Abstract: Bushing for the passage of at least one cable through a hole in a wall or similar structure, affording protection against electromagnetic overload and/or interference which bushing comprises two cable lead-through tubes which are each provided with a flange at its end which are detachably connected together with the aid of these flanges, while at least one earth plate is disposed between these flanges and electrically coupled therewith through a conductor in order to contact an electrically conducting braiding of the cable(s) passed through when the bushing is fully operational.

Abstract: A sealing device for sealingly connecting two coaxial conduits and the like of a conduit arrangement including a first conduit and a second conduit, wherein the second conduit is disposed a predetermined distance in the first conduit to provide between them an annular space adapted to receive the sealing device. The sealing device includes first projections and second projections, respectively, on the outer diameter and on the inner diameter whereby the projections on the inner diameter and the projections on the outer diameter are arranged at least in part in a common radial section of predetermined axial length. The outer diameter of the outer projections is greater than the inner diameter of the conduit having the greater inner diameter and the inner diameter of the projections arranged on the inner diameter of the sealing device are at most equal to or at least nearly equal to the outer diameter of the conduit having the smaller outer diameter.