What is wire and cable? Who are the domestic and international manufacturers of wire and cable?

First, what is wire and cable? Wire and cable is an electrically conductive material used for transmitting electricity or signals, usually consisting of a number of tiny metal conductors and insulation. Wires and cables are used in a wide variety of applications, such as buildings, transportation, communications, energy and electronic equipment. Wires and cables can be divided into two main categories: power cables and communication cables. Power cables are mainly used to transmit high voltage electricity, while communication cables are used to transmit signals such as sound, data and video. In addition, there are some special-purpose wires and cables, such as fire-resistant cables, mining cables, medical cables and so on. The structure of wire and cable usually includes conductor, insulation, sheath and filler. The conductor is the main transmission medium in wire and cable, usually made of copper or aluminum. The insulation serves to isolate the conductor from the environment to prevent current leakage and loss. Insulation can be rubber, plastic, rubber-plastic mixtures, etc. Sheathing serves to protect the wire and cable from damage and the external environment, such as water, oil, heat, UV rays, etc. Fillers can be filled inside the wire and cable to make it stronger and more durable. The choice of wire and cable depends on the specific use and environment in which it is required. For example, when installing wire inside a building, fire safety and the structure of the building need to be considered. During the design and installation of submarine cables, seawater corrosion and the challenges of the marine environment need to be considered. Wires and cables used in industrial facilities need to take into account the effects of high temperatures and chemicals. The manufacturing process for wire and cable requires stringent controls and testing. These controls include parameters such as conductor diameter, insulation thickness, jacket material and thickness. Testing includes electrical, mechanical, and chemical testing to ensure the quality and reliability of wire and cable. The basic construction of wire and cable includes the conductor, insulation, sheath and other auxiliary materials 1.ConductorThe conductor is the core part of the wire and cable, which is the part used to transmit power and signals. The conductor is usually made of copper, aluminum and other metals, because these metals have good electrical and thermal conductivity, able to transmit current and signals in the circuit. The larger the cross-sectional area of the conductor, the greater its ability to transmit. Conductor can also be divided into single-stranded conductor and multi-stranded conductor two kinds of single-stranded conductor consists of a wire, and multi-stranded conductor by a multi-stranded wire twisted together. 2. Insulation insulation is a layer of material to protect the conductor, its purpose is to isolate the conductor, to prevent the leakage of electric current and electrocution accident occurs. Insulation layer is usually made of polyethylene, PVC, rubber and other materials, different materials have different insulation properties and high temperature performance. The thickness and quality of the insulation layer directly affects the safety performance and service life of the wire and cable.3. Outer SheathOuter Sheath is a layer of material to protect the insulation layer and conductor, and its main role is to waterproof, moisture-proof, corrosion-resistant, UV protection, fire prevention and so on. Wire and cable is an important part of modern society, they have a wide range of applications, a wide variety. With the continuous progress of science and technology, the manufacture and application of wire and cable will continue to innovate and develop.

Second, what are the domestic and foreign manufacturers of wire and cable?

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