Definitions- General Flashcards
Accessible (as applied to equipment)
Capable of being reached for operation, renewal and inspection
Accessible (as applied to wiring methods)
Capable of being removed or exposed without damaging the building or structure or finish or not permanently closed in by the structure or finish of the building
Accessible, Readily (Readily Accessible)
Capable of being reached quickly for operation, renewal or inspections w/o requiring those to whom ready access is requisite to take actions such as to use tools (other than keys), to climb over or under, to remove obstacles, or to resort to portable ladders, and so forth
Informational note: Use of keys is a common practice under controlled or supervised conditions and a common alternative to the ready access requirements under such supervised conditions as provided elsewhere in the NEC
Adjustable Speed Drive
Power conversion equipment that provides a means of adjusting the speed of an electric motor
Informational Note: A variable frequency drive is one type of electronic adjustable speed drive that controls the rotational speed of an ac electric motor by controlling the frequency and voltage of the electrical power supplied to the motor
Adjustable Speed Drive System
A combination of an adjustable speed drive, its associated motor(s), and auxiliary equipment
Ampacity
The maximum current, in amperes, that a conductor can carry continuously under the conditions of use w/o exceeding its temperature rating
Appliance
Utilization equipment, generally other than industrial, that is normally built in standardized sizes or types and is installed or connected as a unit to perform one or more functions such as clothes washing, air-conditioning, food mixing, deep frying and so forth
Approved
Acceptable to the authority having jurisdiction
Arc-Fault Circuit Interrupter (AFCI)
A device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected
Askarel
A general term for a group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating media
Information Note: Askarels of various compositional types are used. Under arcing conditions, the gases produced, while consisting predominately of noncombustible hydrogen chloride, can include carrying amounts of combustible gases, depending on the askarel type
Attachment Finding
A device that, by insertion into a locking support and mounting receptacle, establishes a connection between the conductors of the attached utilization equipment and the branch-circuit conductors connected to the locking support and mounting receptacle
Informational Note: An attachment fitting is different from an attachment plug because no cord is associated w the fitting. An attachment fitting in combination w a locking support and mounting receptacle secures the associated utilization equipment in place and supports its weight.
Attachment Plug (Plug Cap) (Plug)
A device that, by insertion in a receptable, establishes a connection between the conductors of the attached flexible cord and the conductors connected permanently to the receptacle.
Authority Having Jurisdiction (AHJ)
An organization, office, or individual responsible for enforcing the requirements of a code or standard, or for approving equipment, materials, and installation or a procedure.
Informational Note: The phrase “authority having jurisdiction,” or its acronym AHJ, is used in NFPA documents in a broad manner, since jurisdictions and approval agencies vary, as do their responsibilities. Where public safety is primary, the authority having jurisdiction may be federal, state, local or other regional department or individual such as a fire chief; fire marshal; chief of fire prevention bureau, labor department, or health department; building official; electrical inspector; or others having statutory authority. For insurance purposes, an insurance inspection department, rating bureau or other insurance company representative may be the authority having jurisdiction. In many circumstances, the property owner or his or her designated agent assumes the role of the authority having jurisdiction; at government installations, the commanding officer or departmental official may be the authority having jurisdiction.
Automatic
Performing a function w/o the necessity of human intervention
Bathroom
An area including a sink (basin) with one or more of the following: a toilet, a urinal, a tub, a shower, a bidet, or similar plumbing fixtures
Battery System
Interconnected battery subsystems consisting of one or more storage batteries and battery chargers, and can include inverters, converters and associated electrical equipment
Bonded (Bonding)
Connected to establish electrical continuity and conductivity
Bonding Conductor or Jumper
A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected
Bonding Jumper, Equipment
The connection between two or more portions of the equipment grounding conductor
Bonding Jumper, Main
The connection between the grounded circuit conductor and the equipment grounding conductor or the supply-side bonding jumper, or both, at service.
Bonding Jumper, Supply-Side
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
Branch Circuit
The circuit conductors between the final over-current device protecting the circuit and the outlet(s)
Branch Circuit, Appliance
A branch circuit that supplies energy to one or more outlets to which appliances are to be connected and that has no permanently connected luminaires that are not a part of an appliance
Branch Circuit, General-Purpose
A branch circuit that supplies two or more receptacles or outlets for lighting and appliances
Branch Circuit, Individual
A branch circuit that supplies only one utilization equipment
Branch Circuit, Multiwire
A branch circuit that consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system
Building
A structure that stands alone or that is separated from adjoining structures by fire walls
Cabinet
An enclosure that is designed for either surface mounting or flush mounting that is provided w a frame, mat, or trim in which a swinging door or doors are or can be hung
Cable, Coaxial
A cylindrical assembly composed of conductor centered inside a metallic tube or shield, separated by a dielectric material, and usually covered by an insulating jacket.
