What is Electrical Cable? Who are the domestic and international manufacturers of electrical cables?

A. What is an electrical cable? An electrical cable is a device for transmitting electricity and signals made by combining conductors and insulating materials. The role of electrical cable is to transmit current or signal in the circuit, and play different roles in different occasions. It is widely used in electric power, telecommunication, construction, transportation, industry and other fields, and is one of the indispensable infrastructures of modern society. The composition of the electrical cable electrical cable is mainly composed of conductors, insulation materials and sheath. 1, conductor conductor is the core part of the electrical cable, is used to transmit current or signal body. Commonly used conductors are copper, aluminum, steel core aluminum, etc.. Copper conductor has good electrical conductivity, corrosion resistance, plasticity and other advantages, so it is widely used. Aluminum conductor has the advantages of light weight, low price, etc., and is suitable for lower voltage occasions. Steel core aluminum conductor is composed of aluminum and steel core composite conductor, has the advantages of high strength, light weight, etc., suitable for transmission lines. 2, insulating materials insulating material is a layer of insulation outside the conductor, mainly used to prevent the leakage of electric current, reduce the loss of power and other functions. Commonly used insulating materials are polyvinyl chloride, cross-linked polyethylene, cross-linked polyvinyl chloride and so on. Polyvinyl chloride has the advantages of acid and alkali resistance, waterproof, pressure resistance, etc., and is a widely used insulating material. Cross-linked polyethylene and cross-linked polyvinyl chloride is a new type of insulation material developed in recent years, with good insulating properties, heat resistance, aging resistance, etc., for high-voltage cables. 3, sheath sheath is used to protect the cable insulation from mechanical damage, chemical corrosion, electromagnetic interference and other effects of a layer of material. Commonly used sheath materials are polyvinyl chloride, polyethylene, low-smoke halogen-free flame retardant materials. Polyvinyl chloride sheath has the advantages of pressure resistance, abrasion resistance, waterproof and so on, is a widely used sheath material. Polyethylene sheath has the advantages of abrasion resistance, acid and alkali resistance, waterproof and so on. There are many different types of electrical cables, which can be categorized according to usage, electrical characteristics, material and appearance. Here are some common types of electrical cables: 1. Power cables: Power cables are a type of electrical cable used to carry high currents and voltages. They usually consist of multiple insulated wires, and special insulating materials are often used because they need to withstand high voltages. Communication cables: Communication cables are electrical cables used to transmit signals. They usually consist of multiple insulated wires and a shield to reduce interference and improve signal quality.2. Control cables: Control cables are a type of electrical cable used to control and transmit signals. They usually consist of multiple insulated wires and signal wires that are used to control various functions of a machine or device.3. Coaxial Cable: Coaxial cables are a type of electrical cable used to transmit high frequency signals. They usually consist of a center wire and a shield to prevent signal interference.4. Fiber optic cable: Fiber optic cables are a type of electrical cable used to transmit optical signals. They usually consist of one or more optical fibers and are used for long distance communication and network connections.

Second, what are the domestic and foreign manufacturers of electrical cables?

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