A cable includes a transmissive core; a jacket surrounding the transmissive core, which has at least an outermost polymeric layer; and an external semi-conductive layer around and in direct contact with the outermost polymeric layer of the jacket. The external semi-conductive layer is made of a composition comprising a base polymer material and an electrically conductive filler. The electrically conductive filler includes carbon nanotubes.

A cable includes a transmissive core; a jacket surrounding the transmissive core, which has at least an outermost polymeric layer; and an external semi-conductive layer around and in direct contact with the outermost polymeric layer of the jacket. The external semi-conductive layer is made of a composition comprising a base polymer material and an electrically conductive filler. The electrically conductive filler includes carbon nanotubes.

A vehicle wiring system includes a plurality of functional units to be mounted in a vehicle, an optical transmission line that is wired between the functional units and configured to transmit an optical signal of the functional units, an electric wire harness that is provided, in a partial section of the optical transmission line, together with the optical transmission line in a state of being integrated with the optical transmission line, and an optical coupler that is disposed in a portion of the optical transmission line other than the section and constitutes a part of the optical transmission line.

A vehicle wiring system includes a plurality of functional units to be mounted in a vehicle, an optical transmission line that is wired between the functional units and configured to transmit an optical signal of the functional units, an electric wire harness that is provided, in a partial section of the optical transmission line, together with the optical transmission line in a state of being integrated with the optical transmission line, and an optical coupler that is disposed in a portion of the optical transmission line other than the section and constitutes a part of the optical transmission line.

A power and communications cable may include an electromagnetic waveguide, an inner metallic tubular surrounding the electromagnetic waveguide, an electrically conductive material surrounding the inner metallic tubular, an electrically insulating material surrounding the electrically conductive material, and an outer metallic tubular resistant to corrosion and abrasion surrounding the electrically insulating layer. The example system may include an electrical device locatable in the wellbore and coupleable to the cable and a control unit coupleable to the cable and operable to supply power to and communicate with the electrical device via the power and communications cable.

A power and communications cable may include an electromagnetic waveguide, an inner metallic tubular surrounding the electromagnetic waveguide, an electrically conductive material surrounding the inner metallic tubular, an electrically insulating material surrounding the electrically conductive material, and an outer metallic tubular resistant to corrosion and abrasion surrounding the electrically insulating layer. The example system may include an electrical device locatable in the wellbore and coupleable to the cable and a control unit coupleable to the cable and operable to supply power to and communicate with the electrical device via the power and communications cable.

A hybrid cable is provided that transmits both electrical power and optical signals. The hybrid cable has a transverse cross-sectional shape with multiple lobes and a generally circular outer boundary. At least some of the lobes surround and insulate the electrical conductors. The lobes surrounding the electrical conductors can be torn away from the remainder of the cable while continuing to insulate the electrical conductors.

A hybrid cable is provided that transmits both electrical power and optical signals. The hybrid cable has a transverse cross-sectional shape with multiple lobes and a generally circular outer boundary. At least some of the lobes surround and insulate the electrical conductors. The lobes surrounding the electrical conductors can be torn away from the remainder of the cable while continuing to insulate the electrical conductors.

An assembly can include a barrel housing having an opened end. The barrel housing can also include a barrel port for mounting a first compression fitting. A racetrack tray can be positioned within the barrel housing. The racetrack tray can receive an optical fiber and an electrical cable of a hybrid cable. A cap can be secured to the opened end of the barrel housing. The cap can include a cap port for receiving a second compression fitting. A primary seal can be positioned in a groove on one of the cap or the barrel housing. The primary seal can create a pressure seal between the cap and the barrel housing.

An assembly can include a barrel housing having an opened end. The barrel housing can also include a barrel port for mounting a first compression fitting. A racetrack tray can be positioned within the barrel housing. The racetrack tray can receive an optical fiber and an electrical cable of a hybrid cable. A cap can be secured to the opened end of the barrel housing. The cap can include a cap port for receiving a second compression fitting. A primary seal can be positioned in a groove on one of the cap or the barrel housing. The primary seal can create a pressure seal between the cap and the barrel housing.