According to embodiments of the present disclosure, the adapter is a single-component injection-molded part with a gasket that is subsequently inserted into the adapter and secured on the adapter with a cap. This embodiment may be less expensive but requires slightly more assembly effort.

According to embodiments of the present disclosure, the seal is improved in that the gasket is arranged on the adapter end facing the insulation of the conductor and a sealing tip with an undercut is provided at the adapter end facing the exposed end of the conductor. Here the end segment of the sealing tip hugs the PVC or silicone insulation. A tip forming the undercut engages at the area of transition from crimps or other conductive materials of the electrical conductor to the insulation or it is compressed into the insulation.

According to embodiments of the present disclosure, the gasket consists of a thermoplastic elastomer or silicone, whereby it can closely hug the insulation of the electrical conductor. If the gasket additionally contains a sealing ring with a plurality of sealing lips, the seal can be further improved by a succession of several sealing zones.

The electrical bonding of busbars is particularly demanding as they are frequently made of aluminum to reduce weight. The sealing according to embodiments of the present disclosure can be applied here, particularly if the busbar functions as a contact element along the lines of the present disclosure.