A cable includes a line and a coupling housing. The line includes a plurality of cores and a sheath. The sheath is radially outwardly disposed relative to the cores. Each of the cores has a conductor and an insulation surrounding the conductor. Each of the conductors is stripped of the insulation at an end of the cores. A coupling housing including a coupling ring, a pin housing, and a sealing element. The coupling ring embraces the pin housing and the sheath and is fixed to the sheath. The pin housing surrounds the stripped ends of the conductors. The sealing element is disposed between the coupling ring and the pin housing. The conductors are formed of a solid and coated steel wire and the stripped ends of the conductors are useable as pin contacts.

A cable includes a line and a coupling housing. The line includes a plurality of cores and a sheath. The sheath is radially outwardly disposed relative to the cores. Each of the cores has a conductor and an insulation surrounding the conductor. Each of the conductors is stripped of the insulation at an end of the cores. A coupling housing including a coupling ring, a pin housing, and a sealing element. The coupling ring embraces the pin housing and the sheath and is fixed to the sheath. The pin housing surrounds the stripped ends of the conductors. The sealing element is disposed between the coupling ring and the pin housing. The conductors are formed of a solid and coated steel wire and the stripped ends of the conductors are useable as pin contacts.

An electric circuit providing a ground connection includes at least two brushes and a contact member, wherein each brush and the contact member form a sliding contact, wherein the contact member is connected to a ground potential by at least one of the sliding contacts, wherein at least two of the sliding contacts are connected to a current source adapted to provide a current through the sliding contacts.