Abstract: The invention relates to a device for connecting conductors devices to a busbar of a busbar system in which the busbar has an n-agonal cross-section (n.gtoreq.3) with longitudinal undercut acceptor grooves in its outer sides. A simple type of connection is provided in that the acceptor grooves are T-shaped, mating electrically conductive inserts extending over part of the length of the busbar can be fitted into the undercut rectangular cross-section parts of the groves and the inserts have connectors projecting from the section to which the conductors can be directly connected or devices can be fitted by ways of connecting contacts.

Abstract: Hollow risers in switchgear are preferably formed by a confronting pair of spaced apart U-channels. Stab conductors for connecting switching apparatus in the switchgear to the risers have a pair of flat members straddling and secured to the two U-channels by mounts which include backing plates bearing against the inner surfaces of the confronting legs of two U-channels and bolts extending through the stab conductors and U-channel legs and engaging threaded apertures in the backing plates. To accommodate a range of current ratings, the confronting channels can have first and second leg thicknesses t.sub.1 and t.sub.2, which can be different but the outer widths of the channels are all the same. The backing plates have a first surface with a third thickness in one section and a fourth thickness in a second section. This first surface bears against the U-channel legs when the legs are of different thicknesses and t.sub.1 plus t.sub.3 is made equal to t.sub.2 plus t.sub.4.

Abstract: The present invention provides a reliable high current connector for connecting the ground and power planes of a first PCB to the ground and power planes of a second PCB. The power bus bar is comprised of a first conductive structure having a first and second surface, a second conductive structure having a first and second, and an inner insulative structure positioned between the first surface of the first conductive structure and the first surface of the second conductive structure. A fastening means, inserted through openings in the conductive structures, provides a secure, low resistance electrical connection from the first or second conductive structure of the bus bar to the electrical traces of the PCB. The high dielectric constant of the insulator provides distributed capacitance between the first conductive structure and the second conductive structure, lowering the AC impedance.

Abstract: Angle members forming the vertically extending supply buses in a meter center have arcuate offsets so that flanges on the ends of horizontally extending tenant buses form tenant stab contacts which are vertically aligned with supply stab contacts on straight sections of the outwardly projecting flanges of the supply bus angle members. Meter socket assemblies have double ended fastenerless meter jaws one pair of which plug onto the supply bus stab contacts and another pair of which plug onto the tenant bus stab contacts, and into which the meters are plugged. The double ended fastenerless meter jaws are fabricated from a pair of elongated flat members having end sections bent back on and diverging from straight center sections, and terminal sections which extend toward each other from the end sections and converge slightly toward the center sections. Spring clips clamp the terminal sections of the pair of elongated members in compliant confronting relationship to form the double ended fastenerless meter jaws.

Abstract: An electric load center having a basepan having a surface with a modular extension mounting foot extending from a lower end wall of a circuit breaker support rail for receiving a modular extension basepan, the mounting foot having a trapezoidal shaped slot for engagement by a correspondingly shaped ramp of the modular extension basepan, the modular extension mounting foot further having a slot for receiving a flexible snap hook of the modular extension basepan to secure the modular extension basepan to the basepan.

Abstract: A power module is basically formed of a circuit block, a resin casing surrounding the circuit block, and circuit terminals. The circuit block has a metal base, an insulative substrate disposed on the metal base, and a plurality of circuit parts mounted on the insulative substrate. The resin casing is connected to a periphery of the metal base. The circuit terminals have terminal frames at least partly molded in the resin casing. At least one of the terminal frames has an insertion hole therein to receive an insert pin of a mold. Thus, one of the terminal frames is held in position in the mold by the insert pin of the mold during molding. The power module has an improved terminal wiring structure which stabilizes the quality and improves the reliability of the integral resin casing incorporated with the terminals inserted to the resin casing by insert-molding.

Abstract: To reduce the number of components contained in an electric junction box, an electric junction box containing a bus bar therein includes a connecting area formed integrally on a portion of the bus bar while a complimentary connecting area provided on the lower case cooperates with the connecting area of the bus bar. The bus bar is arranged on the upper surface of the lower case with the connecting areas firmly fastened to each other, with the bus bar being directly fastened to the lower case. The upper cover is placed on and fastened to the lower case while the bus bar is connected to the lower case, thereby making the use of an upper case unnecessary.

Abstract: A device adapter for pluggable connection to busbars of a busbar system with terminal connectors disposed in an oblong adapter housing and having catches for securing on a lower securing element and a section of a top hat rail for placing a device thereon. The adapter housing is divided into two halves in a longitudinal direction and parallel to an attachment direction. On their facing sides, the housing halves support securing elements distributed in the longitudinal direction over a separating plane, but offset in a step-like manner transversely thereto for securing, fixed against relative rotation, a plurality of U-shaped flat plug connectors, thereby enabling the pluggable connection. The housing halves are connected to each other and the U-shaped flat plug connectors are connected by conductors to terminal connectors housed in a contact block or directly to the device to be placed thereon.

Abstract: A plurality of bus bars 3 are mounted in a housing 1, and a plurality of reception portions 2A.sub.1, 2A.sub.2 and 2A.sub.3, provided in one side of the housing 1 for receiving a mating connector K, are staggered in a stairs-like manner relative to reception portions 2B.sub.1, 2B.sub.2 and 2B.sub.3 provided in the other side of the housing. With this arrangement, connection pins 5, 5', extending in a branched manner from the bus bars 3, project respectively into the same positions in the associated reception portions 2, and even if the mating connector K is fitted in any of the reception portions 2, metal terminals 6 of the mating connector K are connected respectively to the predetermined connector pins 5, 5'.

Abstract: A method for the realisation of electrical connections is set forth, characterized in that it consists in providing at least two conducting elements (1) which are provided with connection lips (2); removing a number of these connection lips (2) depending on the desired connections; applying the conducting elements (1), which are mutually electrically insulated, one above the other; and applying the remaining connection lips (2) to connectors (7) depending on the desired connections.

Abstract: The invention relates to an adapter for bus bar systems with a base element (1, 8, 9, 10) equipped with attachment feet (8, 9, 10) to mount the base element onto the bus bars (11) in a mounting direction (B) perpendicular to the longitudinal direction (A) of the bus bars; with an automatic locking mechanism of the base element onto the bus bar system by means of a locking part (26) contained within the base element. In order to ensure a secure connection between the bus bar system and the adapter in the longitudinal direction of the respective bus bar, the invention suggests that the locking part provide a cutting-edge (27) positioned in the mounting direction to obtain an incisive engagement with one of the bus bars when mounting the base element.

Abstract: A busway elbow fitting for a busway electrical distribution system. The elbow includes a first straight busway section having a housing and a plurality of electrical busbars enclosed within the housing. The first straight section has one standard terminating end and one mitered end wherein the housing and the busbars are cut to a predetermined angle with respect to the first straight section. The elbow also includes a second straight busway section having a housing and a plurality of electrical busbars enclosed within the housing. The second straight section has one standard terminating end and one mitered end wherein the housing and the busbars are cut to a predetermined angle with respect to the second straight section. The mitered ends of the first and second busway sections are complementary such that when the mitered ends are placed in juxtaposed position a desired angle is formed between the first and second busway straight sections.

Abstract: A conductor for a connection circuit includes a first conductor band formed in a linear shape and having a base plate and a connection terminal upright at its end and a second conductor band having a base plate and connection terminal extending through a step-like bending conductor and a connection terminal upright at its end are arranged in parallel. The connection terminals of the first conductor band and the second conductor band are opposite to each other. The relative positions of the first and the second conductor band can be adjusted by setting the length of the step-like bending portion for any optional value. The distance between the first conductor band and the second conductor band can be adjusted by bending the base plate portion of the second conductor band in a U-shape.

Abstract: A potential distributor is disclosed which comprises a two-layer, flat base rail having a plurality of flat plug tongues which project from the base rail and are oriented transversely with respect to the course of the rail. The two layers of the base rail are made from two folded limbs of an integral strip which are pressed flat against one another. Catch parts on the outer edges of the two folded limb located in longitudinally staggered relationship are used to produce a third layer of sheet metal material in the base rail. Extensions of the edge parts are bent and produce the flat plug tongues.

Abstract: A branch joint box includes upper and lower casings of an identical shape which form a casing assembly by overturning one of the upper and lower casings. First connector portions and second connector portions are arranged in a plurality of rows and having first terminal holes and second terminal holes, respectively. Bus bars each have a coupling portion accommodated in the casing assembly and first and second terminal portions extend from opposite sides of the coupling portion, respectively, and project out of the first and second terminal holes, respectively. The upper and lower casings have first and second locking portions engageable with each other and are disposed at one side of the first and second connector portions, respectively.

Abstract: A joint terminal for bus bars and a method for manufacturing same from a concatenated strip of terminals. A plurality of female-female terminals having bus bar engaging portions at lower portions thereof are united together through a uniting strip and removed as desired to be connected to the bus bars via the engaging portions.

Abstract: An electrical assembly includes a housing containing a plurality of electrical components constituted by blocks, each block having a bus-bar and a protruding electrical connection. The electrical connections coincide substantially at the centre of the housing in a stack and are fastened together to directly connect the bus-bars. Preferably, the electrical connections are connected by a screw and bolt fastener passing through aligned apertures of the connections.

Abstract: A branch joint box comprising: a base plate; and a pair of connector coupling portions which are, respectively, formed on opposite faces of the base plate so as to confront each other; the base plate being formed with a plurality of insertion openings for inserting therethrough bus bars each including an elongated base portion and at least one pair of tabs extending from opposite sides of the base portion, respectively; the insertion openings extending through the base plate so as to communicate the connector coupling portions with each other; wherein the bus bars are secured in the insertion openings, respectively such that the tabs project into the connector coupling portions, respectively.

Abstract: A three-phase electrical power distribution busway having neutral busbars configured to have a higher current carrying capacity than each of the phase busbars of the busway is described, The neutral busbars have a combined cross-sectional area which is greater than the cross-sectional area of each of the phase busbars. The neutral busbars have a rectangular cross-section configured to reduce the skin effect and reduce ohmic heating caused by increased neutral busbar currents resulting from non-linear loads.

Abstract: A construction for fixing a bus bar for miniature fuses to an electrical connection box, in which the miniature fuses attached to the electrical connection box in parallel with each other at a short interval are connected to the bus bar accommodated in the electrical connection box, comprising: tabs which project from a base portion of the bus bar in parallel with each other at the short interval so as to be connected to the miniature fuses, respectively; a pair of extension portions which extend from opposite ends of the base portion of the bus bar beyond positions for providing the tabs on the bus bar, respectively; a pair of engageable portions which are provided on the extension portions, respectively; and a pair of mating engageable portions which are engageable with the engageable portions, respectively and are provided on the electrical connection box.

Abstract: An electrical power distribution busway system which includes a housing having side channels and top and bottom channels is described. The channels enclose and secure at least one stack of conductive busbars in place. At least one of the top or bottom housing channels is adjustably mounted between the side channels so the overall housing may be adjusted to accommodate various arrangements of busbars or busbars having different thicknesses. In a preferred form of the invention, the adjustable channels include holes which are aligned with elongate slots through the side channels. Fasteners extending through the aligned holes and slots allow the adjustable channel to be moved and fixed at different locations along the elongate slot.

Abstract: A circuit breaker has a line terminal comprising a pair of vertically spaced resilient terminal strips which extend in the transverse horizontal direction out from the breaker's housing to free ends of the strips, and which strips have formed therein near those ends respective bends disposed opposite each other and vertically projecting away from each other to bound opposite sides of a circular cylindrical cavity defined between those strips. A horizontal rail for conducting current is aligned in its lengthwise direction normal to those strips, and the rail has a flange received in the cavity in electromechanical contact with the strips, and also, a web extending in the transverse horizontal direction from the front flange out beyond the terminal to a rear flange for the rail. The shape, size and mass of the rail promote reduction of the temperature generated at the line terminal by the inrush of current carried by the rail in the presence of a short circuit in the load served by the breaker.

Abstract: Branch connection busbars to be firmly installed in upper and lower cases each have upper and lower series of branched tabs projecting upwardly and downwardly from the upper and lower lateral edges of the busbar, respectively, through tab connecting portions, with the upper and lower series of branched tabs staggered. The upper and lower cases are each provided at their opposing contact surfaces with seats. The branch connection busbars are first installed into the lower case with the upwardly projecting branched tabs held firmly by the seats of the lower case. At the same time the downwardly projecting branched tabs are passed through tab insertion holes in the lower case. As the upper case is assembled onto the lower case, the upwardly projecting branched tabs are inserted into the tab insertion holes in the upper case and the seats of the upper case are held against the bottom of the downwardly projecting branched tabs.

Abstract: Branch connection busbars to be firmly installed in upper and lower cases each have upper and lower series of branched tabs projecting upwardly and downwardly from the upper and lower lateral edges of the busbar, respectively, through tab connecting portions, with the upper and lower series of branched tabs staggered. The upper and lower cases are each provided at their opposing contact surfaces with seats. The branch connection busbars are first installed into the lower case with the upwardly projecting branched tabs held firmly by the seats of the lower case. At the same time the downwardly projecting branched tabs are passed through tab insertion holes in the lower case. As the upper case is assembled onto the lower case, the upwardly projecting branched tabs are inserted into the tab insertion holes in the upper case and the seats of the upper case are held against the bottom of the downwardly projecting branched tabs.

Abstract: A bus bar carrying electrical plug connector (2) for mating with a receptacle connector (4) mounted to float in the back panel (P2) of a drawer containing a power supply distribution module, comprises the rear insulating housing member (6), a bus bar and contact assembly (8) and a front insulating housing member (10). The bus bar assembly (8) comprises bus bars (32) from a forward longitudinal edge of each of which projects a socket contact (34), the opposite edge of each bus bar (32) being formed with a notch (40). The rear housing member (6) has a back wall (12) provided with a row of alternating merlons (28) and ribs (30). The front housing member (10) has through cavities (52) each for receiving a respective contact (34) and rearwardly opening slots (60) communicating with the cavities (52) for receiving the bus bars (32).

Abstract: A branch junction box having an upper case and a lower case, with a plurality of connector insertion portions provided on the upper case. A plurality of parallel busbar accommodating grooves are formed in the lower case. A plurality of busbars are installed in the busbar accommodating grooves and have branched tabs which project upwardly via tab connecting portions into the connector insertion portions. The tab connecting portions include a rising piece extending upwardly from one edge of the busbar and a tab connecting piece extending laterally on one or both sides of the rising piece. The tab connecting pieces are bent at right angles to the plane of the busbar so that the branched tabs on the connecting pieces protrude sideways from the busbar. The tab connecting pieces are formed with the upwardly projecting branched tabs.

Abstract: A power take-off assembly utilized in electric power distribution systems includes stabs, multi-surface conductor connectors, conductive straps, and a circuit breaker. The multi-surface connection conductors and straps each consist of a single copper or aluminum piece that facilitates electrical connection between the circuit breaker disposed within the power take-off assembly and the receiver stabs. The receiver stabs protrude from the power take-off assembly and engage with the power source thereby providing electric power to the circuit breaker.

Abstract: A protective casing for preventing any accidental introduction of metal parts into a column containing an array of electric distribution busbars is made up of two identical insulating half-casings (3) coupled together by interengagement of external engagement regions (18A, 20A, 22A, 24A) and of internal engagement regions (18B, 20B, 22B, 24B) up to a mutual coupling position which is variable according to the dimension of the busbars. The busbars are inserted in housings (29, 30) and pass through recesses (9A, 11A, 11B, 9B, 13) in the lateral walls of the casing. Fixing bolts extending between the busbars are surrounded by insulating sleeves (21) formed by interpenetrating outer and inner tongues (23 and 25) separated by slits (36). The sleeves (21) are made integral with the half-casings by molding of plastic material.

Abstract: Branch connection busbars to be firmly installed in upper and lower cases each have upper and lower series of branched tabs projecting upwardly and downwardly from the upper and lower lateral edges of the busbar, respectively, through tab connecting portions, with the upper and lower series of branched tabs staggered. The upper and lower cases are each provided at their opposing contact surfaces with seats. The branch connection bushbars are first installed into the lower case with the upwardly projecting branched tabs held firmly by the seats of the lower case. At the same time the downwardly projecting branched tabs are passed through tab insertion holes in the lower case. As the upper case is assembled onto the lower case, the upwardly projecting branched tabs are inserted into the tab insertion holes in the upper case and the seats of the upper case are held against the bottom of the downwardly projecting branched tabs.

Abstract: A vertical bus bar arrangement has three phases, each consisting of two U-shaped members disposed to form an H-configuration and a flat, rectangular bar spaced away from and on each side of the H-configuration. Insulator members are arranged between the bus bar arrangement and the brace members. The insulator members have extended portions raised away from the surface of the bus bars for receiving part of the two interconnected barrier members. The insulator members and a substantial portion of the barrier members form a labyrinth between phases. The barrier members have knockout portions for the electrical connections of the bus bars, and also portions for covering the raw edges of the bus bars in the areas through which the runbacks extend. The crossbars are connected to the bus bars by at least two connectors, one of which extends in the gap formed by the connectors of the bus bars, and one of which extends alongside the flat bar and parallel to the first connector.

Abstract: A busway of the type having a plurality of power bus elements inside a grounded housing and a ground conductor conductively fixed to the housing is provided with a ground bus element which is insulated from the housing for connection as an isolated ground for equipment which is to be protected from spurious power surges in the ground conductor of the housing.

Abstract: A non-metallic enclosure for electrical apparatus has a housing and cover with a door pivotably mounted on the cover. A hood is attached to the housing such that when the door is attached to the cover and the cover is attached to the housing at least one pivotable connector will be behind the hood so that the door can only be nondestructively removed by removing the cover from the housing. Electrically conductive connectors and resilient snap-in members are preferably molded into the housing to secure bus bars and neutral bars to the housing.

Abstract: A holder with busbars for a busbar system to connect electrical equipment, the holder consisting of a rectangular and plate-shaped insulating support with receptacles for busbars located in its top and a channel-shaped receptacle into which the insulating support is inserted. A number of busbar sections are fixed in position in the receptacles and run parallel to one another at uniform intervals.

Abstract: An electric power bus removable joint includes three spacer-connectors that automatically align the intervening splice plates and insulative plates used to electrically connect between adjoining busway sections. The spacer-connectors automatically attach between the opposing joint face plates without requiring any additional fastening means.

Abstract: A multi-component electric switch-circuit breaker module permits electric switches and circuit breakers to be field-installed within existing panelboard-switchboard enclosures. The module contains a pair of compartments that are accessed by separate doors. Electric switches or circuit breakers can be arranged within both compartments or an electric switch can be installed within one compartment with an electric circuit breaker installed within the other. The module is removably attached to the panelboard-switchboard interior by means of a bail handle arrangement. The module is removed from the assembly by unscrewing the bail handle and manually accessing the module. Spring-loaded connector clips allow for repeated connection with and disconnection from the systems power bus with minimum contact resistance.

Abstract: A bus bar and duct combination as is disclosed comprising a plurality of bus bars encased and held, at a central part between end joint parts of the bus bars, within a metal duct such that the bus bars, the duct and electrical insulation members are in intimate contact to provide heat transfer from the bus bars to the duct by way of conduction.

Abstract: A panelboard bus bar arrangement. The arrangement includes an insulating base pan which is supported upon a steel base pan. The arrangement also includes three bus bars positioned within the insulating base ban and arranged side-by-side in a parallel manner. The distance between the bus bars is maintained relatively small by using an insulating member which shields and insulates the bus bars from each other. The insulating member includes openings which expose only portions of the bus bars, and dividers which separate adjacent openings and increase the cross surface distance between the openings. By increasing the cross surface distance between openings, arcing is inhibited between the openings.

Abstract: An electric ducting comprises, inside a metal protection casing in the form of a tubular conduit, a flat support which extends in the longitudinal direction of the casing, over the whole length thereof, and which is formed by extruding an electrically insulating plastic material. The support is provided with parallel grooves arranged side by side, in each of which a current conducting bar is housed flat. For the same flat grooved extruded support, the conducting bars corresponding to different current ratings have the same general U-shape whose legs and base have respectively the same outer height and the same outer width whatever the current rating, only the thickness of the U-shaped bar varying as a function of the current rating.

Abstract: An electric power busway system includes a plurality of closely spaced bus bar conductors with each bus conductor having at least one offset contact blade extension welded or brazed thereto. The contact blades engage corresponding contact spring type receiver stabs within a power take-off assembly with interphase insulators arranged between the corresponding blade receive stabs.

Abstract: A backplane connector assembly including a motherboard connector and power and signal daughterboard connectors is disclosed. The motherboard connector has a signal section and a power section. Individual signal contacts are located in the signal section of the motherboard connector. A laminated power bus is located in the power section of the motherboard connector which is on the opposite side of the daughterboard from the signal section. Each of a plurality of separate busses in the laminated power bus has tabs extending from one edge and bent at right angles relative to the bus so that the tabs extend orthogonally relative to the daughterboard. This configuration permits daughterboards having different thicknesses to be mated inserted into the same motherboard connector. The laminated power bus permits power to be delivered externally of the motherboard to the daughterboards.

Abstract: Molded plastic outlet boxes are attached to an electric busway power distribution system at each location along the system where the bus bar conductors are provided with plug-in stabs. Slotted openings arranged through a top of the outlet box are centered with respect to the busway stabs to assist in connection therewith. A molded plastic access cover can be mounted optionally on either side of the box to electrically isolate the busway stabs.

Abstract: A prefabricated electric connection device includes a set of bars which extend parallel to each other. Intermediate connection members each provided with an external insulating sleeve are fixed to respective ones of the bars and extend forwards perpendicularly to the bars. The bars are drilled with aligned holes through which extend, with interposition of the insulating sleeves, the intermediate connection members fixed at their rear ends to the bars situated behind a first bar.

Abstract: A receptacle in the form of a clip for busbar holders that are made of plastic. The holder consists of a mounting plate that has margins which are inwardly recessed and project beyond their wider sides along its longitudinal edges. Each clip extends out of a web that fits under the recessed margins. The holders can be suspended and have parallel busbars. The ends of the webs, which constitute a component of the clips, are trimmed narrower. The webs are twice as long as the clips and have an extension that fits under the recessed margins of the mounting plate. The clips are cast onto one end of the webs with allowance left for the extension. The side of the webs that faces away from the clips has a positioning pin that extends into apertures provided for that purpose in the mounting plate.

Abstract: An electric power busway system includes a plurality of closely spaced bus bar conductors with each bus conductor having at least one integrally formed contact blade extending therefrom. The contact blades engage corresponding contact spring type receiver stabs within a power take-off assembly with interphase insulators arranged between the corresponding blade receiver stabs.

Abstract: An adapter module allows circuit breakers and disconnect switches of varying ratings to be installed within a common power panel enclosure. The adapter consists of a plastic base member through which multiple contact jaws extend for plugging onto the individual phase buses of a multi-phase power system. The opposite ends of the jaws include means for connecting with the line terminal of both the electric circuit breakers as well as the electric disconnect switches.

Abstract: A multiple electrical outlet strip is made in a simple inexpensive manner, yet the device produced has enhanced mechanical and electrical properties. A housing is extruded from plastic, and includes elongated electrically conductive material-receiving interior channels. A plurality of sets of spaced through-extending openings are formed in the housing top surface adjacent the electrically conductive material-receiving interior channels, the openings for receipt of male electrical plug prongs. Elongated spring brass contact strips are inserted the electrically conductive material-receiving interior into channels, and the strips are electrically interconnected to a cord which extends exteriorly of the housing. A bottom cover which comprises a plastic extrusion is slid into covering relationship with the housing bottom, and end plates are mounted with the housing to cover its open ends.

Abstract: A device for low voltage electric distribution includes a set of bus bars for feeding a plurality of outlets protected by a circuit breaker apparatuses, characterized in that it comprises a molded insulating structure comprising two vertical parallel walls (1, 2) separated by a horizontal transversal partition (3), with metal rails (10, 20, 30, 40) inserted in the transversal partition and opening onto either side of said partition. One side acts as a support for the bus bars (11, 21, 31, 41) and the other forming power connections (12, 22, 32, 42), with the tips of said power connection being arrange in accordance with the generatrices of a cylinder with a vertical axis situated in the symmetry plane of the structure. The structure, on the side of the supplies is divided by horizontal partitions defining sockets, with each socket capable of receiving an insulating component (66) bearing clamps (71, 72).

Abstract: An improved plug-in assembly facilitating the tap-off of electrical current from bus bars carried in a busway section that includes opposite side rails and a plurality of plug-in openings formed in each of the side rails in back-to-back association or registration with each other. The plug-in assembly includes a substantially symmetrical insulating base and a door, each swingably connected to the side rail. Ears formed in the side rail adjacent the plug-in opening are aligned with ears formed on the door and a drive screw extends through holes in each pair of ears and into an opening in a support post provided on the side of each base. The screw is fittingly retained in the ear of the side rail while the door and base members fit loosely over the drive screw to permit those parts to swing between an open and a closed position. A metal cover latch is self-retained in one of a pair of symmetrically positioned latch retaining grooves on the front of the base which retains an integral catch portion on the door.

Abstract: An improved housing for a busway system is provided by a two-piece ground bus which includes a generally U-shaped upper section having a top portion and a pair of parallel side flanges extending a predetermined distance and a generally U-shaped lower section having a bottom portion and a pair of parallel side flanges extending intermediate and parallel to the side flanges of the upper section. The main bus bars are retained intermediate the top portion and the bottom portion of the ground bus while also being positioned between the side flanges of the upper section of the ground bus. A side rail is provided on each side of the ground bus. A plurality of fasteners extend along the length of the busway section and connect each side rail with both the upper and lower sections of the ground bus.