Abstract: An apparatus and a process of removing moisture in situ from a generally tubular outer insulation jacket about an underground electrical power distribution cable having opposite end zones in combination with a mating terminator in fluid sealing relation on one of the end zones of the cable, the cable including an inner core including a bundle of longitudinal strands of electrically conductive material defining longitudinally extending interstices between the strands, and the core and interstices extending axially through the jacket and having end zones extending axially from the insulation jacket which includes introducing gas at an elevated low pressure relative to ambient pressure directly into the interstices between said conductive strands at one end zone to flow through the interstices within the core without being in direct contact with the outer insulation jacket and out the other end zone of the cable to withdraw moisture and dry the insulation jacket about the core to retard and reduce tree formation