LEDNINGSGENOMFORING FOR ELEKTRISKA LEDNINGAR

摘要

That part of the sheath of an electric cable which extends through a hole in the housing of a submersible pump motor is surrounded by a metallic sleeve having end portions of reduced diameter. Such end portions and the adjacent portions of the sheath are surrounded by and bonded to tubular insulators whose maximum outer diameter does not exceed the maximum outer diameter of the sleeve. The insulators may consist of convoluted strip-shaped material or foil which is bonded to the adjacent portions of the sleeve and sheath. The clearance between the median portion of the sleeve and the surface surrounding the hole is sealed by one or more O-rings or by a bolt which is threadedly connected to the housing and surrounds the sleeve, a nut which surrounds the sleeve and meshes with the bolt, and a deformable ring seal which is interposed between the sleeve on the one hand and the bolt and nut on the other hand to be deformed by the nut when the latter is rotated in a direction to receive a larger portion of the bolt.