Abstract: A terminal block assembly includes an electrical terminal having a first stationary contact provided with insulation-piercing knife edges, and a second contact arrangement for connecting the terminal to a corresponding terminal on an adjacent terminal block assembly, the second contact arrangement including a male connector and a female jack connector that are arranged in opposite directions transversely of the terminal block body, thereby to afford connection with the corresponding terminal of an adjacent terminal block assembly mounted on a common support rail with the terminal block assembly.

Abstract: An electrical connector includes first and second mating sections (17, 18). The first section (17) forms a plurality of channels (25-28) for receiving wires (12-15). The second section (18) has receptacles (24A-24D) for receiving contact elements (20-23) having IDC contacts for connecting respectively to the wires. The contact elements are constructed so that they may be placed in any one of four quadrature positions while providing a dual IDC connection with its associated wire.

Abstract: A connector assembly has at least one base housing accommodating a number of pin-type contacts and one pressure plate housing, which may be mounted on a connecting end of the base housing and which may be latched together therewith at least in the mounted position. Each contact is inserted releasably into a longitudinal chamber in the base housing and comprises an insulation displacement end, a contact end opposite thereto and a central zone arranged between said ends.

Abstract: An apparatus is disclosed for connecting at least two conductors. One embodiment has a body and a cap engaging the body. The body has an open top to an interior region. The body has at lest two apertures extending through a body side wall and into an interior region of the body. The cap has a cavity downwardly extending from a top surface of the cap toward a bottom surface of the cap. The cavity terminates at a floor between the top surface and the bottom surface of the cap, and the floor has a puncturable thickness to provide access to the interior region of the body.

Abstract: Insulation displacement type contacts (3) each having a receptacle portion (9) are individually held in compartments (4) that are formed in an insulated housing (2). A stationary die (21) temporarily holds an electric connector (1) having such contacts (3). A punch (22) facing and cooperating with this die (21) will reciprocate vertically to press wire ends (15) into the receptacle portions (9) so as to establish electric connection between each wire end (15) and each portion (9). In order to protect these portions (9) from being forcibly widened when an insulation displacement operation is done, a pair of upright guards (31,32) formed integral with a supporting plate (33) are disposed in the die (21). These guards (31,32) are spaced from one another a distance equal to the sideways width of the insulated housing (2), so that its end walls (6,6) are propped up by these guards from the outside.

Abstract: A modular terminal block assembly including modular shells having channel shaped and walled ends, multiple housings for insulation displacements connectors and slotted partitions. A universal connector with extending parallel arms connect abutting modular shells, and barrier strips are located within the modular shells abutting the housings. End shells are also attached to the modular shells. Grease is placed in the housing and in activators mounted to the housings. The shells are filled with potting compound where the arms and partitions integral with the shells act as reinforcing elements in the compound. Thereafter the compound hardens so as to strengthen and stiffen the connected shells. This results in a robust assembly.

Abstract: An insulation displacement joint connector has a connector housing provided with a contact terminal into which a plurality of wires are press-fitted. The terminal is provided with wire fitting parts protruding from the connector housing. With the joint connector stacked on another joint connector with the same structure, the fitting parts of one joint connector are connected to wires in another joint connector by press fitting. Thus the use of a fewer number of joint connectors allows desired wire harness assembly, saving space and decreasing cost.

Abstract: A field-attachable contact assembly includes a contact having a seat portion which includes a wire-receiving aperture having a generally circular portion for receiving an insulated wire and a narrowing V-shaped portion for establishing an insulation displacement connection with the wire. A pusher includes a slot for receiving the seat of the contact, and an aperture which, when aligned with the circular portion of the contact opening, receives the wire. The pusher is then pushed onto the contact to establish an IDC electrical connection between the contact and the wire.

Abstract: An auxiliary machine module includes auxiliary machine a base plate equipped with the auxiliary machine; a case in which the base plate is mounted, and a connector tool for electrically connecting the base plate and the case. In this configuration, the number of components provided on the periphery of the auxiliary machine module, and the module can be reduced in size and weight in a simple structure. An inconvenience occurring in a conventional assembling operation can be also overcome.

Abstract: A cap for covering an electrical connector has a hollow tube with an exterior that is reversely tapered relative to the interior of the hollow tube, which adapts the tube for manufacture by a tapered mold core pin and a tapered molding die cavity, and which adapts the tube to funnel an electrical cable along the hollow tube.

Abstract: A connector has a housing, contacts, and a cover housing which is mounted in the housing. Electrical wires are passed through the cover housing, and the tip end portions of the electrical wires are held by clips. When the cover housing holding the electrical wires is pushed into the recess of the housing, the protruding tongue parts of the contacts pierce the outer coverings of the electrical wires, and bite into the conductors of the electrical wires. Since the supporting arms of the clips are positioned so that these supporting arms correspond to the protruding tongue parts, the insulating outer coverings of the electrical wires that are electrically connected by the protruding tongue parts are elastically pressed toward the protruding tongue parts from the outside by the supporting arms of the clips.

Abstract: A connector of the insulation-perforating type for a suspended electrical system comprises conductive means for cutting an insulating covering of an insulated supply cable in order to connect an electrical device electrically to an uncovered portion of the supply cable, and an insulating structure for enclosing the conductive means, in which the insulating structure includes a first insulating element which can be closed around the supply cable in a non-reversible manner in order to protect the uncovered portion from manual contact, and a second insulating element which can be connected to the electrical device and which can be joined reversibly to the first insulating element, the first insulating element comprising means for preventing sliding along the supply cable.

Abstract: An electric cord connector includes a base member that has a groove diametrically defined to receive an electric cord. Two contacts are respectively inserted into a bottom of the groove and electrically connected to a domestic appliance. Each contact has a sharpened end extending into the groove and aligns with a corresponding one of the two copper wires. A clamping block includes a presser to be received in the groove. The presser presses and holds the cord and the sharpened ends of the two contacts respectively cut through the insulating coating and electrically connecting to a corresponding one of the two copper wires of the cord so that the user does not need to cut off the insulating coating before connecting the cord to a domestic appliance.

Abstract: A testing and cut-off device, intended to be interposed on a bifilar telephone or computer-related line in order to connect two incoming strands to two outgoing strands, comprises a testing well inside which are located, on the one hand, a couple of free terminals (32, 33) corresponding to the two incoming strands and, on the other hand, a couple of free terminals (41, 42) corresponding to the two outgoing strands, and a cover (59) for closing the well. These two couples of terminals (32, 33, 41, 42) are electrically insulated with respect to one another, when the cover (59) is open, and each terminal (32, 33, 41, 42) then becoming selectively accessible from the outside by a respective testing plug. The testing and cut-off device further comprises means incorporating electrical contacts contained in the cover for effecting the interconnection of these couples of terminals in two's when the cover (59) is closed on the well.

Abstract: A screwless terminal, especially a modular terminal (1), with a conductor bar (3) situated in a terminal housing (2) and with an insulation displacement contact element (4) electroconductively connected to the conductor bar (3). An electrical conductor (11) that is introduced via a housing lead-through can be contacted between the cutting edges (7, 8) of the insulation displacement contact element (4) whereby the cutting edges (7,8) face each other. The insulation displacement contact element (4) is moveably arranged on the conductor bar (3). Insulation displacement contacting of the fixedly position conductor (11) is carried out by a translation movement of the insulation displacement contact element (4) along the conductor bar (3).

Abstract: An electrical connector system, comprising: an electrical connector; a plurality of wires extending from the connector and arranged in a plurality of twisted pairs; and an insert separating the wires defining each of the twisted pairs. A method of reducing cross-talk in an electrical connector system that produces an unwanted cross-talk, comprising the steps of: providing an electrical connector with a plurality of wires extending therefrom and arranged in a plurality of twisted pairs; providing an insert; placing the insert between the wires defining each of the twisted pairs. The insert causes the wires to produce a compensating cross-talk that offsets the unwanted cross-talk.

Abstract: A terminal is for displacing an insulator of an insulated wire. A housing includes an end which defines a groove for accommodation of the terminal. The end defines an insertion part for insertion of a jig for pressing the insulated wire to the terminal.

Abstract: A field-attachable contact assembly includes a contact having a seat portion which includes a wire-receiving aperture having a generally circular portion for receiving an insulated wire and a narrowing V-shaped portion for establishing an insulation displacement connection with the wire. A pusher includes a slot for receiving the seat of the contact, and an aperture which, when aligned with the circular portion of the contact opening, receives the wire. The pusher is then pushed onto the contact to establish an IDC electrical connection between the contact and the wire.

Abstract: A terminal block assembly includes at each end a generally U-shaped support spring having leg portions that extend upwardly in straddling relation on opposite sides of the stationary resilient contacts at opposite ends of the bus bar, thereby to support the stationary contacts as insulated conductors are displaced by actuator members toward cutting engagement with knife edges on the adjacent ends of the reversely inwardly directed stationary resilient contacts.

Abstract: An IDC connector assembly (10) mounted to a PCB (20) includes an IDC connector (30) and a wire (40). The IDC connector includes a housing (32) defining a hollow portion (322) having an entrance (323) and an exit (324), and a terminal (34) received in the hollow portion. The terminal includes a base portion (341), a solder portion (342) extending downwardly from the base portion and further extending outside the exit of the hollow portion for being soldered to the PCB, a pair of arm portions (343) extending from the base portion into the hollow portion, and a pair of head portions (344) respectively formed on the arm portions. The wire extends into the hollow portion of the housing from the entrance to be located between the pair of arm portions, and the pair of head portions pierces into the wire so that electrical connection is established between the wire and the terminal.

Abstract: A wire connector has a housing with a conductive clip therein. First and second retaining fingers are formed in the clip. Each finger engages a wire inserted into the housing to hold the wire in the housing. The fingers can be arranged for either a push-in or insulation displacement type connection. A conductive extension is electrically connected to the clip and extends out of the housing for connection to the terminus of an external electrical apparatus.

Abstract: An insulation displacement connector includes a first member and a second member movable relative to the first member between a first position wherein the second member is electrically connected to the first member and a second position wherein the second member is electrically connected to the first member and to the insulated electrical conductor. The insulation displacement connector is disposed within an internal cavity defined by a non-conductive housing. A stuffer is disposed within the cavity and the insulated electrical conductor is disposed within a wire insertion channel formed in the housing and extending into the cavity. The stuffer is moved in a direction substantially parallel to the insulated electrical conductor so that the second member moves from the first position to the second position in a direction substantially perpendicular to the insulated electrical conductor to establish the electrical connection.

Abstract: For the separable connection of an electrical conductor with a large cross-section to an insulation displacement connection, it is proposed that a connecting body with at least one insulation displacement terminal into which an electrical conductor can be forced by means of a clamping screw, be provided in a conductor-connecting element.

Abstract: A switch accommodating recess (13) capable of accommodating a switch assembly (30) and a wire accommodating recess (15) capable of positioning an FFC (20) which is electrically connected to a room lamp are provided in a vehicle compartment-side surface of an insulating housing 11 in the room lamp which is fitted in a lamp fitting window having an opening in a roof trim covering a vehicle body panel. At the same time as bus bars (21) are mounted on the vehicle compartment-side surface of the insulating housing (11), press-connecting terminals (21b) are subjected topress fitting connection to the FFC (20) positioned in the wire accommodating recess (15).

Abstract: A cap for covering an electrical connector has a hollow tube with an exterior that is reversely tapered relative to the interior of the hollow tube, which adapts the tube for manufacture by a tapered mold core pin and a tapered molding die cavity, and which adapts the tube to funnel an electrical cable along the hollow tube.

Abstract: A method of positioning wires in the slot (18) of a bifurcated insulation displacement contact (10). The wires are positioned in the slot alternatively disposed with respect to the side-to-side direction (“A”) of the slot. As between the or each successive pair of wires in the slot, the angle made between the wires of the pair is greater than that made by one of the wires with respect to the side-to-side direction of the slot.

Abstract: A connector has a housing, contacts, and a cover housing which is mounted in the housing. Electrical wires are passed through the cover housing, and the tip end portions of the electrical wires are held by clips. When the cover housing holding the electrical wires is pushed into the recess of the housing, the protruding tongue parts of the contacts pierce the outer coverings of the electrical wires, and bite into the conductors of the electrical wires. Since the supporting arms of the clips are positioned so that these supporting arms correspond to the protruding tongue parts, the insulating outer coverings of the electrical wires that are electrically connected by the protruding tongue parts are elastically pressed toward the protruding tongue parts from the outside by the supporting arms of the clips.

Abstract: A connector for three cables, each having two electric wires composed of a conductive core surrounded by an insulating sleeve. The connector includes an insulating block provided with as many separate holes as there are wires, the holes each receiving a nonstripped end of an electric wire that is inserted in the recess. The connector has two electrically conductive couplings, having as many terminal parts as electric wires to be connected, each of the terminal parts being shaped to break the insulating sleeve and then enter in conductive electric contact with the conductive core.

Abstract: A display instrument has a housing (1) with a base plate (3), on which a cable receptacle (5) is molded. In the region of the cable receptacle (5), contact pins (8) molded into the base plate (3) protrude with contact tips out of it. A clamping clip (17) is able to be swivelled over a flat cable (6) inserted into the cable receptacle (5), in such a way that the contact tips (21) penetrate into individual wires (7) of the flat cable (6) and thereby establish the contacting of the display instrument.

Abstract: In the branching connection box 10, wherein the press-contact terminals 14, 15 on the connection box main body 11 are connected to the electric wires 16, 17, 18 by press-contact, the vertically-connective press-contact terminals 14 that have press-contact parts 14c, 14d on both vertical sides and the horizontally-connective press-contact terminals 15 that have press-contact parts 15c, 15d on both vertical sides as well as press-contact parts 15c, 15d for horizontal linkage connection with such press-contact parts 15c, 15d as the plural press-contact terminals are used in arbitrary combinations, and the press-contact part 14c, 15c on one side of the press-contact terminals 14, 15 of the two linkage connection types are connected respectively to the ends 16a of the wires 16 on the trunk line B side by press-contact and the press-contact part 14d, 15d on the other side of the press-contact terminals 14, 15 of the two linkage connection types are connected to the other ends 17b, 18b of the predetermined wires 17,

Abstract: A receptacle for an elongated electrical raceway is oriented so that its ground receptacle lies either above or below the raceway's longitudinal centerline, presenting a convenient orientation for the plug, that is not commonly provided for in a raceway environment. The receptacle employs insulation displacement connectors offset so as to connect electrical wires running longitudinally through a raceway channel to the line and neutral and ground sockets at the receptacle's face.

Abstract: This slit-type insulation-displacement connector for electrical wire comprises a conducting connection piece (2) with a straight stripping and retaining slit (8) for the core of a wire. The slit is made longitudinally along a profiled part of the conducting piece. This connector furthermore comprises a metal reinforcement (4) made in a resilient material, which follows the shape of conducting piece (2) by surrounding it.

Abstract: A wiring unit for an electrical connector having a housing with a first side and an opposing second side, an attaching portion on the second side and a latching portion adjacent the attaching portion. The latching portion couples the wiring unit to a standard support. Electrical wiring terminals are coupled to the housing and can receive electrical wires. A stuffer cap is selectively coupled to the terminals and the attaching portion. When the stuffer cap is coupled to the attachment portion, attachment of the electrical wires to the terminals using an impact tool can be accomplished without damaging the latching portion since the stuffer cap spaces the latching portion from the support surface when the wires are forced into the terminals. When the stuffer cap is coupled to the terminals, the stuffer cap eliminates or substantially reduces oxidation or corrosion on the terminals and wires.

Abstract: An insulation displacement electrical connector assembly is disclosed for electrically terminating the conductors of a multi-conductor insulated flat cable. A connector base has a plurality of terminal-receiving passages. A connector cover is positionable on the base to provide a cable-receiving passage therebetween. The cable-receiving passage traverses the terminal-receiving passages. Complementary interengaging latches are provided between the base and the cover to hold the base and cover together clamping the cable in the cable-receiving passage. A plurality of insulation displacement terminals are movably mounted in the terminal-receiving passages for movement between inactive positions out of engagement with the conductors of the cable and insulation-displacement positions piercing the insulation of the cable and electrically terminating the conductors.

Abstract: An insulation displacement connector type adapter has a housing, a circuit board, two IDCs received in the housing and a cover to enclose the IDCs inside the housing. The two IDCs are vertical with respect to the circuit when the two IDCs are securely engaged with the circuit board, such that the center of gravity of the adapter falls within an area covered by the housing.

Abstract: A wiring apparatus of an electrical connector includes a pressing cover to be mounted on a plurality of piercing terminals of the electrical connector. The pressing cover is formed with a plurality of concave portions for guiding and separating the communication wires into specific positions when the pressing cover being fastened to the piercing terminals for fixing the wires. That is, the second pair and the fourth pair are allocated at both sides. The first pair and the third pair are in the middle. A guiding means is further used to tightly collect and fix the wires of first pair together, and to separate the wires of third pair to both sides of the first pair. Therefore, the pairs of wires are well allocated into specific positions to achieve a stable data transmission.

Abstract: Insulation displacing connectors extend upwardly from a base of the terminal block into connector chambers of driver modules movable relative to the base between upper and lower positions. Passageways within the modules direct service wires moved through the passageways into the connector chambers and into entrance openings underlying upper edge portions of the insulation displacing connectors within the chambers. Movement of the module from its upper position to its lower position drives the service wires downwardly from the entrance openings of the connectors into and through slots underlying the entrance openings, to establish electrical contact with the service wires and the connectors and, in the case of larger diameter wires, to impale the service wires upon impaling elements resisting pullout of the wires.

Abstract: A distribution terminal block for connecting individual drop wires to incoming telephone cable wires has a base that receives attachable modules. Each module has a pair of IDC clips. A plunger adapted for reciprocal movement within the module along a plunger axis presses the drop wires into engagement with the IDC clips. The module has a cavity filled with an electrically insulating gel. The plunger has an upper portion and a lower portion separated by a recess for receiving the drop wires. A spine connects the upper portion and the lower portion of the plunger. The lower portion has a smaller cross-sectional area than the upper portion and has an angled, sharp end for reducing disturbance to the insulating gel during movement of the plunger to insert, remove and reinsert the drop wires.

Abstract: An electrical connector having an improved connector shield and a multi-purpose strain relief includes an electrically insulative contact support member having a rearward cable termination end and a plurality of electrical contacts positioned on the support member forward of the termination end. An electrically conductive contact shield housing having an outer and inner walls surrounds the contact support member and extends rearward beyond the electrical contacts to shield both the contacts and the discrete conductors of a multi-conductor cable. The connector includes an electrically conductive strain relief device comprised of mirrored strain relief members which are in electrical communication with the shield housing and the cable ground thereby providing a ground path between the cable ground and the contact shield housing.

Abstract: A seal for sealing a connector having a test aperture includes a body and a latch formed with the body, the latch including a first deflection beam formed on one side of the body and a second deflection beam formed on an opposite side of the body. The latch also can include a first hook formed with the first deflection beam and a second hook formed with the second deflection beam. The first hook and the second hook are each pivotable between a first latched position and a second unlatched position when the first deflection beam and the second deflection beam are compressed.

Abstract: A communication plug that generates crosstalk, at a predetermined level, that complements the compensating crosstalk in a legacy jack or connector. The communication plug includes an electrical connector assembly comprising a plurality of conductive blades. Each conductive blade is adapted to make electrical contact with an insulated conducting wire and with a jack spring contact. At least two of the conductive blades are configured so as to cross over each other without making electrical contact. Complementary crosstalk is generated between the conductive blades in the region where the blades engage the jack spring wires or terminals thus minimizing the propagation delay between the crosstalk signals generated in the plug and the crosstalk signals generated in the jack or connector.

Abstract: A connector is provided to avoid problems in producing and handling a wiring harness when one conductive path which is branched from a main path of the wiring harness and returns thereto again after passing via branch paths is constructed. To achieve this objective, a cutter 25 is provided between two blade-type terminal fittings 20a, 20d of a joint connector 10, and a main wire Waa is connected with the two blade-type terminal fittings and cut therebetween by the cutter 25. By connecting a branching connector 40 with the joint connector 10, branch terminal fittings 41a, 41d are connected with the blade-type terminal fittings 20a, 20d. Since all main wires forming a wiring harness WH are allowed to have the same length and to be bundled together, there is no problem in producing and handling the wiring harness WH.

Abstract: A cable connector comprises a terminal assembly, an upper terminal cover, a lower terminal cover, a plurality of insulation displacement terminals each having an attachment member for piercing through cable, and a conductive member wherein the conductive member includes a plurality of unit bodies each having a hole matingly engaged with a corresponding attachment member of terminal. Further, a connection point is connected between two adjacent unit bodies. As such, conductive member may be divided into a plurality of units by breaking connection points. In assembly, break conductive members into units for securing on terminal covers. Secure cable on terminal covers. Engagement mechanism secures upper terminal cover, terminal assemblies, and lower terminal cover together. Attachment members of terminals pierce through cable to engage with holes of conductive member. This can provide a good electrical contact and enhance the structural strength of connector.

Abstract: The present invention relates to a low-current outlet comprising: an outlet base (2) provided with contact pins (25) to which a plug can be connected by engaging it along a given plug-in axis; and an organizer cap (1) that can be mounted on the outlet base (2), which cap (1), on being fixed to the base, establishes the electrical contact between the conductor wires (31, 32) of a connection cable (3) and the contact pins (25) of the base (2), the cap (1) being provided with wire guides (11, 12) making it possible to position the wires (31, 32) in three dimensions repetitively and separately so that they are connected electrically to the contact pins (25) on fixing the cap (1) to the base (2); said low-current outlet being characterized in that the cap (1) can be mounted onto the low-current outlet (2) from the rear and along said plug-in axis.

Abstract: There is provided an insulator displacement type waterproof connector for an insulated electric wire. The connector includes a terminal and a first housing which surrounds the terminal. The terminal includes an insulator displacing portion. The first housing includes a first through hole opposite to the insulator displacing portion of the terminal. The connector further includes a pressure body inserted in the first through hole of the first housing in a temporarily retained position. The pressure body is movable from the temporarily retained position to a regularly retained position to pressure contact the insulated electric wire with the insulator displacing portion. Preferably, the connector further includes an a second housing which accommodates the terminal. The second housing is fitted in the first housing. The second housing includes a second through hole opposite to the insulator displacing portion of the terminal.

Abstract: An electrical receptacle for electrical connection to insulated electrical conductors comprises a dielectric housing (12) including a first housing section (22) and a second housing section (24); first and second electrical contact members (38, 40) disposed in the dielectric housing (12) and having first contacts (38b, 40b) in alignment with slots (26, 28) of the dielectric housing and second contacts (38a, 40a) in alignment with openings (58) of the dielectric housing including insulation-displacement contacts; and conductor-moving members (16, 18) associated with the insulation-displacement contacts-for moving the insulated electrical conductors into the insulation-displacement contacts thereby effecting electrical connections between the insulation-displacement contacts and the insulated electrical conductors.

Abstract: The device comprises a casing, with a passage for introduction of an end portion of the sheathed wires, a catch for receiving the said end portions in the casing, a clip (12) arranged to be introduced into the casing transversely to the sheathes, with at least two slots (13) to grip the sheathes of the wires and to draw them towards the inside and the bottom of the casing and arranged to cooperate with the catch in order to strip the wires. Spacing means (52, 53) are also provided between the catch and the gripping and drawing clip (12) to keep their spacing greater than a cutting threshold.

Abstract: Connector assembly (10) includes a wire carrier section 14 pivotably mounted to a housing (12) and adapted to be mounted directly to a circuit board without separate fasteners to terminate a discrete wire (180) to a contact (24) that is electrically connected to the board. A wire end (182) is inserted into a respective passageway (16,18) of the wire carrier 14, and the wire carrier section (14) is pivoted toward housing (12) pressing the wire into a slot of an IDC section (26) of the contact. The compact profile occupies minimal board real estate.

Abstract: The insulation displacement connector provides top access to facilitate insertion of conductors for interconnection with a sliding action. The top access slideable connector comprises a channel-shape conductive terminal having at least one key-hole opening and tails for wire wrapping, a channel-shape housing comprises an upper surface and an interior panel, both the surface and the panel each having at least one corresponding opening in axial alignment with the other and correspond to the key-hole and a base plate with a plurality of openings through some of which the terminal tails extend from. The housing receives the terminal and is slideable mounted onto the base plate with latching members. When the corresponding surface, panel and the larger part of the key-hole openings are in alignment, a conductor is inserted through the three corresponding openings.

Abstract: A strain relief housing for use in a communication plug terminating a cable carrying a plurality of conductors. The housing includes a plurality of prongs for segregating the conductors from a cable that is received through a passage in the housing. Means for anchoring the cable in the passage serve to effectively eliminate stress on the electrical connections with the conductors inside the plug. In a preferred embodiment, the strain relief housing segregates the conductors in a substantially circular array, largely conforming to the arrangement of the conductors in a round cable.