The invention relates to a device comprising a cable and/or a cable accessory, said cable and/or cable accessory containing at least one insulating and fire-resistant layer, as well as to a method for manufacturing a cable and/or accessory of said type.

An insulated wire or cable is made by a process comprising the steps of: (A) extruding onto a covered or uncovered metal conductor or optical fiber a composition having a DF measured at 130° C. (60 Hz, 2 kV) or 120° C. (60 Hz, 8 kV) or 100° C. (60 Hz, 8 kV) of ≤0.5% and comprising: (1) a high melt strength ethylene-based polymer made in a tubular reactor, and (2) a peroxide, and (B) crosslinking the high melt strength ethylene-based polymer.

A method for contacting a wire (1), in particular an aluminum wire, with a connecting body (4), in particular with a plug of a coil body (5), comprising the following steps: connecting the wire (1) materially to the connecting body (4) at at least one point (2, 3); after connecting, enclosing a connecting region including the at least at one point (2, 3) is by a shrink tube (6) with an inner glue (7), the shrink tube (6) encompassing the connecting body (4).

A cable includes: a conductor including strands densely arranged, the strands including out most strands located at outermost parts of the conductor and inner side strand located on inner side of the outermost strands; and an insulation covering that covers the periphery of the conductor. The insulation covering is in surface contact with the outermost strands, and is provided in a manner such that gaps are provided between the insulation covering and the inner side strands. In the method for manufacturing the cable, a fluid resin having a viscosity of greater than or equal to 323.6 Pa.Math.sec at the point of extrusion is used, and the extrusion pressure of the resin is adjusted in a manner such that the insulation covering is in surface contact with the outermost strands and such that gaps are provided between the insulation covering and the inner side strands.

A cable separator comprising a preshaped article having a longitudinal length, wherein said preshaped article is substantially entirely formed of a foamed polymer material having a glass transition temperature greater than 160° C. and being halogen-free is provided. A data communications cable comprising a plurality of conductors and the cable separator of the present invention, wherein said cable separator separates the plurality of conductors is provided. A method of manufacturing a cable comprising the separator of the invention is also provided.

A cable separator comprising a preshaped article having a longitudinal length, wherein said preshaped article is substantially entirely formed of a foamed polymer material having a glass transition temperature greater than 160° C. and being halogen-free is provided. A data communications cable comprising a plurality of conductors and the cable separator of the present invention, wherein said cable separator separates the plurality of conductors is provided. A method of manufacturing a cable comprising the separator of the invention is also provided.

A high voltage alternative current cable is provided having mechanically reinforced electric conductor, by having a reinforcement member at the centre of the conductors of the cable, where the reinforcement member is made of one or more low or non-magnetic steel wires, one or more wires of CuNiSi precipitation alloy, or one or more aluminium wires made of an EN AW-1xxx, EN AW-2xxx, EN AW-5xxx, AW-6xxx, EN AW-7xxx, or EN AW-8xxx alloy, according to the European aluminium standard.

A high voltage alternative current cable is provided having mechanically reinforced electric conductor, by having a reinforcement member at the centre of the conductors of the cable, where the reinforcement member is made of one or more low or non-magnetic steel wires, one or more wires of CuNiSi precipitation alloy, or one or more aluminium wires made of an EN AW-1xxx, EN AW-2xxx, EN AW-5xxx, AW-6xxx, EN AW-7xxx, or EN AW-8xxx alloy, according to the European aluminium standard.

The invention discloses a carbon nanotube/polyetherimide/thermosetting resin dielectric composite and a preparation method therefor. 100 parts by weight of polyetherimide and 1-7 parts by weight of carbon nanotube are mixed uniformly in an Haake torque melt cavity to obtain a carbon nanotubes/polyetherimide composite; 20 parts of the carbon nanotube/polyetherimide composite are dissolved in 100-150 parts of dichloromethane, then the mixed solution is added in 100 parts of molten thermocurable thermosetting resin, mixing, and heat preserving, stirring are performed until a mixture is formed in a uniform state, and curing and post-treating are performed to obtain a carbon nanotube/thermosetting resin dielectric composite, wherein the substrate thereof has a typical reverse phase structure, while the carbon nanotubes are dispersed in a polyetherimide phase. The composite has a relatively low percolation threshold, a high dielectric constant and a low dielectric loss. The preparation method of the present invention has a simple process and is suitable for large-scale production.

A structure for creating a sealed wire bundle includes a first adhesive material in the form of a circular or semi-circular shape. The first adhesive material has a first outer wall with first spoke arms extending inward from the first outer wall. The first adhesive material has a first viscosity. First wire receiving spaces are provided between the first spoke arms. Wires are positioned in the first wire receiving spaces. As heat is applied to the adhesive structure, the adhesive structure flows to fill voids between the plurality of wires to thereby seal the wires.