Self-temperature heating cable working principle and characteristics 
 Self-limiting temperature, with tropical works: filling in the middle of two parallel wires PTC polymer conductive plastic core with polymer plastic substrate material from the skeleton and the role of the filler carrier, inorganic conductor packing is the current carrier is formed in an insulator connected conductive network, since the power flow of heat, to compensate for the heat loss of the pipe. 
 The conductive plastic, temperature rise, thermal expansion, making part of the current channel network gradually disconnected, the current through the reduction, the heat is also reduced. When the temperature rises to a range of conductive plastic current channel due to thermal expansion, almost into the circuit, with tropical power equal to the cut off; at lower temperatures, the core with shrink current channel is reconnected, electric heating cables began to supply heat. This is to automatically adjust the temperature of the principle of self-limit temperature electric heating. 
 Temperature heating cables automatically adjust its output power based on the temperature of the heating, since the temperature characteristics of the product length everywhere exist, therefore, even if the Self-Regulating heating cable overlap installation, do not overheat in the overlapping point. the heating cable can be use any cut length.