Abstract: A switchgear system includes a switchgear frame having an interior compartment and front opening and containing therein at least one electrical switchgear component. A truck carries an electrical component and is supported for movement on the switchgear frame. A drive mechanism connects the truck and is configured to rack in the truck into an electrically connected position with the at least one electrical switchgear component, rack out the truck from the electrically connected position into an electrically disconnected position, and rotate the truck upward from its disconnected position into a rotated position to allow operator access through the front opening to the at least one electrical component.

Abstract: An energized parts guard is disclosed comprising a panel of substantially rigid, electrically insulative material wherein the substantially rigid panel further comprises a first one or more apertures and a second one or more apertures. The first one or more apertures are so dimensioned to accept one or more circuit breakers inserted into the first one or more apertures such that there is less than a 12.5 mm gap between the panel and the circuit breaker on at least two sides of the one or more circuit breakers. The second one or more apertures are positioned to facilitate access to at least one terminal of each of the one or more circuit breakers when the one or more circuit breakers are inserted into the first one or more apertures.

Abstract: A remote control device may be mounted to a structure. The remote control device may include a control unit, a base, a faceplate, an adapter, and a mounting plate. The adapter may be configured to be attached to the faceplate. The adapter may be configured to be secured to the structure. The mounting plate may float between the adapter and the structure when the adapter is secured to the structure. The mounting plate may include a frame, a mounting tab, and a plurality of spring arms. The mounting tab may extend from the frame, for example, a platform on the frame. The mounting tab may be configured to prevent rotation of the base of the remote control device when the base is attached to the mounting plate. The plurality of spring arms may be configured to bias the mounting tab away from the structure.

Abstract: A connecting device may electrically connect an electric motor to an electronic switchgear unit. The connecting device may include a bus bar that has a first interface, a second interface, and a linear section therebetween, where the first interface is bowed in a direction at least partially transverse to a longitudinal direction of the linear section of the bus bar. The first interface may be configured to electrically connect to at least one line that conducts a drive current of the electric motor through a crimp connection, and the second interface may be configured to electrically connect to the electronic switchgear unit.

Abstract: A circuit breaker and panel system includes a panel including a base pan having a plurality of base pan electrical connections. A circuit breaker including a housing having a plurality of circuit breaker electrical connections arranged to contact the base pan electrical connections when the circuit breaker is coupled to the base pan. The circuit breaker is rotatably coupleable with the base pan via a pivot joint for engaging the plurality of base pan electrical connections with the plurality of circuit breaker electrical connections per a predetermined electrical connection coupling sequence. One of the housing and the base pan includes a protrusion and the other of the housing and the base pan includes a corresponding recess which, when engaged with each other, retain the housing to the base pan to prevent reverse rotational movement of the breaker with respect to the base pan.

Abstract: A bus bar arrangement for electrical equipment has at least one bus bar and a shroud. The shroud provides a fault free interface for personnel working with the electrical equipment. First and second shrouds mounted on opposing ends of the at least one bus bar surround a substantial portion of the at least one bus bar. The shroud provides a connection surface for the connection of a wide variety of circuit breakers thereon. The shroud provides protection against intruding objects and ease of connection between circuit breaker contacts and bus bar assemblies of electrical equipment.

Abstract: An equipment box assembly includes an open-ended housing and a support plate. The housing has a back wall and opposed sidewalls defining a cavity in the housing. The back wall includes a plurality of mounting features for mounting electronic components to the back wall. The housing is configured to be positioned in an installed position in a mounting surface such that the cavity is recessed in the mounting surface. The support plate includes a plurality of mounting features for mounting electronic components to the support plate. The support plate is releasably mounted in the housing cavity in a first position with the support plate generally parallel to and spaced apart a first distance from the back wall.

Abstract: Described herein are various embodiments of a power distribution unit having modular components. For example, according to one embodiment, a power distribution unit can include a component portion that comprises at least two modules including outlet modules, circuit protection modules, power input modules, communications I/O modules, and display modules. Each of the at least two modules of the component portion can comprise at least one connection element and can be removably secured to one or more other of the at least two modules via the connection elements. The power distribution unit can also include a housing that defines an interior cavity. The component portion can be removably secured to the housing at least partially within the interior cavity.

Abstract: Described herein are various embodiments of a power distribution unit having modular components. For example, according to one embodiment, a power distribution unit can include a component portion that comprises at least two modules including outlet modules, circuit protection modules, power input modules, communications I/O modules, and display modules. Each of the at least two modules of the component portion can comprise at least one connection element and can be removably secured to one or more other of the at least two modules via the connection elements. The power distribution unit can also include a housing that defines an interior cavity. The component portion can be removably secured to the housing at least partially within the interior cavity.

Abstract: A cab and method for assembling such for a machine are described. The cab may define an operator compartment. The cab may comprise a cab frame, a plurality of inner surfaces disposed inside the cab frame, a wiring harness, and a plurality of interfaces accessible through the apertures of the inner surfaces. A portion of the inner surfaces may include a plurality of apertures. The plurality of interfaces may be disposed in Interactive Locations and in Hidden Locations. The plurality of interfaces may include mounting interfaces and connection interfaces. The interfaces may be pre-located. The plurality of mounting interfaces may be configured to receive and position a plurality of Customized Equipment on the inner surfaces. The plurality of connection interfaces may be configured to matingly receive electrical connectors from the Customized Equipment and to operably connect the Customized Equipment to the wiring harness.

Abstract: A power supply apparatus for a vehicle is provided which supplies electric power to a power supply unit and charges electric power from the power supply unit via a power port. The vehicle includes a plurality of power inverter circuits which are connected to a common storage unit in parallel. The plurality of power inverter circuits include an electric power transferring power inverter circuit connected to the power port via an electric power transferring electric path, and are divided into a first category including the electric power transferring power inverter circuit and a second category. The power supply apparatus includes a connection prohibiting unit which realizes a state in which the power inverter circuit included in the first category is electrically connected to the storage unit, and the power inverter circuit included in the second category is disconnected from the storage unit.

Abstract: A power transfer device adapted for interconnection with the electrical system of a building includes a housing that includes a base having a back wall and an intermediate member that engages the base. A first housing section engages the base and the intermediate member and defines a first interior portion. A second housing section engages the base and the intermediate member and cooperates with the base to define a second interior portion. Fasteners secure the intermediate member, the first housing section and the second housing section together. Power transfer switching components are interconnected with and carried by one of the housing sections. A cover may be pivotably mounted to the housing. During assembly, the power switching components are mounted to one of the housing sections to form a subassembly that is connected to the base as a single unit.

Abstract: A sealed electrical enclosure for housing an electrical component is provided. In one exemplary embodiment, the sealed electrical enclosure includes a housing, a first and second electrical connector, an actuator, and a terminal. The housing has a sealed interior when a top portion is coupled to a bottom portion. The first electrical connector extends from the sealed interior through the bottom of the housing and is electrically coupled to the electrical component. The actuator extends from the sealed interior through the housing and is configured to manipulate the electrical component. The terminal is electrically coupled to the second electrical connector. The second electrical connector is configured to mate with the first electrical connector. The first and second electrical connectors are configured to be connected and disconnected to attach and remove the housing to and from the terminal.

Abstract: A combination emergency panelboard includes a relay section and a circuit-breaker section. The relay section includes automatic load control relays and the circuit-breaker section includes emergency circuit breakers. A dielectric barrier is positioned between the relay and circuit-breaker sections to separate them. A busbar is positioned in the circuit-breaker section for distributing a phase of emergency current to a plurality of emergency circuit breakers coupled thereto. A plurality of automatic load control relays is positioned in the relay section. Each of the relays is electrically connected to a respective one of the plurality of emergency circuit breakers for distributing the phase of emergency current to a respective load.

Abstract: A power transfer device adapted for interconnection with the electrical system of a building includes a housing that includes a base having a back wall and an intermediate member that engages the base. A first housing section engages the base and the intermediate member and defines a first interior portion. A second housing section engages the base and the intermediate member and cooperates with the base to define a second interior portion. Fasteners secure the intermediate member, the first housing section and the second housing section together. Power transfer switching components are interconnected with and carried by one of the housing sections. A cover may be pivotably mounted to the housing.

Abstract: An apparatus includes a first shutter, a first pivot arm having a first end and a second end, wherein the second end is disposed in mechanical communication with the first shutter, a second shutter, and a second pivot arm having a first end and a second end, wherein the second end is disposed in mechanical communication with the second shutter and the first end is disposed in mechanical communication with the first end of the first pivot arm. Linear movement of the first ends of the first and second pivot arms results in linear movement of the first shutter and the second shutter.

Abstract: A transfer switch enclosure is provided for housing a transfer switch that selectively connects a load to either a utility electrical grid or a stand-by electrical generator. The utility connection includes a first switch selectively connecting utility power to a load. The transfer switch selectively connects the load to either the utility power or a secondary power source. The housing includes a divider panel, providing two separate chambers in the housing. The utility connection is mounted in one of the chambers and the transfer switch is mounted in the other of the chambers. The divider panel includes an opening to permit a pair of electrical conductors to pass therethrough for connecting the utility switch to the transfer switch. The housing further includes two door panels, each door panel covering one of the two chambers. Each door panel is independently operable and securable, controlling access to each of the two chambers.

Abstract: A power transfer device adapted for interconnection with the electrical system of a building includes a cabinet, a set of switches mounted to the cabinet, and wires adapted to connect the switches to an electrical distribution panel associated with a building electrical system. The power transfer device includes a first compartment and a second compartment partitioned from one another by a removable intermediate wall that slidably engages a base that defines a back wall of the cabinet. A first panel closes the first compartment and a second panel is adapted to selectively close the second compartment. The lower compartment provides an interior cavity in which electrical connection between a set of lead wires, connected to the switches, and power input wires can be made.

Abstract: An electrical connector enclosure which includes a framework having at least one wall, and which at least partly defines an internal cavity; and a moveable panel mounted on the framework, the panel being moveable between an open position and a closed position relative to the internal cavity, and wherein the at least one wall and the moveable panel cooperate to define a conductor aperture when the moveable panel is located in the closed position relative to the internal cavity.

Abstract: Panelboard assemblies that are configurable by the end user to accommodate user selected fusible switching disconnect devices of different ratings and sizes. Deadfront interfaces are made possible with terminal covers independently operable from a panel door and a reconfigurable branch circuit enclosure cover. An integral load side disconnect switch facilitates selective coordination of feeder circuit loads, and increased interrupting ratings per volume are made possible.

Abstract: A circuit breaker assembly includes a housing, an electrical bus structure coupled to the housing, and a number of first plug-in members coupled to the electrical bus structure. A number of circuit breakers include a first surface and a second plug-in member disposed opposite the first surface. The second plug-in member of each of the number of circuit breakers is mated with a corresponding one of the number of first plug-in members. A plate member is removably coupled to the housing. The plate member includes a first surface and an opposite second surface. The first surface of the number of circuit breakers engages the opposite second surface of the plate member in order to maintain mating of each of the number of circuit breakers with the corresponding one of the number of first plug-in members.

Abstract: An exemplary encapsulated high-voltage switch is disclosed which contains a heat-generating current conductor, a metal encapsulation surrounding the current conductor, and a cooling element. A cooler of the cooling element is fixed on a part of the encapsulation that is embodied as a mounting plate, and has cooling ribs arranged outside the encapsulation. In a section of the cooler that is embodied as a cooling block, at least a portion of the cooling ribs is arranged parallel to the mounting plate and is held on a heat distributor fixed to the mounting plate in such a way that on both sides of the heat distributor in each case one of two groups of cooling channels arises, in which the cooling channels are in each case arranged in the manner of a sandwich. The cooling channels can, for example, be oriented in a manner inclined relative to a horizontal axis of the switch.

Abstract: An electrical power distribution assembly for providing enhanced access includes a first member configured to be mounted to a fixed structure. A second member is configured to receive electrical components for interconnection to electrical systems of a predetermined configuration. The second member is movably connected to the first member between a first position and a second position. The movable connection providing enhanced access of electrical components disposed on the second member around the fixed structure when the second member is disposed in the second position.

Abstract: A transfer switch enclosure is provided for housing a transfer switch that selectively connects a load to either a utility electrical grid or a stand-by electrical generator. The utility connection includes a first switch selectively connecting utility power to a load. The transfer switch selectively connects the load to either the utility power or a secondary power source. The housing includes a divider panel, providing two separate chambers in the housing. The utility connection is mounted in one of the chambers and the transfer switch is mounted in the other of the chambers. The divider panel includes an opening to permit a pair of electrical conductors to pass therethrough for connecting the utility switch to the transfer switch. The housing further includes two door panels, each door panel covering one of the two chambers. Each door panel is independently operable and securable, controlling access to each of the two chambers.

Abstract: An electrical switching apparatus mounting apparatus includes a base with a planar portion having a first side and an opposite second side. A number of first adjustable members are coupled to the opposite second side. Each of the first adjustable members includes a first end and an opposite second end. A number of second adjustable members are coupled transverse to the first adjustable members and include a first end and an opposite second end. At least one of the first end and the opposite second end of at least one of the first adjustable members and the second adjustable members is adjustable generally toward or generally away from the base. At least one of the first end and the opposite second end of the at least one of the first adjustable members and the second adjustable members is coupled to a number of walls of a switchgear enclosure.

Abstract: At least one embodiment of the invention provides that, for a closing apparatus for a part rack withdrawable via V-shaped rod assemblies, the closing apparatus includes at least one pin formed on rod assemblies or as part of them, each pin engaging in a slot in an actuating element. Owing to the use of the slots, the actuating element can be formed as a rigid body, with the result that no frictional forces need to be overcome when inserting a circuit breaker into a withdrawable-part rack with the closing apparatus according to at least one embodiment of the invention. With the closing apparatus according to at least one embodiment of the invention, a locking element can have a particularly simple design: it can be guided in the actuating element.

Abstract: A power distribution system is provided that includes an upper panel, a lower panel, a plurality of side panels, and a plurality of guide rails each having at least two insert slots formed therein that extend along a longitudinal axis of the guide rail. Each of the insert slots is configured to receive and fixedly hold an edge of the side panels. The upper panel and lower panel are each fixedly mounted to an opposite edge face of the guide rails thereby securing the side panels and guide rail between the upper panel and lower panel.

Abstract: An electrical enclosure for circuit breakers includes a busbar with a plurality of apertures equidistantly positioned along a length of the busbar so that insulating inserts and corresponding busbar connectors can be attached to the busbar to receive variously sized circuit breakers having different widths equal to an integer multiple of the center-to-center distance between the equidistantly positioned apertures.

Abstract: Aspects of the inventive technology may relate to a physical enclosure designed to house electrical componentry inside. More specifically, the inventive technology may relate to a physical enclosure that is designed to allow for the enclosure, perhaps within the same, unitary structure, of conductors (wires) as they enter the ground and wire splice devices that connect those wires with wires of smaller diameter. Aspects of the inventive technology may relate to provision of a wire splice mount(s) that hold splices in fixed position relative to the physical enclosure.

Abstract: A switching system includes switchgear that can be contacted via pin contacts. In at least one embodiment, the switching system is provided with pin contacts and mating pin contacts and at least one device(s) for the transmission of force onto the switchgear, thereby allowing to establish and interrupt contact to the switchgear even when only little space is available.

Abstract: A load control device is adapted to be installed in an electrical wallbox having a barrier. The load control device comprises a split enclosure having first and second enclosure portions spaced apart so as to define a gap, such that the gap is adapted to receive the barrier of the electrical wallbox when the load control device is installed in the wallbox. First and second connectors are provided in first and second openings of the first and second enclosure portions, respectively. The load control device is operable to receive a first control signal at the first connector and to generate a second control signal, which is provided at the second connector, in response to the first control signal.

Abstract: An electric power distribution panel includes a plurality of slots for supplying power to circuit breakers, a first input bus for coupling to a first power source, a second input bus for coupling to a second power source, and a plurality of circuit breaker carriers. Each carrier is positioned in one of the slots and selectably movable in its slot between a first position for coupling a circuit breaker to the first input bus, and a second position for coupling a circuit breaker to the second input bus.

Abstract: A panelboard for fusible switching disconnect devices. The panelboard includes a chassis coupled to a mounting enclosure. The mounting enclosure can be used indoors or outdoors. The chassis is configured to receive one or more fusible switching disconnect devices. Each of the fusible switching disconnect devices includes both a fuse and a circuit breaker-like disconnect in a single, relatively compact housing. The compactness of the housing allows the panelboard to provide a higher level of overcurrent interruption in a smaller sized mounting enclosure than conventional panelboards. For example, the panelboard can have an interruption per volume rating of at least about 33 amps per cubic inch, as compared to about 2 amps per cubic inch for most conventional panelboards.

Abstract: A load control device is operable to receive a first control signal having a first magnitude and to generate a second control signal having a second magnitude. The load control device is adapted to be installed in an electrical wallbox having a barrier. The load control device comprises a split enclosure having first and second enclosure portions and a gap between the two portions. A first connector is provided in an opening of the first portion for receipt of the first control signal and a second connector is provided in an opening of the second portion for providing the second control signal. The gap of the split enclosure receives the barrier when the load control device is installed in the electrical wallbox, such that the first control signal is electrically isolated from the second control signal. Accordingly, the load control device meets the requirements of the National Electrical Code when installed in the electrical wallbox.

Abstract: A switching installation (5) having a circuit breaker (12), which is connected to a cable connection (33), and optionally a disconnector (14) for making or breaking a conductive connection between the cable connection (33) and a rail system (15), and an electrically insulating barrier (10). The electrically insulating barrier (10) surrounds at least the parts which are under electric voltage in operation from the circuit breaker (12) to the rail system (15), including a branch (18) leading to a rail (15) of the rail system, separately for each phase of the switching installation (5). Furthermore, inside the electrically insulating barrier (10) the switching installation may be provided with field-control means and/or voltage-sealing means (22, 25, 37).

Abstract: An adapter is for mounting an electrical switching apparatus, such as a circuit breaker, on the back panel of an enclosure, such as a switchgear cabinet. The back panel has at least one aperture. The adapter includes a first end portion coupled at or about the aperture of the back panel, an engaging portion engaging and securing the circuit breaker to the adapter, a fastener, and a second end portion disposed distal from the first end portion and including an elongated slot. The elongated slot receives the fastener in order to couple the adapter to the back panel when the fastener is fastened, while enabling adjustment of the adapter and the circuit breaker coupled thereto, with respect to the back panel, when the fastener is unfastened. The first end portion, the engaging portion and the second end portion form a single piece adapter. An enclosure assembly is also disclosed.

Abstract: The present invention which provides for a consolidated circuit breaker support insulator and bus alignment piece having a molded body and at least one horizontal bus. Preferably, there are three horizontal buses. Each horizontal bus is structured to extend between, and be in electrical communication with, a socket bus horizontal terminal and a vertical conductor. The molded support includes a non-conductive body has a vertical plate member and a horizontal plate member.

Abstract: A company switch-type of electrical switchgear is disclosed having improved safety characteristics and having a reduced profile. The electrical connections are typically all enclosed in one area facing one direction such that access to the connections can be controlled and interlocked with one or more main breakers. By enclosing the connections in one area and directing the leads out of the enclosure in one direction, the size of the enclosure can be reduced while the safety of its use is increased.

Abstract: A company switch-type of electrical switchgear is disclosed having improved safety characteristics and having a reduced profile. The electrical connections are typically all enclosed in one area facing one direction such that access to the connections can be controlled and interlocked with one or more main breakers. By enclosing the connections in one area and directing the leads out of the enclosure in one direction, the size of the enclosure can be reduced while the safety of its use is increased.

Abstract: A breaker distribution module is disclosed. The breaker distribution module essentially includes an insulation rod, a plurality of output terminals, a plurality of input busbars and a plurality of breakers. The insulation rod is composed of a plurality of insulation blocks. The output terminals are disposed on the insulation rod. The breakers connect to the output terminals and the input busbars. Each of the breakers corresponds to one of the output terminals. In addition, the insulation rod can also be manufactured as an integrative unit, and the breaker distribution module further includes a connection busbar electrically coupled to the input busbars. The design of the pluralities of insulation blocks decreases the fabricating cost. In addition, the connection busbar is able to change the output voltage disposition of the breaker distribution module.

Abstract: To permit the locking of a displaceable door (1), comprising a door frame (2, 3, 4, 5, 6), which gives the door mechanical stability and a door leaf (3), which is attached to the door frame (2, 3, 4, 5, 6), the door leaf (8) is configured so that it can be displaced in relation to the door frame (2, 3, 4, 5, 6). The door leaf (8) is allocated first locking elements (12a, b), which can be locked and unlocked with second locking elements (12c, d) that are allocated to the switchgear cabinet frame by the displacement of the door leaf (8).

Abstract: A front mount circuit breaker assembly for circuit breakers of different dimensions that are removably mounted to modular circuit breaker holder members. Elongated contacts extend from the terminals on the back of the circuit breakers to the front. The holder members have a through portion between the two ends. Below the two ends and inwardly, a supporting surface is defined for supporting electrical contacts where the distal ends of the elongated contacts are removably mounted to provide the electrical connection for the device. These connections have been brought to the front. The elongated contacts can be made of different dimensions that cooperate with those of the circuit breaker. The holder members are banked together and removably mounted over a cooperating longitudinal rib that is received within a bay cut out defined on the flat bottom wall of the holder members in one of the embodiments. Another embodiment includes outwardly extending flanges for ready mounting to a panel.

Abstract: An electrical functional device for use in the field of aviation, for example, a safety switch, is described. The functional device has a housing out of which a cylindrical fixing neck projects. The fixing neck contains, on an outer circumference thereof, a fine-pitch threading for screwing on a nut, and carries, at a distance from the end thereof that is attached to the housing, a radially protruding bearing flange. The bearing flange serves to hold the device in a fixed position, in which the fixing neck projects through a fastening hole of a wall element and is held therein against the bearing flange by a nut. The fixing neck is a one-piece part made out of plastic. It contains, between the end of the threading thereof and the bearing flange, an unthreaded shaft area, which is coaxial in relation to the fixing neck.

Abstract: In an assembling structure of a vehicle center cluster, plural electrical devices are detachably assembled to a holding member to be removed from an inside of a passenger compartment while the holding member is fixed to a dashboard. Therefore, for example, when a CD deck is removed from the center cluster into the passenger compartment among the electrical devices, only the CD deck can be removed from the holding member into the passenger compartment without removing the other electrical devices, in a fixed state of the holding member to the dashboard. Accordingly, removing operation of the electrical devices can be made simple.

Abstract: A modular furniture wall system includes active telecommunications equipment and wire management in an open office architecture and effectively provides a telecommunications closet as part of the office furniture. Slip-fit styled U-shaped members are attached to vertical frame members which form a rectangular opening within the furniture frame. L-shaped members are adjustable connected to each other and between the U-shaped members for providing a channel for routing wire between extending legs of the L-shaped members and a spaced support for the mounting of standard electrical equipment. Opposing pairs of shelf elements are carried by opposing surfaces of the U-shaped member and the L-shaped member, respectively, with each of the opposing pair of shelf elements having a horizontal surface for supporting equipment such as active telecommunications switches, patch panels and cross-connects with their front surfaces facing upward.

Abstract: A light leakage preventing structure of a combination meter includes: a plurality of scale plates being arranged so that their edges face each other with a gap being provided therebetween; and a light shielding member to be mounted to rear surfaces of facing portions of the edges. In the structure: the edges of the facing portions of the scale plates are formed into a flat plate shape; and the light shielding member has a dark space opened towards the facing portions.

Abstract: An instrument panel unit for easily assembling a number of parts by eliminating instrument panel sublines, wherein the instrument panel is provided with a plurality of windows on a front wall thereof, a first fixture guide is attached to a position where corresponds to the respective windows at the back of the front wall, a second fixture guide is respectively attached at the back of the front wall of the instrument panel, function parts, such as center displays, second displays at the driver seat, and safety functions such as an air bag system at passenger seat, are installed in the respective windows of the instrument panel unit, control parts are also accommodated in the instrument panel unit for controlling the function parts, and a circuit element is provided within the instrument panel unit along the back of the front wall, which circuit element has branches extending to the first and second fixture guides and connecting the function parts and the control parts with each other through connectors attache

Abstract: A support and electrical power supply device comprises a mounting plate supporting an electrical switchgear apparatus and housing branch conductors extending perpendicularly to a busbar. The branch conductors present identical lengths. The connection strips are arranged close to the opposite terminal parts of the branch conductors and comprise orifices arranged symmetrically with respect to the horizontal midplane of the mounting plate to enable fitting of the connection parts with the lineside terminals or the loadside terminals of the switchgear apparatus. Two connection possibilities of the switchgear apparatus are possible at the time of installation to achieve a lineside or a loadside power supply. The same mounting plate can also be used for supply of a single switchgear apparatus or of two switchgear apparatuses with opposite feeders.

Abstract: An attachment for attaching a main circuit breaker in an electrical panel has a uniquely constructed hold-down for the circuit breaker and a headed screw for fastening the hold-down in the panel. The hold-down is a non-electrically conductive part, such as a plastic. A circuit-breaker-engaging projection for engaging a circuit breaker projects from a first side of the hold-down body and a gripping tab projects from a second side of the body opposite the first side. A shank of the headed screw passes through a through-hole in the hold-down body to thread into a hole in a base pan. The screw is tightened against the hold-down body to hold it, and in turn the main circuit breaker, in place. In such an installed condition, the main circuit breaker cannot be removed easily from the panel unless the screw is intentionally unscrewed by a tool sufficiently to allow movement of the hold-down to a position that enables the main circuit breaker to be removed.

Abstract: A circuit breaker panelboard enclosure is adapted to receive circuit breaker covers that are attached to the interior or circuit breaker module without requiring attachment screws and the like. The circuit breaker modules within the enclosure are equipped with electrically-insulative extension clips that are received and retained within apertures formed in the circuit breaker covers in press-fit relation. The circuit breaker covers are removed by grasping the ends of the circuit breaker covers and pulling the circuit breaker covers away from the enclosure.