First, the temperature of the heating cable core line configuration: core wire having a positive temperature coefficient of resistance of the metal alloy wire composed of linear rated power 18w / m. 2 Insulation: EASTFIRE heat insulation heating cable with double insulation structure, the insulating layer directly affects the quality of life of the heating cable, heating cable insulation temperature EST through trial and error, at 140 ℃ high temperatures, high temperature resistant layer deformation, not shrinking. 3 GND: 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. Metal shield 4: In the process of using the heating cable, since the current role of the heating cable will be formed around the electromagnetic field, and 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. Through testing, EASTFIRE electric floor heating value of the electric field intensity of labor is within the scope of national security, 1/1000 (state of the electric field strength is 4000 V / m, measured data EASTFIRE heating cable is 4 volts / m); magnetic induction the highest value was 13%, the lowest 6% (state of the magnetic induction intensity is 100 Witte Tesla, EASTFIRE electricity to warm up to 13 measured data Witt Tesla, Tesla minimum 6 Witt). Far below the national standard, higher than the national safety regulations, harmless, can be assured. 5 Outer sheath: PVC outer sheath for high-quality material. PVC has good anti-corrosion, anti-acid, anti-aging effects, and 100% waterproof. Second, the high-temperature heating cable technical data related to a heating cable diameter: According to the State Administration of Quality Supervision, Inspection and Quarantine and the Standardization Administration of China in 2007 published "GB/T20841-2007IEC 60800:1992 rated voltage 300/500V comfort heating and with anti-icing heating cables "provides heating cable diameter not less than 6mm, EASTFIRE heating cable has a diameter of 6.5 ± 0.3mm, higher than the national standard. 2 heating cables linear power ─ 18W / m 3 implicit connection: "EST" heating cable in the cold line hotline connection with the use of a proprietary patented welding method. Currently on the market most of the production of heating cable with cold connection method (cold, hot with mechanical crimping manner). In the long run, the heat and the cold part of the lead portion of the contact point is formed because of poor contact and a large specific resistance, high temperature at the joint part, the joint eventually burn out. Cold joints like a home furnace used as electric wire is rarely blown, and electric wire and power connectors often a problem. The "EST" implicit heating cable connector (a small-diameter wire docking method) method is patented heating wire welding with cold leads as one solution to solve the alternating hot and cold brought expansion and poor contact , to ensure that the heating cable cold leads, hot wire welding smooth transition, so that the heating cable at one go, leaving no blemishes; heating cables can be used to ensure the reliability, security, waterproof and resistant to mechanical external damage. Ensure that the service life of the heating cable. 4 heating cables logo: according to the National Quality Supervision, Inspection and Quarantine and the Standardization Administration of China in 2007 published "GB/T20841 ─ 2007/IEC 60800:1992 rated voltage 300/500V comfort heating and prevention of ice Heating cables" provides heating cable surface markers legible, easily identifiable, rub resistance, signs spacing greater than 500mm, the most important is that the "EST" cold joints in the heating cable with a way to accurately identifies Coding heating cables, giving to warm the construction and inspection brings great convenience.