Abstract: A tubular channeling unit including a grounded external metal sheathing and an internal longitudinal cavity, and method for laying such a tubular channeling unit by suspension on a high voltage aerial power line system including at least two towers supporting a set of high voltage electrical conductors suspended from the towers at a specified height above the ground and at a minimum predetermined safety level.

Abstract: The invention concerns a method of installing a telecommunication cable (3) on a supporting cable (1), particularly on a ground or phase cable of a high voltage overhead line, whereby the telecommunication cable (3) is laid along the supporting cable (1) and is attached thereto in undulating form with the help of attaching elements (5; 11; 13; 15). This arrangement makes it possible to make repairs in a simple way on the supporting cable (1) and the telecommunication cable (3).

Abstract: A mast clamp assembly including a strap, a drop wire clamp, and a hook. The ribbon-like strap forms a loop which engages a utility pole or mast. The drop wire clamp includes a clamp for clamping to the drop wire and a loop which engages the hook. The hook includes a back wall and first and second side walls. The loop of the drop wire is received in loop mounting slots in the side walls and engages a protrusion on each side wall. Each side wall also has a strap mounting opening having a triangular-shaped lower portion and a rectangular-shaped upper portion. The hook is mounted on the strap by inserting the strap, bottom edge first, through a slot in the back wall into the lower portion of the strap mounting openings and rotating the hook around the strap such that the upper edge of the strap rotates into the upper portion of the strap mounting opening and the strap engages the hook back wall.

Abstract: Adaptable, line vibration damping/sag adjustment devices are provided with hollow regions that facilitate drilling of larger holes in the devices so that the devices can hold and clamp lines having correspondingly large diameters.

Abstract: The aerial terminal has a tray assembly having zero, one, or more holes for paired-conductor drop wires, as well as one or more converter holes for converters (e.g., baluns), each of which allows signals over an additional conductor pair to be converted and sent through a coaxial-cable drop wire. The tray assembly enables the aerial terminal to be used to distribute to customers both communication signals and broadband signals carried by a multi-wire distribution cable. In a preferred embodiment, the tray assembly of the present invention is designed to replace the grommet trays of prior-art Flexterm.RTM. 5000 Aerial Terminals by Lucent Technology, Inc., that are already in service, without disturbing any of the connections between the distribution cable and the terminal block of the existing aerial terminal.

Abstract: A transmission line hanger is provided for attaching a corrugated transmission line to a supporting structure. The hanger includes a first section adapted to engage a first side of the transmission line and a second section adapted to engage a second side of the transmission line. The first and second sections define an inner generally cylindrical the gripping ribs forms a protrusion extending radially inward from the inner generally cylindrical surface. The gripping ribs are spaced to fit into corresponding recesses in the corrugated outer surface of the transmission line.In another embodiment, the hanger further includes a snap clasp having two elements. The first element is a lip on the exterior of the hanger. The second element is a latch having three sides.In still another embodiment, the hanger includes a first alignment pin and a first mating recess on the fist section and a second alignment pin and a second mating recess on the second section.

Abstract: A load-breaking and load-returning apparatus and method of breaking and returning a load are provided for quickly breaking and returning a load to portions of a power line. The apparatus preferably includes at least one power line jumper cable including first and second cable ends and a first connector connected to the first cable end of the at least one power line jumper cable for connecting the at least one power line jumper cable to a portion of a power line. A load-breaking and load-returning device is preferably connected to the second cable end of the at least one power line jumper cable for quickly breaking and returning a load to portions of a power line responsive to a user thereof. The load-breaking and load-returning device preferably includes a second connector for connecting the load-breaking and load-returning device to a portion of a power line.

Abstract: A clamping mechanism for mounting a circuit conditioning monitoring device to electrical cables of various diameters includes a fixed sleeve and a movable sleeve positioned within the fixed sleeve. Both sleeves include gaps whereby an electrical cable may be pasted therethrough. The inner movable sleeve further includes a clamping means, preferably a tightening screw, whereby after a cable is passed through the gaps, the inner sleeve rotates within the outer sleeve to close the gap and further clamps onto the cable for secure mounting of the device.

Abstract: A utility cross arm assembly for supporting electrical wires from a utility pole. The entire assembly is constructed from insulative materials. It is provided with easily replaceable wire support members or protective caps to enhance convertibility from a single phase delivery configuration to a three phase delivery configuration. The assembly frame provides left and right cross arms with an upper support neck. Various arms and legs provide structural support and a way to mount the assembly to the utility pole. Large open spaces between the arms and legs provide a lightweight construction with low air resistance upon mounting to the utility pole.

Abstract: An aerial rat/rodent guard for residential/commercial utility wires and cables and the like. A barrier plate manufactured from lightweight, non-conductive, smooth surfaced materials molded into a tear drop shaped plate. The center slot is located above the center of gravity allowing the plate's upright position. Removable grommets in the center slot provides the size of the center slot to be adjusted to the size of the utility wire upon which it hangs. A slit opening from the center slot downward to the bottom of the plate provides easy installation. Weight molded into the bottom quarter of the barrier plate allows the barrier plate to return to an upright position if tampered with by a rat/rodent. With the slit closed, a tail clip is attached to the bottom of the barrier plate which locks the slit in a closed position. Once mounted on the wires or cables, without the necessity of tools, the aerial rat/rodent guard does not need to be removed.

Abstract: An overhead-line mast includes a bar-shaped and insulated mast head, current-carrying conductors fastened to insulators of the insulated mast head and a ground conductor disposed on a mast tip of the insulated mast head. The ground conductor is connected electrically to a neutral point on a mast base by a ground conductor connection extending in the interior of the overhead-line mast. The ground conductor connection is sheathed by an insulating layer. The insulating layer is covered in each case by an insulating cone at the level of the current-carrying conductors. An annular electrode extends in or on each insulating cone. An insulating filler is inserted between the insulating layer and the insulating cones on one hand and the insulators of the insulated mast head on the other hand.

Abstract: A clamp for an overhead line including a clamp body in which a first gripping groove for gripping the overhead line is formed; a clamp cap in which a second gripping groove for gripping the overhead line is formed and which is pivotably attached to the clamp body via a hinge unit; a fastening unit for fastening the clamp body and clamp cap in a manner enabling free opening and closing so that the overhead line is affixed between the first and second gripping grooves so as to be unable to move in an axial direction at the pivot position of the final fastening state; and an expansion unit for causing the clamp cap to stop at a position where it is forcibly kept open by a predetermined clearance from the clamp body against a fastening force given by the fastening unit so that the clamp body and the clamp cap are not located at the pivot position of the final fastening state and in addition so that a clearance is formed between the first and second gripping grooves and the overhead line and a method for attachmen

Abstract: A device for opening of an electrical wire insulating cover allowing access to the interior walls of the insulating cover for purposes of inspection or cleaning. A preferred embodiment teaches a one piece rigid structure formed from a first wall having a semi-circular longitudinally rolled shape spaced apart from a second sidewall having a mirror shaped semi-circular longitudinally rolled formation wherein each sidewall forms a partial cavity allowing for placement of the leading edge of an electric insulating cover. The sidewalls are spaced apart by use of either an adjustable or fixed saddle portion which is used in biasing the outer surface of the insulating cover while the leading edges of the cover are placed within partial cavities. Upon placement, the insulating cover is maintained in an open position allowing inspection of the interior chamber.

Abstract: A drop cable arrangement in which a carried line (9) is supported by a strength member (3), the carried line being attached to the strength member via a tubular member (7) that is a sufficiently loose fit around the strength member to permit relative longitudinal movement therebetween. In the event of additional loading on the drop cable the strength member extends due to the increased tension, but this tension is not transferred to the carried line due to the permitted relative movement of the tubular member and strength member.

Abstract: An apparatus and method for increasing electrical clearances on power lines to increase the conductor to structure clearance and insulation length and the conductor clearance to ground and other underlying objects. The apparatus may be applied live-line and can be installed without significantly modifying existing support structure. A suspension insulator string extends vertically from the tower and a yoke plate is connected to the bottom thereof. First and second insulator strings extend outwardly in opposite directions from the yoke plate with a dead end strain clamp attached to an outer end of each insulator string. The dead end strain clamp of each insulator string, dead ends the electrical conductor forming an upgrade loop therebetween. A post insulator is rigidly mounted on the yoke plate and extends from the yoke plate to the conductor upgrade loop intermediate to the outer ends of the first and second insulator strings.

Abstract: An anchor device for an optical cable comprises an anchor clamp for anchoring an optical cable, which is extended along power transmission lines stretched between iron towers, to an iron tower associated therewith, and a semiconductive ring having a predetermined volume resistivity and having a rounded external shape. The semiconductive ring is fixed on the outer peripheral surface of the optical cable in contact with an end of a reinforcing rod of the anchor clamp opposite the tower. By attaching the semiconductive ring, it is possible to lessen the intensity of the electric field of the power transmission lines in the vicinity of that end of the anchor clamp.

Abstract: An electrostatically charged animal barrier for the protection of electrical bushings and other types of electrical equipment which utilizes a plurality of radially extending spokes fabricated from conducting material. These spokes may be secured within the bushing material itself, or may be carried by an annular support of non-conducting material which is removably secured about the longitudinal axis of the bushing. The inner side of the annular support includes a number of small projections to space the support from the bushing so as to provide a passageway for condensation and rainfall. Current flow through the conductor within the bushing creates an electrostatic charge on the spokes sufficient to discourage an animal from attempting to climb around the barrier.

Abstract: An electrical overhead cable includes: cabled electrical conductors (3); tensile strength support elements (1, 2); and optical waveguide elements made of metal coated tubes (4) containing optical fibers (9). The metal coating on the optical fiber-containing tubes is a thin, self-enclosed metal layer (5), which is in direct contact with the surface of the tube (4).

Abstract: An easily-installable support capable of accommodating a wide variety of fiber optic cables is disclosed. The fiber optic cable support uses a one-piece, variable diameter mechanism for cushioning and spacing the supported cable. The support is also contoured to increase the surface area available to contact a utility pole or other structure and includes one or more cleats or gains which provide additional contact strength by biting into and gripping wooden or similar poles. The support is designed to provide approximately constant compressive pressure to the supported sections of a length of cable and sufficient pressure to avoid the need to apply grit or other loose friction-increasing substances to the cushion interior. Because it is of relatively constant or slowly varying cross-section, the support can be die formed with minimal disruption of the fluid flow within the die.

Abstract: Disclosed is a deicing device for deicing cables. The deicing device includes one pair of conductive wires connected to and helically wound along the cable. The conductive wires are connected at one end to a pulsing device which generates an electromagnetic pulse within the wires, and are connected together at the other end. Upon a passage of the electromagnetic pulse in the wires, a repulsive force is created between the wires, which shakes the wires and shatters the ice that may be attached to the cable.

Abstract: A cable clamp for holding a cable suspended from a support comprises a shell member having a mouth opening for the passage of the cable and first and second elongated inner abutment surfaces against which first and second portions of the cable received through the mouth opening are adapted to bear. The shell member also has a planar wall and a side opening defined by elongated walls which extend transversely to the planar base wall. A movable wedge is attached to the planar base wall for limited guided movement and retention within the shell member. The wedge is attached to the shell member by a tongue, which projects outwardly from the base wall and into a guide slot formed in a side wall of the wedge.

Abstract: An improved suspended line cable breakaway device includes a first body portion for connecting to a first end of a support cable and a second body portion for connecting to a second end of the support cable. The first body portion includes resilient fingers having nubs, which are releasably received by slots contained in a cavity wall of the second body portion. A biased spreader, slidably contained in a cavity in the second body portion, is displacable axially along the cavity by an external force along the support cable to urge the nubs outwardly such that the second body portion is disengaged from the first body portion, simultaneously disconnecting component lines of a first end of a suspended line from corresponding component lines of a second end of the suspended line. A shield protects the component line connections, which are spaced internal to the device, from the elements.

Abstract: A grounding device is automatically operable to create a short circuit in the event of a mechanical fault on a pole line. The grounding device is placed below, and close to, each phase line on a pole line. When the phase line moves down, because of a broken wire or the like, the wire engages a sensing member which moves down and causes projection of a grounding tongue. The sensing member has surfaces that direct the wire to a contact area; and, the wire moves the sensing member down, causing projection of a grounding tongue, which will contact the phase line. Before actuation, the tongue, and all portions at ground potential, are enclosed within an insulating housing. A transmitter may also be actuated to broadcast the location of the grounding device.

Abstract: A shield member for attachment to a conventional insulative line stick as used by power linesmen and other electrical staff working on high voltage distribution lines protects the user of a line stick when closing cut-out assembly doors and engaging in similar activities. The shield member protects against the ejection of fuses or the blowing out or explosion of fuses. The shield member, in the form of a plate, clips onto the line stick, for example, by spring clip members attached to one arm of a bracket, another arm of the bracket being attached to the shield member.

Abstract: A device for facilitating integrity of an electrical interconnection of a pair of electrical suspended conductor cables includes a flexible conductive loop and a tension retainer between the cables. Free adjacent spaced apart ends of the cables are connected to the loop, the loop being electrically in series with the cables. A tension retainer is in series structurally with the respective adjacent and spaced ends of the two electrical conductor cables and maintains a first position of suspension. Axial tension on at least one of the cable tending relatively to separate the cables causes movement or breakage of the tension retainer thereby permitting the flexible conductive loop to move and expand and retain electrical integrity between the cable ends in a second suspended position.

Abstract: Potentially harmful electromagnetic radiation associated with high voltage power transmission lines is reduced or minimized by splitting the current delivered to a load between at least three conductors, and by maintaining a specific spatial relationship between the respective conductors. Single phase transmission at reduced radiation may occur using three or four conductors spatially positioned, as viewed in a cross sectional plane, in a horizontal line or a rectangular array, respectively. Three phase transmission at reduced radiation may occur using five or six conductors spatially positioned in the corners of a rectangular array, with one conductor in the center, or a hexagonal array, respectively.

Abstract: A top shield arrangement for elongated filter traps, comprising an elongated sleeve member adapted to receive through one and thereof at least one filter trap such that the filter trap lies completely inside the sleeve member. The sleeve member is formed at the other end thereof for preventing withdrawal of the filter trap from the other end. A wafer seal is inserted into the sleeve member at the one end of the sleeve member for preventing unauthorized removal of the filter trap from the sleeve member through the one end thereof. The top shield arrangement of the invention protects filter traps against tampering by unauthorized persons.

Abstract: Apparatus for and a method of using a temporary transmission hot line crossarm to replace or repair an existing transmission hot line crossarm. The apparatus includes parts to support energized transmission line conductors and parts which support the apparatus. A boom with insulators and hooks attached supplies the mechanism to support the conductors and a lifting ring and sling supply support for the boom. The temporary transmission hot line crossarm enables repair work to be done without deenergizing the transmission lines.

Abstract: A clamp comprises a split sleeve provided with a mooring element and a conical recess with a slight slope in which a compressible core is mounted to a slide exhibiting a cavity for housing of the electric conductor or its carrying cable. The slide has an outside shape complementary to that of the recess of sleeve and which can be wedged by sliding in the latter. At least one longitudinal portion of the wall of cavity the central core, provided for housing the carrying cable of conductor and, preferably, each of the two diametrically opposite longitudinal portions of this cavity, consists of a metal bar inserted in this wall and whose free face is provided with teeth.

Abstract: A long-distance transmission fiber optic cable system suitable for outdoor aerial installation includes a continuous length of non-metallic messenger cable with an aramid fiber, tension load bearing core and a predetermined tension load bearing strength and a polymer outer jacket adapted for outdoor exposure and a continuous length of fiber optic cable, longer than the continuous length of non-metallic messenger cable and including a plurality of fiber optic waveguides within an outer polymer jacket adapted for outdoor exposure and having a tension load bearing strength less than the predetermined tension load bearing strength, and preferably non-metallic, helically wound around the continuous length of the non-metallic cable so as to permit free axial movement. Continuous lengths of 40,000 feet or more of the preferred non-metallic messenger cable and fiber optic cables suitable for outdoor use have been made.

Abstract: An adjustable spacer and hanger apparatus is described which may be used to adjust the spacing between two utility pole crossarms and to support an electrical utility line on such crossarms. The adjustable spacer and hanger apparatus includes a pair of bracket members attached to a pair of spaced elongated support members such as utility pole crossarms. Each bracket member includes a threaded stud connector which engages the opposite ends of a rotatable hanger member positioned between such pair of bracket members. The spacing between the bracket members and the support members or crossarms is adjusted by rotation of the hanger member about the threaded connectors. The hanger member is provided with an aperture or fastening ring for attachment to the element being supported, such as one end of an insulator stack supporting an electrical utility line.

Abstract: A bracket useful for supporting and holding fiber optic or other cable to a utility pole, or the like, including the bracket having a base member, a shank portion extending integrally therefrom, being curved so as to center the bracket and held cable over its base member, the upper end of the shank portion being bifurcated, integrally formed into a pair of arms, that extend outwardly into the formation of cradle members that support the cable thereon. Tie members in combination with grommets are useful for holding the cable onto the bracket, at each cradle, and at that location between the pair of bracket arms at the location where they are integrally formed extending from the bracket shank portion.

Abstract: Line for transmitting electric energy, with bundle conductors enclosing into the bundle a metal or dielectric cable incorporating optic fibers for telecommuniation. The cable, in correspondence of each spacer of the bundle, is supported in a position placed on the vertical led through the barycenter of the bundle and at a distance from said barycenter included in a range of .+-.35% of the diameter of the bundle (i.e. the diameter of the circumference defined by the barycenters of the subconductors; + for positions above the barycenter, --for positions below the barycenter). The spacers are set at a mutual distance included between 30 m and 85 m. The optic fibres cable is clamped onto each spacer either by means of bolt clamps forming part of said spacer, or by means of helical armor rods wound around the optic fibres cable and around a cable positioning clamp fixedly connected to said spacer.

Abstract: A grounding mechanism adapted for use with a support assembly suspending an overhead linear member. The grounding mechanism includes first and second leg portions disposed generally perpendicular to each other. The first leg portion has a generally arcuate conformation over its axial length. The second leg portion is angularly disposed relative to the longitudinal axis of the first leg portion so as to extend outwardly from the support assembly through gaps defined between helical rods gripping the linear member. The arcuate conformation of the first leg portion increases in dimension as it extends from a first distal end toward the second leg portion. Reinforcing ribs are disposed at the juncture of the first and second leg portions to strengthen the grounding mechanism. The new grounding mechanism is mounted between the helical rods and the cable within the support assembly.

Abstract: A fibre optic cable is helically wound on to an overhead high voltage conductor, and has an electrically non-tracking outer jacket and is filled with protective material, or has a conductive outer jacket. The cable is guided off the conductor inside a conductive housing, and then to earth potential along the inside of a non-tracking shedded or convoluted tube.

Abstract: A broken conductor guard system for a single neutral power distribution system in which at least one high voltage power conductor is suspended between power poles with a neutral conductor being similarly suspended between the poles vertically below the high voltage conductor includes a broken conductor guard comprising an elongated rod with hook-shaped ends clamped with a clamping mechanism to a single neutral conductor in a horizontal plane and transverse to the neutral conductor. Apparatus is coupled to the clamping mechanism for preventing rotation of the broken conductor guard about the neutral conductor so as to maintain the guard in the horizontal plane.

Abstract: A protection barrier is adapted to be placed on an insulator of a high voltage power pole to prevent a workman from contacting components of the pole when working on an energized conductor. A base plate of dielectric material is formed with a V-shaped slot and is placed on the insulator with the apex of the slot being located between adjacent skirts of a post type insulator. A pair of dielectric locking plates are pivotally mounted on the base plate and when in an open position permit the insulator to enter into the V-shaped slot and when in closed position lock the base plate on the insulator. The locking plates have aligned curved notches which form a generally circular-shaped opening when in closed position and which align with the apex of the V-shaped slot. Curved surfaces of the notches engage the insulator when the base plate is placed thereon to positively move the locking plates into clamping position about the insulator.

Abstract: Methods to achieve catenary sag and shape adjustments that can reduce sags and increase clearances at certain locations of overhead flexible conductors, cables, strands, or wires to underlying lands, roads, waters, and other objects by permanently adding and attaching essentially concentrated weights or weight of certain magnitudes and positions on the said conductors, cables, strands, or wires.

Abstract: A protective container for aerially disposed splice packages of transmission cables comprising an elongate, cylindrical pipe formed of high-strength, projectile-resistant material for containing a transmission cable splice package therein, brackets for attaching the cylindrical pipe to the side of a transmission cable support pole with its longitudinal axis generally vertically disposed, a first generally circular, projectile-resistant top plate fixed to the top of the pipe in close vertically spaced relation to overlie the top opening and provide a peripheral opening at the top of the pipe for passage of air, a second generally circular, projectile-resistant bottom plate removably secured to the bottom of the pipe to close the bottom opening thereof and provide a radially disposed slot therein for passage of a transmission cable into and out of the pipe, and a transverse bolt spanning the diameter of the pipe above the bottom plate to supportably retain a transmission cable splice package within the containe

Abstract: An electric conductor suitable for use in an overhead electrical and optical transmission system comprises a layer or layers of helically wound wires, at least one elongate compartment within and extending throughout the length of the conductor and, loosely housed in the elongate compartment, at least one optical fibre ribbon structure comprising a plurality of optical fibres and flexible elongate reinforcing elements of resilient material arranged side by side and embedded in an elongate body of plastics material, each resilient reinforcing element being set in such a form that the ribbon structure follows a path of smoothly curved undulations whose axes of curvature lie parallel to one another and normal to the longitudinal axis of the ribbon structure.

Abstract: In a carrier relay system in which protective relay apparatus are disposed in terminal stations respectively and interchange information between the terminal stations via a signal transmission line for detecting a trouble occurred in power transmission lines on the basis of the exchanged information, specific information K is inserted in a predetermined position of a signal transmitted from the first terminal station to the second terminal station, and the specific information K is inserted intact in another predetermined position of a signal returned from the terminal station to the terminal station. In the terminal station, the specific information K inserted in the signal transmitted therefrom is compared with the specific information K inserted in the signal returned from the terminal station for deciding the presence or absence of a trouble occurred in the power transmission lines.

Abstract: A broken conductor guard for use in an electrical power transmission system including at least one high potential power conductor positioned vertically above two neutral conductors. The broken conductor guard comprises a conductive rod electrically connected transverse to the neutral conductors. The rod extends a predetermined distance on each side of the two neutral conductors in a substantially horizontal plane such that a broken high-potential conductor will fall on the rod and be short-circuited to the neutral conductors.

Abstract: A guard ring for long distance transmission cables for preventing wet snow from accumulating on the cables. The guard ring consists of two half collars of a hard elastic plastic material integrally joined by a hinge strap at one end and having interlocking hooks at their free ends to form a closed ring that tightly encloses the cable. Beaks or the like are integral with the inner ends of the half collars and face each other in the area of the hinge. The beaks cover a part of the hinge strap from both sides, so that when the half collars are open, they form, together with the hinge strap, a T-shaped groove for conveniently holding the rings in a row, prior to assembly, on a corresponding T-shaped rail. When the half-collars are closed and the ring secured to the cable, the beaks are bent apart a sufficient distance so that the rings can easily be removed from the rail. An assembly tool is also provided for clamping the rings about the cable.

Abstract: An improved method for suspending a gap type steel reinforced aluminum conductor is proposed. A sleeve is mounted on the conductor and compressed so that there will be no gap between the conductive strands and the core. When compressed, grooves are formed in the outer periphery of the sleeve. Armor rods are wound around the sleeve in the grooves. The conductor is then clamped in a suspension clamp.

Abstract: A simple and inexpensive dead end fitting for securing an overhead conductor loosely housing an optical guide to a tower comprises a sleeve of malleable metal or metal alloy, open at each of its ends, for compression jointing to the conductor; a steel termination in screw threaded engagement with the sleeve and having a clevis for securing the fitting to a tower; and a lug welded to the sleeve for effecting electrical connection to a jumper cable. The lug engages in a notch in the adjacent end of the termination to lock positively the screw threaded engagement between the sleeve and termination.

Abstract: A flexible stranded body, such as an electric conductor of an overhead electric transmission or distribution system, comprises at least one stranded layer of elongate elements of metal or metal alloy, at least one elongate compartment within and extending throughout the length of the stranded body and, loosely housed in the elongate compartment, at least one separate optical fibre and/or at least one optical bundle. Preferably, the elongate compartment extends within a circumferentially rigid central core which is surrounded by the stranded layer or layers but it may be a bore in an elongate element of a stranded layer or an elongate space bounded by two adjacent elongate elements.

Abstract: A covered distribution wire is provided with a clamp device having sufficient mass to provide conductor protection against damage from fault current arcs over a section of the conductor where the insulation cover is removed for interconnection or insulator support purposes. The clamp mass is at least a minimum value needed for practicality in usage and otherwise is based on the fault energy to be absorbed from fault arcs in the expected usage.

Abstract: An insulated distribution conductor separated from the substation by one or more fuses is protected from arc damage by a clamp device having sufficient mass to absorb the arc energy and thereby prevent burndown and diameter reduction of the conductor at a point where the insulation covering has been removed. The clamp comprises two members which are bolted together to surround the bare section of the conductor and provide additional heat-absorbing mass at the point where the arc tends to dwell, i.e. at the end face of the insulation covering farthest from the power source.

Abstract: A covered distribution wire is provided with a clamp device having sufficient mass to provide conductor protection against damage from fault current arcs over a section of the conductor where the insulation cover is removed for interconnection or insulator support purposes. The clamp comprises two members which are bolted together to surround the conductor section such that an enlarged disc-like end clamp portion is positioned about the conductor within one and a half centimeters of an end face of the adjacent wire cover. The two members are secured together such that a pair of slots exists between them along opposite sides of the conductor section with splatter barriers located on one end thereof. The slots are tapered with increasing width in the radially outward direction with the minimum width being great enough to avoid weldment and the maximum width being less than that which allows fault arc travel through the slot to the conductor section.

Abstract: A flexible stranded body, such as an electric conductor of an overhead electric transmission or distribution system, comprises at least one stranded layer of elongate elements of metal or metal alloy, at least one elongate compartment within and extending throughout the length of the stranded body and, loosely housed in the elongate compartment, at least one separate optical fibre and/or at least one optical bundle. Preferably, the elongate compartment extends within a circumferentially rigid central core which is surrounded by the stranded layer or layers but it may be a bore in an elongate element of a stranded layer or an elongate space bounded by two adjacent elongate elements.