Fire-retardant and flame-retardant cables can maintain the integrity of the circuit in the event of a fire, ensuring the safe and normal operation of critical emergency systems. A large number of fire alarm systems, smoke detection systems, emergency lighting power systems, and public address systems are used in large shopping malls, hospitals, office spaces, stations, airports, civil residences, and other buildings abroad. 1. Compared to traditional fire-resistant and flame-retardant cables, which have less acid gas smoke, their fire-resistant and flame-retardant performance is greatly improved. Especially during combustion, accompanied by water spraying and mechanical shock, the cable can still maintain the integrity of the circuit (i.e., the circuit can work normally). 2. Compared with inorganic mineral insulated cables, it also has the following significant advantages: a. The new type of fire-resistant and flame-retardant cable adopts a twisted pair or twisted structure, which can significantly improve the clarity and speed of data transmission. b. Due to the use of a shielding structure, the anti-interference performance is greatly improved, especially in the frequency range of 1-100MHz, which can reduce attenuation by 30-35dB. c. Due to the significant reduction in core to core and core to core shielding capacitance of newly developed cables, larger lengths of cables can be used in fire alarm circuits, meaning their installation length is not limited. Here, the low capacitance of the cable is a very valuable performance parameter when installing the line
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