Abstract: An embedded shelf power taking system has a power supply track and an electrical component disposed on the power supply track, the power supply track has two strip-shaped baffles, a bottom plate and two strip-shaped electrical conductive members; the embedded shelf power taking system of the invention can be embedded into the wall for hidden installation, integrates the functions of fixing the laminate and fetching electricity with electric appliances on the laminate, and can fetch electricity at the same time when installing the laminate, which is convenient for installation and stable and reliable for fetching electricity.

Abstract: A low profile lighting adapter can include a first housing section configured to hold an electrical ground connection, and a second housing section configured to couple with the first housing section, the second housing section including a planar surface orthogonal to the first housing section. The low profile lighting adapter can include a second electrical connection disposed in the first housing section and opposite of a first electrical connection, wherein the first housing section is configured to allow individual actuation of the second electrical connection along an axis orthogonal to a planar surface of the second housing section. The low profile lighting adapter can include an extending arm coupled to the second housing section and configured to rotate about the axis. Certain of the disclosed embodiments can permit a live connection to be individually set at different levels to engage different electrical circuits on a light track.

Abstract: A device for the electrification of furniture includes at least a first furniture panel, which has, in one of its two panel sides, two parallel grooves and two exposed busbars laid respectively in the two grooves and at least one electric plug for connecting to the two busbars. The plug has two electrical contacts, which are formed as exposed collector contacts on a connecting side of the plug housing and as connection contacts on a front side of the plug housing. The plug is inserted into a bore, interrupting the two grooves, in the one panel side of the first furniture panel. The collector contacts each lie against the two busbars in an electrically conductive manner.

Abstract: A lighting assembly connector is configured for being inserted into a lighting track. The lighting assembly connector includes a casing having a width defining a lateral direction and a length defining longitudinal direction. The length is greater than or equal to the width. The casing is definable as including three sections each defining one-third of the length. The three sections include a middle section, a first end section including a first longitudinal end of the casing and a second end section including a second longitudinal end of the casing. The middle section has a greater average width than each of the first end section and the second end section. The lighting assembly connector also includes a plurality of electrical contacts extending out of the casing each configured for contacting a respective line of the lighting track; and at least one fastener connected to the casing configured for removably connecting the lighting assembly connector to the lighting track.

Abstract: The present application relates to a socket. The socket may include a housing and a plug. At least one of a slot or a hole may be positioned on at least one side of the housing. A clamping conducting strip may be positioned in the housing. At least two elastic conducting contacts may be positioned on a surface of plug. The elastic conducting contacts may connect to a power source, and the plug may be positioned outside the housing. A connecting groove may be positioned on a back side of the housing. An inner contact point may be positioned in the connecting groove and be connected to the clamping conducting strip. A connector may be positioned in the plug. An external contact point may be positioned on the connector. The external contact point may be connected to the elastic conducting contact. The connector may be inserted into the connecting groove.

Abstract: A merchandise display system may include a low voltage power assembly may comprise a track that includes one or more conductive rods and one or more mechanical connections, wherein the track is powered from a power source; and a power connector assembly that connects to the track, wherein the one or more conductive rods connect to the power assembly providing a power connection, and further wherein the one or more mechanical connections connect to the power assembly providing a mechanical connection. The power connector assembly may be configured to provide low voltage power through the track to a low voltage power device. The power assembly may include a configuration of mechanical connections and conductive material arranged in such a way as to provide power and/or signal distribution to a mating device, such as to a set of LED modules, other lighting sources, or powered track devices for use with a merchandise display system.

Abstract: A lighting system has at least one channel for receiving at least one light unit that can be inserted into the channel, and at least one connector that can be inserted into the channel. The channel has, in an inner region thereof, a busbar for supplying the light unit, which can be electrically coupled to the busbar, with power. The connector is designed to electrically couple busbar portions of the busbar to one another. Furthermore, the connector is designed to be mechanically coupled to portions of the channel. The channel and the connector are further designed such that, when inserted in the channel, the light unit can be arranged so as to overlap the connector, inserted into the channel in order to couple the busbar portions, within the channel.

Abstract: An electrical buss has a carrier and at least a pair of electrically conductive elements. The at least a pair of electrically conductive elements extend linearly along a length of the carrier and at least a portion of each of the least a pair of electrically conductive elements is exposed at a surface of the carrier. A connector is releasably couplable to the electrical buss adjacent to the surface of the carrier. The connector has at least a pair of electrically conductive contacts for engaging with the electrically conductive elements at any desired location along the length of the carrier.

Abstract: A bar-typed track LED lamp includes a track, a bar-typed LED lamp movably mounted on the track, a connector disposed between the track and the bar-typed LED lamp, and two balance mechanisms disposed on the bar-typed LED lamp and arranged at both sides of the connector along a longitudinal direction of the track. Each of the two balance mechanisms includes a housing disposed on the bar-typed LED lamp, a prop received in the housing and protruding from the housing, and at least one elastic member arranged between the prop and the bar-typed LED lamp. The prop presses against the track while the elastic member is under compression. Whether the direction of the tension force F is strictly coincide with the center of gravity of the bar-typed LED lamp or not, the bar-typed LED lamp always receives an equal moment. Therefore, the connecter or the bar-typed LED cannot be damaged.

Abstract: An illuminated shelving system is provided having light bars attached to the shelves. The light bars are electrically connected to a power strip that conducts electricity from a wall outlet to a plurality of light bars.

Abstract: Various embodiments of an awning roller assembly is provided. The structure provides an awning roller tube having a first end and a second end with a powered groove extending between the ends, in full or in part. The powered groove includes a plurality of tracks having at least one electrical conductor in each track. An accessory base is provided for connection with a plurality of powered accessories, including but not limited to, lights, fans or audio-video equipment. The accessory base provides electrical connection between the powered groove and the accessory to provide improved function in the outdoor living space beneath and around the awning.

Abstract: Arrangement introduced on rail for movable sockets susceptible to receive several sockets by the fitting and turn on the rail's body. It comprises an electrical energy conductor rail with a body that internally has a rectangular gap that prolongs for the whole extension of the rail configuring an access and housing for movable sockets to be inserted on the rail. Once chosen the assembly local of the movable sockets along the rail longitudinal profile, each socket has its metallic contacts inserted in the rail's gap from the frontal aperture and turned to 90 degrees, making the convex saliences, with interference, to meet the metallic plates, closing electric contact and energizing said socket. The removal of a socket occurs by a new 90 degrees turn in relation to the rail, resulting on the separation of the metallic contacts of the plates and the consequent desenergization of the socket.

Abstract: Technology is provided for a powered slide rail. The powered slide rail includes an outer segment including a first elongate conductor, a middle segment slidably nested with the outer segment that includes a second elongate conductor, and a first conductive element connected to the second elongate conductor and positioned for sliding contact with the first elongate conductor. An inner segment is slidably nested with the middle segment and includes a second conductive element positioned for sliding contact with the second elongate conductor.

Abstract: A cable raceway support device for an aircraft, formed from an electrically conductive material, comprising a pedestal having a fastening plane for the fastening of the device onto a primary structure and also having, on a support face which is an opposite face to the fastening plane, at least one pair of jaws having at least one electrical contact enabling a sliding electrical contact to be formed and the support face has a contact that projects, and also has a jaw overhanging the support face, the jaw forming with part of the pedestal the pair of jaws forming a stirrup-shaped clamp comprising a base and two branches, one branch of the clamp merging with the pedestal, and the other branch of the clamp corresponding to the jaw and bearing a second contact facing the first contact.

Abstract: Described are track adapters for snap-fitting within a recess of a track, the track adapters including at least one manually-releasable spring tab comprising a lip and a release tab; and at least one slidably-releasable spring tab comprising a lip, wherein the at least one manually-releasable spring tab and the at least one slidably-releasable spring tab are adapted to deflect inwardly to permit snap-fit insertion of the track adapter into the recess. Also described are light fixtures including a fixture head comprising at least one lamp housing, wherein the at least one lamp housing supports at least one lamp; and a curved arm connecting the fixture head to a support surface.

Abstract: A rotatable power strip includes a base, a cover, a fixing member fixed to the base, and a socket. Two opposite first conductive pieces and a second conductive piece between the first conductive pieces are mounted to the base. The socket is rotatably mounted to the base. A top of the socket is exposed out of the cover. Two first conductive pins and a second conductive pin are mounted to a bottom of the socket. The second conductive pin is arranged between the first conductive pins and engages with the second conductive piece. The socket is rotated around the second conductive pin. The fixing member is capable of locking the socket to a conductive position where the first conductive pins respectively engage with the first conductive pieces, and a non-conductive position where the first conductive pins respectively disengage from the first conductive pieces.

Abstract: A combination grounding/mounting connector and method for mounting an electrical receptacle adapted to receive an electrical current carrying cable connector to a panel. The combination grounding/mounting connector device includes a first portion passing through an aperture formed in the receptacle and the panel for engaging a device for securing the electrical receptacle to the panel, the first portion accommodating connection to an electrical ground; and, a second portion providing an electrical ground connector when the first portion is connected to an electrical ground.

Abstract: In one embodiment, an electrical power distribution apparatus is disclosed which includes a track made up of a plurality of track sections connected together by/to joints and end sections. The track sections are each provided with a slot with which a power point connector may be engaged at any point by inserting a contact member of the connector through the slot at a chosen point and then rotating the connector by 90 degrees to bring the contact member into engagement with electrical conductors, of the track. The apparatus may comprise a further conduit containing conductors used to distribute communication signals. Also included are a switch operable in response to rotation of the connector and a sound producer to indicate when the switch has reached one of its end positions.

Abstract: In one embodiment, an electrical power distribution apparatus is disclosed which includes a track made up of a plurality of track sections connected together by/to joints and end sections. The track sections are each provided with a slot with which a power point connector may be engaged at any point by inserting a contact member of the connector through the slot at a chosen point and then rotating the connector by 90 degrees to bring the contact member into engagement with electrical conductors, of the track. The apparatus may comprise a further conduit containing conductors used to distribute communication signals. Also included are a switch operable in response to rotation of the connector and a sound producer to indicate when the switch has reached one of its end positions.

Abstract: An electrical busway system comprising a busway uniquely configured for cutting to length in the field. Special connector devices are also disclosed, with features for engaging and immobilizing busway insulators to assure accurate initial alignment of conductors and contact elements prior to joining of connector devices with busway sections. An accessory device, specially adapted to the new busway design, includes a rotatable contact element, slideably received in its rotatable support, which progressively displaces a spring as the contact element is rotated into contact with a busbar carried by a busway insulator. Good electrical contact at both ends of the slideable contact element is assured.

Abstract: A single pole power connector system includes a plurality of single pole connectors for carrying electric current in a multi-phase power applications. A single pole connector can be provided for each phase or line of the application. The single pole connectors can include mating male plugs and female receptacles. To releasably couple the male plugs and female receptacles of each single pole connector together, the plugs and receptacles can include between them a coupling feature. To prevent or avoid misconnections between male plugs and female receptacles of different single pole connectors, the plugs and receptacles can also include between themselves a polarization feature. The polarization feature can be angularly offset with respect to the coupling feature so that the plugs and receptacles can only couple with their intended pair.

Abstract: In one embodiment, an electrical power distribution apparatus is disclosed which includes a track made up of a plurality of track sections connected together by/to joints and end sections. The track sections are each provided with a slot with which a power point connector may be engaged at any point by inserting a contact member of the connector through the slot at a chosen point and then rotating the connector by 90 degrees to bring the contact member into engagement with electrical conductors of the track. The apparatus may comprise a further conduit containing conductors used to distribute communication signals.

Abstract: An electrical connector includes an insulative housing (1) defining a receiving cavity (121) therein, at least one terminal (2) arranged in the housing, a sleeve (4) retained in an inside of the receiving cavity and a grounding contact (5) defining a clip portion (52) to lock the sleeve in the housing.

Abstract: In one embodiment, an improved electrical power distribution apparatus is disclosed which includes a conduit containing at least one elongate conductor (4126, 4128). The conduit has an opening (4154) through which a connector is able to be inserted to connect electrically with the conductor (4126, 4128). The improvement relates to the use of a plurality of conductive members (5100) disposed between the opening (4154) and the conductor (4126, 4128), and a plurality of resilient support members (5200) such that each conductive member (5100) is separately supported by a respective support member (5200) and displaceable by a connector to provide access to the conductor. An improved power supply connector for use with the power distribution apparatus is also disclosed.

Abstract: The modular track luminaire system of the present invention is a modular lighting system which has a lighting unit which is electronically connected to a remote ballast housing by a removable and reattachable insulated cord and plug system, the luminaire unit electrically connected to the ballast housing through the flexible cord and plug system thereby allowing the entire system to be modularized.

Abstract: In one embodiment, an improved electrical power distribution apparatus is disclosed which includes a conduit containing at least one elongate conductor (4126, 4128). The conduit has an opening (4154) through which a connector is able to be inserted to connect electrically with the conductor (4126, 4128). The improvement relates to the use of a plurality of conductive members (5100) disposed between the opening (4154) and the conductor (4126, 4128), and a plurality of resilient support members (5200) such that each conductive member (5100) is separately supported by a respective support member (5200) and displaceable by a connector to provide access to the conductor. An improved power supply connector for use with the power distribution apparatus is also disclosed.

Abstract: In one embodiment, an electrical power distribution apparatus is disclosed which includes a track made up of a plurality of track sections connected together by/to joints and end sections. The track sections are each provided with a slot with which a power point connector may be engaged at any point by inserting a contact member of the connector through the slot at a chosen point and then rotating the connector by 90 degrees to bring the contact member into engagement with electrical conductors of the track. The apparatus may comprise a further conduit containing conductors used to distribute communication signals.

Abstract: A coupling system that allows maximum flexibility for vehicle users to relocate, remove or replace electrical and/or mechanical devices throughout the interior of a vehicle, with several slot openings formed in the vehicle structure and coupling components which provide the connections of the devices to the vehicle, via the slots.

Abstract: Power interconnect assemblies include a longitudinally extending base member including a plurality of longitudinally extending bus bar receiving channels configured to receive longitudinally extending bus bars. An interconnect module is configured to be coupled to the base member. The interconnect module is configured to receive a connector member that is configured to receive a pluggable connectorized cable from a power component. The base member is configured so that ones of a plurality of electrical connectors of the connector member may be coupled to corresponding ones of the bus bars with the bus bars inserted in the channels.

Abstract: An electrification system for use with an article slidably supported on a track within a vehicle is provided. The electrification system comprises a conductor assembly including a positive conductive interface supported parallel and adjacent to a negative conductive interface. The conductor assembly is configured to extend substantially the length of the track. The electrification system further comprises a contact assembly including a positive contact in electrical communication with the positive conductive interface and a negative contact in electrical communication with the negative conductive interface. The contact assembly is configured to be fixed relative to the article. The contact assembly remains in electrical communication with the conductor assembly as the article is selectively moved along the track to provide continuous electrical power to the article as the article is moved.

Abstract: An electrical socket includes a sliding rail unit and a receptacle unit disposed slidably on the sliding rail unit. The receptacle unit includes a base and a receptacle seat mounted rotatably on the base. The receptacle seat is rotatable on the base between a conducting position, where the receptacle unit is retained on the sliding rail unit, and a non-conducting position, where the receptacle unit is removable from the sliding rail unit.

Abstract: An adaptor box for mounting a fixture to a low voltage track having a housing containing contacts with one of their ends formed with female contact portions which are arranged on above the other in the housing to provide a common mating axis in the housing connection to a male coax connector of the fixture and other ends forming feet protruding from a mounting head of the housing for connection to respective busses of the low voltage track. Contact separating and locating protuberances are molded on the interior of the housing and an insert molded with additional contact locating and separating protuberances is assembled through a front opening in the housing.

Abstract: An electrical distribution system includes a track having a longitudinal extension and a facia. The facia has an elongate slot extending generally parallel with the longitudinal extension. The slot includes a plurality of elongate side channels extending transversely from and generally parallel to the longitudinal extension. The track includes a plurality of electrical conductors, with each electrical conductor being positioned within a corresponding side channel. The plurality of electrical conductors include at least one data conductor. A modular electrical component includes a male connector extending therefrom which is disposed within the slot. The male connector includes a plurality of electrical terminals extending therefrom, with each electrical terminal disposed within a corresponding channel and electrically coupled with a corresponding conductor.

Abstract: A method for electrically connecting a circuit board connector to an external device. An embodiment of the method comprises providing a probe block through one end of a guide sleeve open on opposing ends, linking at least one contact on the probe block is linked to the external device, positioning the probe block so that the at least one contact is substantially aligned with a corresponding pin on the circuit board connector, and moving the probe block through the guide sleeve until the at least one contact makes a connection through one of the opposing open ends of the guide sleeve with the corresponding pin on the circuit board connector.

Abstract: A lighting rail for at least one lighting device, the lighting device being provided with a contact part for electrical contact with a conducting strip of the lighting rail, and with clamping and tension means to press the contact part against the conducting strip, wherein the lighting rail comprises a substantially U-shaped support element, a live conducting rail fitting into the support element and insulating means for insulating the conducting strip from the live conducting rail fitting therein, wherein the support element and the live conducting rail comprise cooperating attaching means to releasably attach the live conducting rail in the support element by snapping.

Abstract: A track adapter (10) is disclosed for electrically connecting a light fixture to either of two electrical circuits (42, 43) of a track (22). The track adapter (10) includes a housing (14) and a housing base (12) having a slot (72) formed therein. An electrical contact (20, 220) has an elongated leg (120, 240) which is received through the slot (72) such that a first end (154) of the contact (20, 220) terminates within the housing (14). The electrical contact (20, 220) is movable within the slot (72) between a lower position in which the electrical contact (20, 220) contacts the voltage bus (42) of a first electrical circuit within the track (22) when the adapter (10) is mounted to the track, and an upper position in which the electrical contact (20, 220) contacts the voltage bus (43) of a second electrical circuit within the track.

Abstract: A faceplate assembly, for use with an electronic circuit card, comprising a faceplate and a movable plate, each including conductive portions or being made of a conductive material, and in electrical contact with each other. The faceplate is adapted to mount to an electronic circuit card, and has first and second opposite edges. The movable plate has a free edge and is movably coupled to the faceplate to move, by pivoting, sliding or the like, with respect to the faceplate between a retracted position and an extended position. Movement of the movable plate can be effected manually, or automatically by movement of the latches on the electronic circuit card assembly which latch the electronic circuit card assembly into an electronic circuit card housing.

Abstract: A track-lighting system of the present invention includes an electrically conductive track, a power supply being adapted to be mounted to the track at a desired position along the track to energize the track, and at least one lighting fixture adapted to be mounted to the track at a desired position along the track. The lighting fixture is independent of the power supply and is electrically connected to the power supply by the electrically conductive track to be powered by the power supply. The track, lighting fixtures and power supply are sized to be mounted beneath an elevated cabinet, such as a kitchen cabinet. The track, the power supply, and lighting fixture are therefore sized and shaped to be substantially flush with a bottom of the lip of the cabinet when the track lighting system is mounted to the cabinet. In one embodiment, the power supply is provided with a wire splice compartment which enables two or more power supplies to be electrically connected in parallel.

Abstract: According to the present invention there are provided a highly reliable electrode of high strength which undergoes little change even with the lapse of time, and a method for making the same, as well as a vacuum valve using such electrode and a vacuum circuit breaker using such vacuum valve. The vacuum circuit breaker has a fixed electrode and a movable electrode, each comprising an arc electrode, an arc electrode support member for supporting the arc electrode, and a coil electrode contiguous to the arc electrode support member, the arc electrode, the arc electrode support member and the coil electrode being formed as an integral structure by melting, not by bonding, particularly the arc electrode support member and the coil electrode being constituted by a Cu alloy containing 0.05-2.5% by weight of at least one of Cr, Ag, W, V and Zr.

Abstract: A track lighting fixture in which decorative lamp housings are adjustably positionable along a fixture track, and which provides for several angular adjustments of each decorative lamp housing. Each decorative lamp housing comprises a common outer housing in which different interchangeable decorative inserts can be interchangeably inserted. In first and second embodiments, each track lamp fixture has a power supply housing for an enclosed power transformer and power supply which is attached to the fixture track. A support element of the power supply housing is rotationally mounted relative to the power supply housing and supports a decorative lamp housing thereon, such that the support element and decorative lamp housing can be rotated to different angular positions. In the first embodiment, the power supply housing comprises a cylindrical shaped housing, and in the second embodiment, the power supply housing comprises a rectangular shaped housing.

Abstract: A lead frame is formed by subjecting a frame base to a forming process, a semiconductor chip is fixed on leads formed in the lead frame and wires are provided in the semiconductor chip, and then a package which accommodates the semiconductor chip is formed; a non-conductive adhesive being provided, before the forming process, on a position on the frame base in which the leads are formed, and unnecessary portions of the frame base and the non-conductive adhesive being removed in the forming process so that the leads having a predetermined configuration and provided with the non-conductive adhesive are formed.

Abstract: An extruded track or base has exposed conductor segments molded into the polymeric base. A socket defining adaptor is releasably secured to the base in any location there along by twisting it through only 45 degrees or less. The adaptor is assembled from a back plate that has cams designed to fit into slots provided in the base, and a cover portion that defines a socket for a thru prong plug. In a cavity defined by the cover and back plate fixed and flexible contacts provide electrical connection between the plug socket and the conductor segments in the track or base. Each plug prong is connected with an opposite conductor and the ground plug stud connects to a ground conductor in the base through a spring located at the axis of rotation for the adaptor during the twist locking of the adaptor onto the track.

Abstract: The object of the invention is to provide an improved orbital lamp with easy, inexpensive and safe installation comprising one top lid having one semi-circled opening on its back in corresponding to the opening on the lid top on the bottom lid. Said top lid has one L-shaped opening on its top extending to its side for the moving rod to move therein. Said top lid has one arc-shaped protrusion block on its front end. Said movable pivot has two protrusion rings with proper distance in the between to be set into the opening on the supporting plate on the bottom lid. Said movable pivot has one inlaid fastening plate stretching out of the lid top on the bottom lid to inlay into the moving trough on the orbital strip through the movement of the moving rod. The flat long strip protruded poles on the bottom lid may fit into the the through holes on the top lid making the connection of the top lid and the bottom lid tight and firm.

Abstract: The invention provides an electrical distribution system for skirting boards having an extruded housing which houses a conductor assembly so as to form a longitudinally extending access channel in which, at any location, a connector plug can be inserted. The conductor assembly has a number of slots in opposite faces and in which in one face bus conductors are located. The width of the slots decrease when the conductor assembly is bent so that the distribution system does not have to be cut at wall corners. The connector plug is rotated through 90 degrees to establish electrical contact.

Abstract: A modular electrical-energy distribution system has at least one conductor and a contacting device which makes it possible to establish, at essentially any point in the conductor system, a contact with the conductor. The tap or contacting devices essentially clamp onto or between conductor bars and therefore essentially permit all contacts to be made simply from one side of the conductor bars thereby reducing installation time.

Abstract: An adapter box for attaching a low voltage lighting fixture to a low voltage track. The track has an insulator track body with a pair of parallel conductive wires mounted in the body. The body has a longitudinal web with a flange formed integral with each of opposed sides. A pair of opposed inwardly extending edges is formed integral with the flanges to provide an open space between the edges. The adapter box includes a pair of insulator housing halves secured to each other. Each housing half having a portion of each of a pair of mounting ears connectable to the track body at the opposed edges. The housing halves define a contact opening adjacent to the mounting ears. A pair of contacts is mounted in the housing halves for engaging in electrically conductive contact with the respective conductive wires in the body. A fixture wire is connected to each of the contacts. A contact separator is formed integral with one of said housing halves adjacent to the contact opening for holding the contacts apart.

Abstract: A detachable, low wattage track mounting lamp of the type comprising a track for mounting at least a project lamp via a transformer, wherein said transformer has two hooked conductors fastened in said track and electrically connected to a power supply, and said project lamp has hooked conductors electrically fastened in said transformer. Either said project lamp or said transformer can be detached for replacement when damaged.

Abstract: A connector apparatus or adaptor for use in a track-lighting system is provided which includes a grounding leaf to effect electrical contact between a grounded metallic track and a grounding conductor or grounding wire in the connector apparatus. The grounding leaf is slidably mounted onto the floor of the connector apparatus and provides an upwardly protruding lip which is placed in contact with an arm of the metallic track upon locking engagement therewith.

Abstract: A modular illuminated display has individual symbol elements each with small electric ampules spaced apart therein and selectively mounted on a U-section rail so that terminals of the symbol elements can mechanically support them on the rail and effect electrical connection between conductors and the inner walls of the rail with the lamp ampules of the mounted symbol elements.

Abstract: Track lighting apparatus is disclosed which includes a track section, plug box and plug connector designed to incorporate two lighting circuits independently controllable within the same track section. The track section includes a neutral bus and a grounding bus on one lateral side and two independent voltage busses on its other lateral side. The head of the plug box inserted in a bottom slot running the longitudinal length of the track section, may be rotated into position in only one direction, thereby preventing inadvertent connection of neutral and grounding contacts to voltage busses and vice versa. The plug box head has a voltage contact which may be mechanically moved between two positions for alternative connection to either of the voltage busses of the track when the plug head is connected to the track.