Abstract: The present invention relates to a self-adjusting cable of which the material having PTC behavior is an extrudable alloy of compatible polymers of from 20% to 50% of at least one polar polyolefin, of from 50% to 80% of at least one matrix polymer chosen from poly(C1-C4-alkylene) terephthalates, polyamides, polycarbonates, polyester and polyether copolymers, polyketones and methyl polymethacrylates, or mixture thereof, and of from 5% to 15%, preferably 5% to 10% of at least one conductive filler such as carbon black, and optionally non-conductive fillers. It also relates to the process for the production of said self-adjusting cable.