HEATING CABLE

摘要

According to a first aspect of the present invention, there is provided a self -regulating electrical heating cable comprising: a first power supply conductor (1a) extending along the length of the cable; a second power supply conductor (1b) extending along the length of the cable; a third power supply conductor (1c) extending along the length of the cable; the first and second power supply conductors being in electrical connection with each other via a first electrically conductive heating element body having a positive temperature coefficient of resistance, and the second and third power supply conductors being in electrical connection with each other via a second electrically conductive heating element body having a positive temperature coefficient of resistance, and wherein, in use, the first, second and third power supply conductors are not physically connected to one another.