At present, with the rapid development of industrial automation in our country, explosion-proof cables are used as the power supply equipment for communication, monitoring, detection, alarm and control systems in the production process. The explosion-proof safety power supply is mainly used in the mixture containing coal, petroleum, chemical, textile and coal Environment. What kind of cable is called "explosion-proof cable"? That is, the line is short-circuited or sparked, which is not enough to ignite the flammable gas around. Such a circuit is called intrinsically explosion-proof safety circuit and the cable used is called "explosion-proof cable". Explosion-proof cable is characterized by low capacitance, not easy to store charge, good shielding properties and antistatic properties. Explosion-proof safety power circuit must meet the requirements of explosion-proof safety circuit standards, the current explosion-proof safety products and standards have formed a more complete system. Explosion-proof cable manufacturers a lot, its uneven quality. Bi Guohua, Sales Manager of the First Branch of Tianjin Cable Plant, reminds customers to buy drawings of explosion-proof cables or the environment where the explosion-proof cables are used and the detailed description of occasions when they buy explosion-proof cables in order to avoid economic losses. Explosion-proof cable varieties include control cables, signal cables, computer cables, coaxial RF cables and other IA levels. Under normal operating conditions, the circuit can not ignite an explosive gas mixture in the presence of one fault or two faults. In the IA type circuit, the operating current is limited to 100mA below, for chemical, oil refining, shipping, and other use. IB class: In normal operating conditions, and the circuit in the event of a failure, can not point explosive gas mixture of alkenes. In the IB circuit, the operating current is limited to 150mA below, suitable for mining and explosion-proof equipment. Another type of explosion-proof cable is used in coal mine explosion-proof cables, mine safety products must hold the certificate of product safety certificate, m grade: Products coal mine power cables , coal mine signal cables, coal mine shearer cables, steel wire armored cables, Coal mine wire braided cables, etc., suitable for coal mines, vertical wells, inclined shafts, wellbores and other use.