A cable having a transmission wire, a first metal covering layer, an inner insulating layer, a second metal covering layer, an outer insulating layer, an insulating protective layer, and an outer metal layer and method of making such. The transmission wire, a first metal covering layer , and inner insulating layer extend along a first direction, wherein the first metal covering layer and inner insulating layer cover the transmission wire. The first metal covering layer comprises a first axial end part. The inner insulating layer comprises a second axial end part. The second metal covering layer extends along the first direction and covers the inner insulating layer. The second metal covering layer comprises a third axial end part. The outer insulating layer extends along the first direction and covers the second metal covering layer. The outer insulating layer comprises a fourth axial end part.

A shielded electrical cable includes at least two spaced-apart conductors extending side-by-side along a longitudinal cable direction. An insulation electrically insulates the conductors from each other. A cable shield, together with the conductors, extends along the longitudinal cable direction and annularly surrounds the conductors, as seen in cross section. An electrical device is disposed between the conductors and the cable shield. The electrical device is surrounded by the cable shield and disposed on the conductors such that the electrical device is in electrical contact with each of the conductors.

A shielded electrical cable includes at least two spaced-apart conductors extending side-by-side along a longitudinal cable direction. An insulation electrically insulates the conductors from each other. A cable shield, together with the conductors, extends along the longitudinal cable direction and annularly surrounds the conductors, as seen in cross section. An electrical device is disposed between the conductors and the cable shield. The electrical device is surrounded by the cable shield and disposed on the conductors such that the electrical device is in electrical contact with each of the conductors.

A cable includes a first copper conductor and a second copper conductor, and an insulation layer. The insulation layer is formed from a first polymer material, and is a single layer surrounding the first copper conductor and the second copper conductor. A discontinuity formed from a second polymer material is located within the insulation layer, between the first copper conductor and the second copper conductor. The discontinuity provides a weakness within the insulation layer. A jacket surrounds the insulation layer and is made of a third polymer material. A fiber optic ribbon may be located in the cable.

Systems and methods for forming insulation on magnet wire are provided. An extruder that includes one or more rotating screws may receive a thermoset polymeric material and process the thermoset polymeric material to increase its pressure and temperature. An extrusion crosshead assembly in fluid communication with the extruder may receive the thermoset polymeric material and press extrude the thermoset polymeric material as insulation onto a magnet wire. A curing device may then cure the extruded insulation material.

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.

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.

Cable manufacturing method and cable assembly, comprising a transmission wire, a first metal covering layer, an inner insulating layer, a second metal covering layer, an outer insulating layer, an insulating protective layer, and an outer metal layer. The transmission wire extends along a first direction. The first metal covering layer extends along the first direction and covers the transmission wire. The first metal covering layer comprises a first axial end part. The inner insulating layer extends along the first direction and coves the first metal covering layer. The inner insulating layer comprises a second axial end part. The second metal covering layer extends along the first direction and covers the inner insulating layer. The second metal covering layer comprises a third axial end part. The outer insulating layer extends along the first direction and covers the second metal covering layer. The outer insulating layer comprises a fourth axial end part.

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.

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.