles that are 500 microns or smaller and present a fire or explosion hazard when dispersed and ignited in air.

A

Combustible Dust

67
Q

The conductors between the terminals of service equipment and service drop or overhead service conductors

A

Service-Entrance Conductors, Overhead System

68
Q

Not readily accessible to persons unless special means for access are used

A

Isolated

69
Q

An unintentional electrical connection between an ungrounded conductor and the metal parts of enclosures, raceways, or equipment

A

Ground Fault

70
Q

An interconnection of one or more storage batteries and their chargers. It can also include converters, inverters, and other associated equipment

A

Battery System

71
Q

Equipment or materials included in a list published by a testing laboratory acceptable to the AHJ. The listing organization must periodically inspect the production of listed equipment or material to ensure the equipment or material meets appropriate designated standards and is suitable for a specified purpose.

A

Listed

72
Q

An enclosed channel designed for the installation of conductors, cables, or busbars

A

Raceway

73
Q

The common point of a 4-wire, three-phase, wye-connected system; the midpoint of a 3-wire, single-phase system; or the midpoint of the single-phase portion of a three-phase, delta-connected system

A

Neutral Point

74
Q

Electrical equipment, other than industrial equipment, built in standardized sizes

A

Appliance

75
Q

The conductors between the final over-current protection device and the receptacle outlets, lighting outlets, or other outlets as defined in this article

A

Branch Circuit

76
Q

An inverter is used in parallel with an electric utility to supply common loads

A

Interactive Inverter

77
Q

An area with a sink and permanent provisions for food preparation and cooking

A

Kitchen

78
Q

The prospective symmetrical fault current at a nominal voltage to which electrical equipment can be connected without sustaining damage exceeding defined acceptance criteria

A

Short-Circuit Current Rating

79
Q

The conductors between the terminals of service equipment and underground service conductors

A

Service-Entrance Conductors, Underground System

80
Q

On or attached to the surface of a building, or behind panels designed to allow access

A

Exposed (as applied to wiring methods)

81
Q

Visible and not more than 50 feet away from the equipment

A

In Sight From (Within Sight)

82
Q

An organization or part of an organization that performs field evaluations of electrical or other equipment

A

Field Evaluation Body (FEB)

83
Q

An assembly of parts for the field conversion of utilization equipment

A

Retrofit Kit

84
Q

A wiring device at the end of a flexible cord intended to be inserted into a receptacle in order to make an electrical connection

A

Attachment Plug (Plug Cap), (Plug)

85
Q

The conductive path(s) that provides a ground-fault current path and connects metal parts of equipment to the system neutral conductor, to the grounding electrode conductor, or both

A

Grounding Conductor, Equipment (EGC)

86
Q

A load where the current waveform doesn’t follow the applied sinusoidal voltage waveform

A

Nonlinear Load

87
Q

The conductor connected to the neutral point of a system that’s intended to carry current under normal conditions

A

Neutral Conductor

88
Q

Not permanently closed in by the building structure or finish and capable of being removed or exposed without damaging the building structure or finish

A

Accessible (as it applies to wiring methods)

89
Q

A surface, flush, or freestanding raceway designed to hold conductors and receptacles

A

Multioutlet Assembly

90
Q

An enclosure constructed or protected so that exposure to a beating rain won’t result in the entrance of water under specified test conditions

A

Raintight

91
Q

A general term including fittings, devices, appliances, luminaires, machinery, and the like as part of, or in connection with, an electrical installation.

A

Equipment

92
Q

A space that provides independent living facilities, with space for eating, living, and sleeping, as well as permanent facilities for cooking and sanitiation

A

Dwelling Unit

93
Q

Adjustable-speed drives are often referred to as what?

A

Variable-speed drives or variable-frequency drives (VFD’s)

94
Q

An outlet for the connection of a lampholder or luminaire

A

Lighting Outlet

95
Q

Electrical equipment immersed in a protective liquid

A

Oil Immersion

96
Q

Current, in amperes, greater than the rated current of the equipment or conductors resulting from an overload, short circuit, or ground fault

A

Overcurrent

97
Q

An electrical source, other than a service, having no direct connection(s) to circuit conductors of any other electrical source other than those established by grounding and bonding connections

A

Separately Derived System

98
Q

Recognized as suitable for a specific purpose, function, or environment by listing, labeling, or other means approved by the authority having jurisdiction

A

Identified Equipment

99
Q

A building that consists solely of one dwelling unit

A

Dwelling, One-Family

100
Q

Connected to ground or to a conductive body that extends the ground connection

A

Grounded

101
Q

A device that establishes a conductive connection between conductors or between a conductor and a terminal by the means of mechanical pressure

A

Connector, Pressure (Solderless)

102
Q

A building that consists solely of two dwelling units

A

Dwelling, Two-Family

103
Q

The highest short-circuit current at rated voltage the device is identified to interrupt under standard test conditions

A

Interrupting Rating

104
Q

The ratio of the maximum demand to the total connected load

A

Demand Factor

105
Q

A system intended to provide protection of equipment from damaging ground-fault currents by opening all ungrounded conductors of the faulted circuit. This protection is provided at current levels less than those required to protect conductors from damage through the operation of a supply circuit overcurrent device

A

Ground-Fault Protection of Equipment

106
Q

An installation underground, in concrete slabs in direct contact with the earth, as well as locations subject to saturation with water, and unprotected locations exposed to weather

A

Location, Wet

107
Q

Rendered inaccessible by the structure or finish of the building.

A

Concealed

108
Q

A contact device installed at an outlet for the connection of an attachment plug, or for the direct connection of equipment designed to mate with the contact device (SQL receptacle)

A

Receptacle

109
Q

Underground conductors between the service point and the first point of connection to the service-entrance conductors in a terminal box, meter, or other enclosure ,inside tor outside the building wall

A

Service Conductors, Underground

110
Q

A factory assembly or field assembly of optical fibers having an overall covering

A

Optical Fiber Cable

111
Q

A device that opens all of the ungrounded circuit conductors from their power source. This includes devices such as switches, attachment plugs and receptacles, and circuit breakers

A

Disconnecting Means

112
Q

The operation of equipment above its current rating, or current in excess of conductor ampacity.

A

Overload

113
Q

An enclosure for underground system use sized to allow personnel to reach into it for the purpose of installing or maintaining equipment or wiring. It may have an open or closed bottom.

A

Handhole Enclosure

114
Q

The connection between the neutral conductor and the supply-side bonding jumper or equipment grounding conductor, or both, at a separately derived system transformer or separately derived system generator

A

Bonding Jumper, System

115
Q

A device intended to de-energize the circuit when it detects the current waveform characteristic unique to an arcing fault

A

Arc-Fault Circuit Interrupter (AFCI)

116
Q

An arrangement of incandescent lamps, electric-discharge lighting, or other electrically powered light sources to outline or call attention to certain features such as the shape of a building or the decoration of a window

A

Outline Lighting

117
Q

A value assigned for conveniently designating voltage classes, such as 120/240V, 120/208V, or 277/480V

A

Voltage, Nominal

118
Q

Equipment used for creation and manipulation of data, voice, and video, but not communications equipment

A

Information Technology Equipment

119
Q

A conductor that ensures electrical conductivity between metal parts of the electrical installation

A

Bonding Conductor or Jumper

120
Q

A fixed, stationary, or portable self-contained, electrically operated and/or electrically illuminated piece of equipment with words or symbols designed to convey information or attract attention

A

Electric Sign

121
Q

The conductors from the service point to the service disconnect

A

Service Conductors

122
Q

Supplying an enclosure with a protective gas with or without continuous flow at sufficient pressure to prevent the entrance of a flammable gas or vapor, a combustivbe dust, or an ignitible fiber

A

Purged and Pressurized (Class I or II)

123
Q

A building or portion of a building where self-propelled vehicles can be kept

A

Garage

124
Q

Equipment enclosed in a manner that excludes dust and doesn’t permit arcs, sparks, or heat inside the enclosure to ignite accumulations or suspensions of a specified dust on, or in, the vicinity of the enclosure

A

Dust-Ignitionproof

125
Q

A nonmetallic raceway placed within a larger raceway

A

Innerduct

126
Q

A non-habitable room or space intended primarily for the storage of garments and apparel

A

Clothes Closet

127
Q

A branch circuit that only supplies one load

A

Branch Circuit, Invidual

128
Q

A system comprised of multiple electric power sources, such as photovoltaic, wind, micro-hydro generators, engine-driven generators, and others, but not the electric utility power system

A

Hybrid System

129
Q

The circuit of a control apparatus or system that carries the electric signals directing the performance of the controller but doesn’t carry the main power current

A

Control Circuit

130
Q

The maximum current, in amperes, a conductor can carry continuously, under the conditions of use without exceeding its temperature rating

A

Ampacity

131
Q

Systems of illumination utilizing fluorescent lamps, high-intensity discharge (HID) lamps, or neon tubing.

A

Electric-Discharge Lighting

132
Q

The interior and exterior wiring, including power lightning, control, and signal circuits, and all associated hardware, fittings, and wiring devices. This includes both permanently and temporarily installed wiring from the service point to the outlets, or where there’s no service point, wiring from and including the electric power source, such as a generator, transformer, or PV system to the outlets

A

Premises Wiring

133
Q

A building that contains three or more dwelling units

A

Dwelling, Multifamily

134
Q

Functioning without the necessity of human intervention

A

Automatic

135
Q

A piece of equipment that provides a way to adjust the speed of an electric motor

A

Adjustable Speed Drive

136
Q

Capable of being reached quickly for operation, renewal or inspections without requiring those to whom ready access is requisite to take actions such as the use tools (other than keys), to climb over or under, remove obstacles, or resort to portable ladders, and so forth

A

Accessible, Readily

137
Q

A system that supplies power independently of an electrical production and distribution network

A

Stand-Alone System

138
Q

A circuit that energizes signaling equipment

A

Signaling Circuit

139
Q

An area that includes a basin as well as one or more of the following: a toilet, urinal, tub, shower, bidet, or similar plumbing fixture

A

Bathroom

140
Q

The combination of all components and subsystems that convert solar energy into electric energy for utilization loads

A

Photovoltaic (PV) System

141
Q

This is a manufactured assembly designed to support and energize luminaires that can be readily repositioned on the track, and whose length may be altered by the addition or subtraction of sections of track

A

Lighting Track

142
Q

A device intended to provide limited overcurrent protection for specific applications and utilization equipment, such as luminaires and appliances. This limited overcurrent protection is in addition to the required overcurrent protection provided in the branch circuit by the branch circuit overcurrent protection device

A

Overcurrent Protection Device, Supplementary

143
Q

Equipment capable of withstanding an explosion that may occur within it, and of preventing the ignition of gas or vapor surrounding the enclosure by sparks, flashes, or an explosion within, and that operates at such an external temperature that surrounding flammable atmosphere won’t be ignited by its heat.

A

Explosionproof Equipment

144
Q

A combination of an adjustable speed drive, its associated motor(s), and any other equipment associated with the two

A

Adjustable Speed Drive System

145
Q

Equipment or materials that have a label, symbol, or other identifying mark in the form of a sticker, decal, printed label, or with the identifying mark molded or stamped into the product by a testing laboratory acceptable to the AHJ.

A

Labeled

146
Q

Enclosures constructed so that dust won’t enter under specific test conditions

A

Dusttight

147
Q

A protective device intended to limit transient voltage by diverting or limiting surge current and preventing the continued flow of current while remaining capable of repeating these function

A

Surge Protection Device (SPD)

148
Q

A device that controls the electric power delivered to electrical equipment in some predetermined manner

A

Controller

149
Q

A person who has the skill and knowledge related to the construction and operation of electrical equipment and its installation. This person must have received safety training to recognize and avoid the hazards involved with electrical systems

A

Qualified Person

150
Q

An intentionally constructed low-impedance conductive path designed to carry fault current from the point of a ground fault to the source for the purpose of opening the circuit overcurrent protective device

A

Effective Ground-Fault Current Path

151
Q

The conductors between the service equipment, a separately derived system, or other power supply and the final branch-circuit overcurrent protection device

A

Feeder

Understanding the NEC Volume 1 (3 decks)

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