Compression connector performance on oxidized aluminum cable conductors

Oxidized aluminum conductors are often found in overhead and underground distribution systems. Jointing these oxidized aluminum conductors with compression connectors in cable joints can lead to thermal runaway and fire hazard as found in our laboratory experiments. This problem was partly alleviated by the clearing and degreasing processes used in the rejuvenation of the underground cable insulation by silicone injection. It can, however, be eliminated by chemical cleaning.