Commonly Used TXLPHeating CableThere are two types: one is a single-core wire with both ends connected to "cold wires," forming a loop at the head and tail when in use, known as a single-core heating cable; the other is a two-core wire, with one end connected to the heating wire as a cold wire terminal and the other forming a cold wire loop, known as a double-core heating cable. Since the cable has its own heating function, some also call it a "heating cable."