An electric wire protecting device is used in order to be capable of being installed in a narrow wiring area like one in a small aircraft, and to minimize a risk of an electric arc inside electric wire bundles at low costs. To this end, the electric wire protecting device includes: power wire groups each of which is an assembly of one or more power wires at the same potential; a tape for binding the power wire groups at different potentials from one another into one bundle at a constant pitch; and a spacer extending in a direction of extension of the power wire groups, and inserted in boundaries between the power wire groups.

Methods and systems for a dielectric material coated busbar are provided. In one example, a conductive material may be formed into a shape of a busbar and portions of the busbar may be selectively coated with a dielectric material which may be both electrically insulating and thermally conductive. The dielectric coated portions of the busbar may dissipate heat to a heat sink via a thermal interface material compressed on the busbar.

A heat dissipation structure comprises a flexible substrate, a graphite sheet, and a heat insulating material. The flexible substrate comprises a first surface and a second surface facing away from the first surface. The graphite sheet is connected to the second surface. At least one containing cavity is defined on an interface between the second surface and the graphite sheet. The heat insulating material is filled in the at least one containing cavity to form a heat insulating structure.

A sound-absorbing material obtained by stacking nonwoven fabrics that has a structure for both maintaining its sound-absorbing performance and providing flame-retardancy. The sound-absorbing material is obtained by stacking a base material made of nonwoven fabric and a surface material made of nonwoven fabric, in which a flame-retardant material made of nonwoven fabric having a density that is higher than those of the base material and the surface material is disposed between the base material and the surface material. Also, a wire harness is provided with the sound-absorbing material in which the wire harness and the sound-absorbing material are integrated with each other by covering at least a portion of the wire harness extending in an axial direction, with the sound-absorbing material.

A conductive composition can include a polyolefin base polymer, a high structure carbon black and a low structure carbon black. The conductive composition can exhibit two or more of a thermal conductivity of about 0.27 W/mK or more when measured at about 75 C., a volume resistivity of about 75 ohm-m or less when measured at about 90 C. and an elongation at break of about 300% or more. Cables having coverings formed of such conductive compositions and methods of making such cables are also described herein.

The invention relates to the skin-effect based induction-resistive heating units and can be used in devices intended for prevention of paraffin-hydrate deposits formation in oil-and-gas wells and pipelines, as well as for warming up of viscous products in pipelines and vessels for the purpose of their transporting and pumping. The skin-effect based heating cable contains the center conductor, the inner insulation layer and the ferromagnetic outer conductor coaxially located around them. The invention enables to simplify using due to increase of the heating cable flexibility and due to reduce the energy consumption at its operation.

A conductive composition can include a polyolefin base polymer, a high structure carbon black and a low structure carbon black. The conductive composition can exhibit two or more of a thermal conductivity of about 0.27 W/mK or more when measured at about 75 C., a volume resistivity of about 75 ohm-m or less when measured at about 90 C. and an elongation at break of about 300% or more. Cables having coverings formed of such conductive compositions and methods of making such cables are also described herein.

A core wire set comprising a first core wire, a second core wire arranged in parallel to the first core wire, a first covering layer covering the first core wire and the second core wire, a second covering layer, and a bare metal wire is provided. Wherein the second covering layer covers the first covering layer and a wire placement space is formed between the first covering layer and the second covering layer. Wherein the bare metal wire is arranged in the wire placement space.

A heat-dissipation structure includes a first carbon nanotube layer and a thermal interface material layer. The first carbon nanotube layer and the thermal interface material layer are stacked on each other. The first carbon nanotube layer includes at least one first carbon nanotube paper, and the density of the first carbon nanotube paper ranges from about 0.3 g/cm.sup.3 to about 1.4 g/cm.sup.3. An electronic device applying the heat-dissipation structure is also disclosed.

A cable heater assembly includes a cable heater and an adapter system. The cable heater includes an outer sheath and a conductor. A portion of the conductor is exposed from the outer sheath. The adapter system includes an adapter body mounted to an end of the cable heater and a cap joined to the adapter body to enclose the portion of the conductor inside the cap.