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What's the difference between wires and cables?
Wires and cables are broadly defined as wire products used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion. Wires and cables in a broad sense are also referred to as cables for short, and cables in a narrow sense refer to insulated cables. It can be defined as an aggregate consisting of one or more conductor cores and their respective possible cladding, total protective layer and outer protective layer. Cables may also have additional uninsulated conductors. In order to facilitate the selection and improve the applicability of products, wire and cable products are divided into the following five categories according to their uses.
(1)Bare wire and conductor products
Refers to products with only conductors but no insulation layer, including copper, aluminum and other metal conductors and composite metal round single wires, overhead transmission lines with various structures, flexible wires, profiles and so on.
(2)winding wire
It is also called electromagnetic wire, because it cuts the magnetic field lines in the form of windings to induce current, or leads the current to generate the magnetic field, including enameled wire, wound wire and inorganic insulated wire with various characteristics.
(3)Communication cable and communication optical cable
Cable products used for various signal transmission and long-distance communication transmission mainly include communication cables, radio frequency cables, communication optical cables and electronic cables.
Communication cables are cables for transmitting telephone, telegraph, television, broadcasting, fax, data and other telecommunication information, including local communication cables, symmetrical digital communication cables and coaxial (trunk) communication cables, and the transmission frequency is from 0 to several gigahertz.
Compared with communication cable, radio frequency cable is a cable suitable for transmitting radio frequency (radio) signals in radio communication, broadcasting and related electronic equipment, also known as "radio cable". Its operating frequency is several megahertz to several tens of gigahertz, which is the radio frequency range of high frequency, very high frequency (VHF) and ultra-high frequency (UHF). Most RF cables adopt coaxial structure, sometimes symmetrical and strip structure, and they also include waveguides, dielectric waveguides and surface wave transmission lines.
Communication optical cable uses optical fiber (optical fiber) as light wave transmission medium to transmit information, so it is also called fiber optical cable. Because of its small transmission attenuation, wide frequency band, light weight, small outer diameter and no interference from electromagnetic field, communication optical cable has gradually replaced some communication cables. According to the optical fiber transmission mode, there are single mode and multimode. According to the structure of optical cable, there are many forms, such as stranded type, skeleton type, central tube type, stranded unit type and skeleton unit type. According to its different use conditions and environments, optical cables can be divided into direct buried optical cables, pipeline optical cables, aerial cable, underwater or submarine optical cables and other forms.
Electronic cables are classified as communication cables in this manual. This kind of cable products are mainly used to connect the inside of electronic and electrical equipment, between the inside and the outside equipment, usually with short length and small size. It is mainly used for all kinds of household appliances, electronic communication equipment, audio and video equipment, information technology equipment and telecom terminal equipment with 600V and below. Because of the variety and different requirements of these devices, this kind of cables are required to have different heat resistance, insulation, special properties, mechanical properties and appearance structure.
(4)power cable
Cable products used to transmit and distribute high-power electric energy in trunk (and branch) lines of power system include power cables with various voltage levels and insulation forms of 1~500kV, including superconducting cables and submarine cables.
(5)Wire and cable for electrical equipment
Wires and cables for power connection lines that directly transmit electric energy from the distribution point of power system to various electrical equipment and appliances, electrical installation lines and wires and cables for control signals used in various industrial and agricultural equipment, military equipment, aerospace equipment, etc. all belong to this category of products. This kind of products have a wide range of applications, and most of them should be combined with the characteristics of the equipment used and the environmental conditions to determine the structure and performance of the products. Therefore, in addition to a large number of general products, there are many special and special products, collectively referred to as "special cables."
According to this classification, the cables from power input to output of charging piles belong to "wires and cables for electrical equipment". The wiring of various electronic components inside the charging pile belongs to "electronic cable".