Advances in Multiconductor Jointing Systems for Medium Voltage Solid Dielectric Cables Using Heat-Shrinkable Components

Heat-shrinkable polymeric materials are now being used to reinsulate joints in single- and three-conductor armored cables, particularly on cables used by industry for 15-kV distribution systems. A theoretical evaluation is given of the electrical stress control in the joint insulation system and the development of a joint for three-conductor cables, which eliminates the need for complex fittings. A test program is reviewed and the results reported.