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C,S,&P III - Lesson 9

Horizontales
A single panel or group of panel units designed for assembly in the form of a single panel, including buses and automatic overcurrent devices, and equipped with or without switches for the control of light, heat, or power circuits; designed to be placed in a cabinet, enclosure, or cutout box placed in or against a wall, partition, or other support; and accessible only from the front
_____________ circuit breaker is a qualifying term indicating that the circuit breaker does not have any adjustment to alter the value of the current at which it will trip or the time required for its operation
An assembly completely enclosed on all sides and top with sheet metal (except for ventilating openings and inspection windows) 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
An overcurrent protective device with a circuit-opening fusible part that is heated and severed by the passage of overcurrent through it
A ______rated combination is a specific circuit breaker/circuit breaker combination or fuse/circuit breaker combination that can be applied at available short-circuit current levels above the loadside (protected) circuit breaker’s interrupting rating, but not above the lineside (protecting) device’s interrupting rating
An assembly of buses and connections, overcurrent devices, and control apparatus with or without switches or other equipment, installed in a cabinet, cutout box, or enclosure suitable for a panelboard application.
_________ ____ circuit breaker is a qualifying term indicating that no delay is purposely introduced in the tripping action of the circuit breaker
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
Verticales
_______ ____ circuit breaker is a qualifying term indicating that there is a delay purposely introduced in the tripping action of the circuit breaker, and the delay decreases as the magnitude of the current increases
__________ circuit breaker is 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
The highest current at rated voltage that a device is identified to interrupt under standard test conditions
The ____-_____ Current Rating is the prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected without sustaining damage exceeding defined acceptance criteria
A _____ rated OCPD system is one that has all the individual OCPD individual interrupting ratings equal to or greater than the available short-circuit current at their line terminals per 110.9
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