Article 100 Definitions Flashcards
Acceptable to the authority having jurisdiction.
Approved
Power conversion equipment that provides a means of adjusting the speed of an electric motor.
Adjustable speed drive
An organization, office, or individual responsible for enforcing the requirements of a code or standard.
Authority having jurisdiction
Connected to establish electrical continuity and conductivity.
Bonded
The connection between the grounded circuit conductor and the equipment grounding conductor at the service.
Main bonding jumper
The connection between two or more portions of the equipment grounding conductor.
Equipment bonding jumper
The connection between the grounded circuit conductor and the supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived system.
system bonding jumper
The circuit conductors between the final overcurrent device protecting the circuit and the outlet.
Branch circuit
An enclosure that is designed for either surface mounting or flush mounting and is provided with a frame, mat, or trim in which a swinging door or doors are or can be hung.
Cabinet
A branch circuit that supplies two or more receptacles or outlets for lighting and appliances.
General-purpose branch circuit
A device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating.
Circuit breaker
A qualifying term indicating that the circuit breaker can be set to trip at various values of current, time, or both, within a predetermined range.
Adjustable (circuit breaker)
A qualifying term indicating that no delay is purposely introduced in the tripping action of the circuit breaker.
Instantaneous trip (circuit breaker)
A qualifying term indicating that there is purposely introduced a delay in the tripping action of the circuit breaker, which delay decreases as the magnitude of the current increases.
Inverse time (circuit breaker)
A qualifying term indicating that the circuit breaker does not have an y adjustment to alter the value of the current at which it will trip or the time required for its operation.
Nonadjustable (circuit breaker)
A cylindrical assembly composed of a conductor centered inside a metallic tube or shield, separated by a dielectric material, and usually covered by an insulating jacket.
Coaxial cable
Rendered inaccessible by the structure or finish of the building.
Concealed
A conductor encased within a material of composition or thickness that is not recognized by the Code as electrical insulation
Covered conductor
A load where the maximum current is expected to continue for 3 hours or more.
Continuous load
Localization of an overcurrent condition to restrict outages to the circuit or equipment affected.
Coordination
An enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the enclosure.
Cutout box
The ratio or the maximum demand of a system, or part of a system, to the total connected load of a system or the part of the system under consideration.
Demand factor
A unit of an electrical system, other than a conductor, that carries or controls electric energy as its principal function.
Device
Operation at a substantially constant load for an indefinitely long time.
Continuous duty
Operation for alternate intervals of 1) load and no load 2) load and rest 3) load, no load, and rest.
Intermittent duty
Intermittent operation in which the load conditions are regularly recurrent.
Periodic duty
Operation at a substantially constant load for a short and definite, specified time.
Short-time duty
Operation at loads, and for intervals of time, both of which may be subject to wide variation.
Varying duty
A building containing three or more dwelling units.
Multifamily dwelling
All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device.
Feeder
Systems of illumination utilizing flourescent lamps, high-intensity discharge (HID) lamps, or neon tubing.
Electric-discharge lighting
A string of outdoor lights that is suspended between two points
Festoon lighting
A system or circuit conductor that is intentionally grounded.
Grounded conductor (neutral)
Connecting to ground or to a conductive body that extends the ground connection.
Grounding
A device intended for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when a current to ground exceeds the values established for a class A device.
Ground-fault circuit interrupter (GFCI)
The conductive path(s) that provides a ground-fault current path and connects normally non-current-carrying metal parts or equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.
Equipment grounding conductor
A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.
Grounding electrode conductor
An enclosure for use in underground systems, provided with an open or closed bottom, and sized to allow personnel to reach into, but not enter, for the purpose of installing, operating, or maintaining equipment or wiring or both.
Handhole enclosure
The specified equipment is to be visible and not more than 50’ away from the other.
In sight from (within sight from, within sight)
Locations protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture
Damp location
Installations underground or in concrete slabs or masonry in direct contact with the earth; in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather.
Wet location
A type of surface, flush, or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at a factory.
Multioutlet assembly
The conductor connected to the neutral point of a system that is intended to carry current under normal conditions.
Neutral conductor
A load where the wave shape of the steady-state current does not follow the wave shape of the applied voltage.
Nonlinear load
A point on the wiring system at which current is taken to supply utilization equipment.
Outlet
A device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of overcurrent between its rated current and its interrupting rating.
Branch-circuit overcurrent protective device
A device intended to provide limited overcurrent protection for specific applications and utilization equipment such as luminaires and appliances. Used in additionto the branch-circuit overcurrent protective device.
Supplementary overcurrent protective device
Operation of equipment in excess of normal, full-load rating, or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating.
Overload
A compartment or chamber to which one or more air ducts are connected and that forms part of the air distribution system.
Plenum
An enclosed assembly that may include receptacles, circuit breakers, fuseholders, fused switches, buses, and watt-hour meter mounting means; intended to supply and control power to mobile homes, recreational vehicles, park trailers, or boats or to serve as a means for distributing power required to operate mobile or temporarily installed equipment.
Power outlet
One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid hazards involved.
Qualified person
Constructed, protected, or treated so as to prevent rain from interfering with the successfully operation of the apparatus under specified test conditions.
Rainproof
Constructed or protected so that exposure to a beating rain will not result in the entrance of water under specified test conditions.
Raintight
A single contact device with no other contact device on the same yoke.
Single receptacle
Two or more contact devices on the same yoke.
Multiple receptacle
An outlet where one or more receptacles are installed.
Receptacle outlet
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.
Separately derived system
The conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premises served.
Service
The conductors from the service point to the service disconnecting means.
Service conductors
The overhead conductors between the service point and the first point of connection to the service-entrance conductors at the building entrance.
Overhead service conductors
The 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 or outside the building wall.
Underground service conductors
The overhead conductors between the utility electrical supply system and the service point.
Service drop
The service conductors between the terminals of the service equipment and the point of connections to the service lateral/underground service conductors, or the service drop/overhead service conductors.
Service entrance conductors
The point of connection between the facilities of the serving utility and the premises wiring.
Service point
The written consent of the authority having jurisdiction.
Special permission
A protective device for limiting surge voltages by discharging or bypassing surge current; it also prevents continued flow of follow current while remaining capable of repeating these functions.
Surge arrester
An automatic or nonautomatic device for transferring one or more load conductor connections from one power source to another.
Transfer switch
A switch intended for isolating an electrical circuit from the source of power. It has.no interrupting rating.
Isolation switch
A manually operated device used in conjuction 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
A large single panel, frame, or assembly of panels on which are mounted on the face, back, or both, switches, overcurrent and other protective devices, buses, and usually instruments.These assumes are generally accessible from the rear as well as from the front and are not intended to be installed in cabinets.
Switchboard
An assembly completwly enclosed on all sides and top with sheet metal (except for vetilation) and containing primary power circuit switching, interrupting devices, or both, with buses and connections. The assembly may include control and auxiliary devices. Access to the interior of the enclosure is provided by doors, removable covers, or both.
Switchgear
A protective device for assembly as an integral part of a motor or motor-compressor that, when properly applied, protects the motor against dangerous overheating due to overload and failure to start.
Thermal protector
Not connected to ground or to a conductive body that extends the ground connection.
Ungrounded
The greatest root-mean-square (rms) difference of potential between any two conductors of the circuit concerned.
Voltage
A nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class.
Nominal voltage
Constructed so that moisture will not enter the enclosure under specified test conditions.
Watertight
Constructed or protected so that exposure to the weather will not interfere with successful operation.
Weatherproof
An overcurrent protective device with a circuit-opening fusible part that is heated and severed by the passage of overcurrent through it.
Fuse
A conductor installed on the supply side of a service or within a service equipment enclosure(s), or for a separately derived system, that ensures the required electrical conductivity between metal parts required to be electrically connected.
Supply-side bonding jumper
