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