Unlike single dual heating cable heating cable, which has two internal heater, heating cable into a loop at the end of heating cable, heating cable core can be folded, just connect wiring terminals heating cable is available. Because the dual conductor heating cable itself into a loop, all on the same side all the wiring in the construction, as long as the terminal connection power supply, no wiring the end, according to the specific circumstances of any place, compared with the single-conductor heating cables , greatly reducing the difficulty of construction, more and more people of all ages. Heating cable inner core composed by the cold line hotline outside the insulating layer, grounding, shielding layer and the outer sheath composed of heating cable is energized, hot fever, and in the 40 to 65 degree low temperature operation, buried in the packed bed fever cable, heat by heat conduction (convection) the manner and sent 8-13μm far-infrared radiation heating pop.network body. Dual heating cable structure characteristics: 1, the metal dual lead heater, heating wire, long life, two, armored shield, to ensure safe and effective to overcome the electromagnetic radiation 3, polyethylene outer sheath, corrosion resistance, immersion , temperature 90 ℃ 4, the power cord and the heating cable joints using cold one stealth production, to ensure system integrity of five, nickel alloy single lead heater, heating wire long life 6, the power cord and the heating cable invisible joints, ensure that the system is more secure dual conductor heating cable structure: [2] 1, the core wire (metal heating wire): the core wire having a positive temperature coefficient of resistance of the metal alloy wire composed of linear 18:05 rated watts per meter. 2, the insulating layer: heat insulation heating cable with double insulation structure, the insulating layer directly affects the quality of life of the heating cable, heating cable insulation Ampang temperature through trial and error, at 140 ℃ high temperature resistant High layer deformation, not shrinking. 3, grounding wire: ground wire from the 8 diameter of 0.4mm tinned copper lines. 8 tinned copper wire area of ??1.0048m square meters, in line with the provisions of the International Electrotechnical Commission IEC800 line shall not be less than 1m square grounding requirements. 4, a metal shield layer: in the course of the heating cable, since the current role in the electromagnetic field is formed around the heating cable, if more than 100 micro Tesla fields will be on human health and other electrical impact. Through the effective protection of the metal shield, the electromagnetic field within the core control line, so they can not spread out, and then by the electromagnetic field into the earth ground wire to make the heating cable and the earth formation potential. Pass the test, Ampang power to warm the production process of the electric field strength values ??of national security within 1/1000 (state of the electric field strength is 4000 volts / m, Ampang heating cables measured data is 4 volts / m); magnetic induction highest 13%, the lowest 6% (state of the magnetic induction intensity is 100 Witte Tesla, the measured data for the highest 13 Witte Tesla, Tesla minimum 6 Witt). Far below the national standard, higher than the national safety regulations, harmless, can be assured. 5, the outer sheath: PVC outer sheath for high-quality material. PVC has good anti-corrosion, anti-acid, anti-aging effects, and 100% waterproof.