General Definitions and Requirements Flashcards
What is an Adjustable Speed Drive?
Power conversion equipment that provides a means of adjusting the speed of an electric motor.
What is Ampacity?
The maximum current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
What does AFCI stand for?
Arc-Fault Circuit Interrupter
What is the purpose of a AFCI device?
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.
What does Askarel mean?
A generic term for a group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating media.
define the term “Bonded (Bonding).”
it refers to connect or establish electrical continuity and conductivity.
What is a Bonding Conductor or Jumper?
A reliable conductor to ensure the required electrical conductivity between metal parts
required to be electrically connected.
What is the general purpose of the Branch Circuit?
A branch circuit that supplies two or more receptacles or outlets for lighting and appliances.
Define Coaxial Cable.
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.
What is Combustible Dust?
Dust particles that are 500 microns or smaller
What is Composite Optical Fiber Cable?
A cable containing optical fibers and current-carrying electrical conductors.
What is a connector, pressure (Solderless)?
A device that establishes a connection between two or more conductors or between one or more conductors and a terminal by means of mechanical pressure and without the use of solder.
define Continuous Load?
A load where the maximum current is
expected to continue for 3 hours or more
What is a Control Circuit?
The circuit of a control apparatus or system
that carries the electric signals directing the performance of the controller but does not carry the main power current.
Define Selective Coordination
Localization of an overcurrent condition to restrict outages to the circuit or equipment affected, accomplished by the selection and installation of overcurrent protective devices and their ratings or settings for the full range of available overcurrents, from overload to the maximum available fault current, and for the full range of overcurrent protective device opening times associated with those overcurrents.
What is a Cord Connector?
A fitting intended to terminate a cord to a box or similar device and reduce the strain at points of termination and may include an explosionproof, a dust-ignitionproof, or a
flameproof seal.
Explain the meaning of “Effective Ground-Fault Current Path”?
An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault
conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors.
Ground-Fault Circuit Interrupter (GFCI)
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 (trip current to ground: 6mA)
what is a Grounding Electrode?
A conducting object through which a
direct connection to earth is established
describe a hoistway?
Any shaftway, hatchway, well hole, or other vertical opening or space in which an elevator or dumbwaiter is designed to operate.
what is a Innerduct?
A nonmetallic raceway placed within a larger raceway.
What is a Neutral Conductor?
The conductor connected to the neutral point of a system that is intended to carry current under normal conditions.
define a Nonlinear Load
A load where the wave shape of the steady-state current does not follow the wave shape of the applied voltage.
what is the purpose of Oil Immersion?
Electrical equipment immersed in a protective liquid in such a way that an explosive atmosphere that may be above the liquid or outside the enclosure cannot be ignited.
