Pressurized cable termination seal and methods of making

A cable having a seal which comprises:

• a core having a plurality of individually insulated conductors;
• a plastic jacket which covers a portion of the length of the core;
• an elastomeric sleeve disposed about the core with a first portion of the sleeve in engagement with the jacket and with a second portion extending beyond the jacketed length of the core and enclosing an unjacketed length of the core;
• a metallic tube having one portion of its length disposed about and in compressive engagement with said first portion of the sleeve and the jacket, and the other portion of its length being disposed about the individual conductors of the unjacketed length of the core;
• and
• a plugging compound which is compliant with the sleeve and which generally fills the other portion of the tube to encapsulate the individual conductors and said second portion of the sleeve which extends beyond the jacket.

A method of sealing a cable having a core, which includes a plurality of individually insulated conductors, and a plastic jacket, which includes the steps of:

• removing the plastic jacket from an end length of the cable to expose the individually insulated conductors;
• moving a sleeve which is made of an elastomeric material over the cable and positioning it so that a first portion thereof is in engagement with the jacket and so that a second portion extends over the individual insulated conductors of the end length of the cable from which the jacket has been removed;
• moving a metallic tube over the sleeve so that one end portion of the tube is disposed about the first portion of the sleeve and the jacket and the other end portion of the tube is disposed about the second portion of the sleeve and the individual insulated conductors;
• applying forces to the one end portion of the tube to reduce its diameter and to move the tube into compressive engagement with the first portion of the sleeve and the cable jacket;
• and
• filling the other end portion of the tube with a plugging compound which is compliant with the sleeve to encapsulate the individual conductors and the second portion of the sleeve.