Cable lead-in

Abstract

A cable lead-in including an upper part and a lower part. The upper part and the lower part are clamped together by a threaded joint in an opening in a wall on a casing around current conductors, which are connected via an electric cable to other current conductors outside the casing. The upper part is formed with a through duct, which has an outer funnel-shaped duct section and an inner threaded section. A seat for a sealing ring is formed between these two sections. A nipple having a strain relief strap is screwed into the threaded section, whereby the sealing ring is pressed sealingly against both the seat and the cable. The funnel-shaped duct section serves to protect the cable against damage by bending in operation. The nipple has a hexagonal head, and at least one of a plurality of blind holes in the upper part accommodates a self-tapping screw whose head is spaced closely from one of the faces of the hexagonal nipple head. This protects the nipple against rotation, which might cause the passage of the cable through the sealing ring to become non-tight. All the components of the cable lead-in are well protected behind the wall of the casing while only a relatively low flange on the upper part is present on the outer side of the wall. In practice, this flange cannot be broken off or offer a foothold to a person who might try to stand on the flange.

Dependencies are inferred from the claim text.