Disclosed are cable types, including a type THHN cable, the cable types having a reduced surface coefficient of friction, and the method of manufacture thereof, in which the central conductor core and insulating layer are surrounded by a material containing nylon or thermosetting resin. A silicone based pulling lubricant for said cable, or alternatively, erucamide or stearyl erucamide for small cable gauge wire, is incorporated, by alternate methods, with the resin material from which the outer sheath is extruded, and is effective to reduce the required pulling force between the formed cable and a conduit during installation.

A wiring harness assembly includes a plurality of electrical conductors having wires enclosed within insulative sheaths that are integrally formed of an electrically insulative material. The assembly also includes a lattice support structure that is attached to the insulative sheaths at multiple locations. The lattice support structure is configured to maintain a desired shape of the assembly. The lattice support structure is formed of filaments that may be formed using an additive manufacturing process The filaments may be arranged such that lattice support structure defines a plurality of hexagonally shaped apertures. A process for manufacturing the wiring harness assembly and an apparatus configured to manufacture the wiring harness assembly is also presented.

A wiring harness assembly includes a plurality of electrical conductors having wires enclosed within insulative sheaths that are integrally formed of an electrically insulative material. The assembly also includes a lattice support structure that is attached to the insulative sheaths at multiple locations. The lattice support structure is configured to maintain a desired shape of the assembly. The lattice support structure is formed of filaments that may be formed using an additive manufacturing process The filaments may be arranged such that lattice support structure defines a plurality of hexagonally shaped apertures. A process for manufacturing the wiring harness assembly and an apparatus configured to manufacture the wiring harness assembly is also presented.

The invention provides an ultra-flexible indoor accompanying photoelectric composite cable, and the cable comprises a plurality of power transmission components, optical fiber transmission components and structural strengthening components, which are covered by a highly flame-retardant outer protective layer. The power transmission component comprises a cable core which is a soft conductor and an insulating material layer wrapped around the cable core. The optical fiber transmission component is a tight tube optical fiber, and the power transmission components and the optical fiber transmission components are arranged in parallel inside the highly flame-retardant outer protective layer. The composite cable of the invention has very strong pressure resistance, stress resistance, and reciprocating resistance, good electrical and physical properties and more excellent environment resistant performance. Furthermore, the composite cable can simplify construction procedures, improve working efficiency and reduce construction cost.

The invention provides an ultra-flexible indoor accompanying photoelectric composite cable, and the cable comprises a plurality of power transmission components, optical fiber transmission components and structural strengthening components, which are covered by a highly flame-retardant outer protective layer. The power transmission component comprises a cable core which is a soft conductor and an insulating material layer wrapped around the cable core. The optical fiber transmission component is a tight tube optical fiber, and the power transmission components and the optical fiber transmission components are arranged in parallel inside the highly flame-retardant outer protective layer. The composite cable of the invention has very strong pressure resistance, stress resistance, and reciprocating resistance, good electrical and physical properties and more excellent environment resistant performance. Furthermore, the composite cable can simplify construction procedures, improve working efficiency and reduce construction cost.

A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein said insulation layer comprises an LDPE homopolymer or copolymer having a density of 927 to 940 kg/m.sup.3 and wherein the conductivity of the LDPE is 5.0 fS/m or less when measured according to DC conductivity method as described under Determination Methods.

A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein said insulation layer comprises an LDPE homopolymer or copolymer having a density of 927 to 940 kg/m.sup.3 and wherein the conductivity of the LDPE is 5.0 fS/m or less when measured according to DC conductivity method as described under Determination Methods.

A method for producing an elongated article with a sheath. The sheath is extruded with a predetermined wall thickness in an extrusion unit. Following the extrusion unit in a feeding direction, a part of the still moldable material is built up with the aid of a molding unit during a molding process such that a molded part forms integrally on the sheath. The molding unit is moved according to the following working cycle: the molding unit is accelerated from a starting position in the feeding direction, then it is advanced in the direction of the elongated article and the molded part is formed, the molding unit is withdrawn from the elongated article, and the molding unit is decelerated and moved from an end position, counter to the feeding direction, back in the direction of the starting position.

A method for producing an elongated article with a sheath. The sheath is extruded with a predetermined wall thickness in an extrusion unit. Following the extrusion unit in a feeding direction, a part of the still moldable material is built up with the aid of a molding unit during a molding process such that a molded part forms integrally on the sheath. The molding unit is moved according to the following working cycle: the molding unit is accelerated from a starting position in the feeding direction, then it is advanced in the direction of the elongated article and the molded part is formed, the molding unit is withdrawn from the elongated article, and the molding unit is decelerated and moved from an end position, counter to the feeding direction, back in the direction of the starting position.

Provided is a semiconductive resin composition which may be used for both an internal semiconductive layer and an internal semiconductive layer of a power cable, and in particular has excellent peelability to be used for the external semiconductive layer. In addition, a novel semiconductive resin composition having improved thermal resistance and mechanical physical properties, and an improved deterioration property is provided. The semiconductive resin composition for a cable includes: 1 to 15 parts by weight of a multiwalled carbon nanotube as a conductive particle, and 1 to 10 parts by weight of an enhancer, based on 100 parts by weight of a composite resin including 10 to 250 parts by weight of an ethylene-(meth)acrylate-based resin and 1 to 100 parts by weight of an olefinic elastomer, based on 100 parts by weight of a polypropylene-based resin.