Abstract: In effecting a fluid-tight seal between a plastics part of a cable joint or termination enclosure and the plastics sheath of an electric cable a hole is formed in the wall of said part to form a cable entry of a size appropriate to the cable and a length of the cable is passed through the cable entry so formed. A mould is assembled about the cable adjacent a surface of said part, which mould embraces the cable and has ports for the admission and discharge of molten thermoplastics material, and the mould is temporarily secured to said part of the enclosure.

Abstract: In a method of making a connection between a plastics sheathed cable and an enclosed cable joint or termination, the enclosure is opened up to expose the existing conductor joint or termination and a separately formed plastics part of the enclosure that includes an end wall is removed. A new part of plastics material including an end wall which has at least one hole of a size appropriate to a cable at said end of the existing joint or termination and which is split between said hole and the peripheral edge of said new part, is applied to the or each cable sheath at said end of the joint or termination. A length of said plastics sheathed cable is passed through a further hole in the end wall of said new part and its conductor or conductors connected to at least one conductor of at least one of the cables of the existing joint or termination.

Abstract: An enclosure is assembled about an electric cable joint or termination by applying about the cable or cables a plastics sleeve slit therethrough its length and enclosing the adjacent pair of longitudinal edges of the sleeve in a mould which has ports for the admission and discharge of molten thermoplastics material. Molten thermoplastics material that is compatible with the plastics material of the sleeve and that is at a temperature appreciably above the softening point of said material is injected into the mould through at least one port and, after a sufficient quantity of molten thermoplastics material has passed through the mould to soften the surfaces of said longitudinal edges, the molten thermoplastics material in the mould is permitted or caused to cool and make an effective bond between said longitudinal edges. The sleeve is then sealed to adjacent separately formed end parts of the enclosure.