Comparison table of all general-purpose wire gauges and sizes

Wire and cable knowledge: wire and cable to transmit electrical (magnetic) energy, information and electromagnetic energy conversion wire products. Broad wire and cable is also referred to as cable. The narrow sense of the cable refers to the insulated cable. It can be defined as a collection of the following parts: one or more insulated cores, as well as their respective coverings may have, the total protective layer and the outer jacket. Cables may also have additional uninsulated conductors.

Two wire and cable classification: 1, bare wire and bare conductor products the main features of this category of products is: pure conductor metal, no insulation and sheath layer, such as steel-core aluminum stranded wire, copper and aluminum busbar, electric locomotive wire and cable, etc.; the processing technology is mainly pressure processing, such as smelting, calendering, pulling, stranded/tightening stranded, etc.; the product is mainly used in the outskirts of the city, the countryside, the user's main line, switchgear and so on. 2, the power cable this The main features of these products are: extruded outside the conductor (winding) package insulation, such as overhead insulated cables, or a few core stranded (corresponding to the phase line of the power system, the zero line and ground), such as more than two-core overhead insulated cables, or increase the sheath layer, such as plastic / rubber-coated wires and cables. The main process technologies are pulling, stranding, insulation extrusion (winding and wrapping), cable formation, armoring, sheath extrusion, etc., and there are some differences in the combination of different processes for various products. Products are mainly used in hair, distribution, transmission, transformation, power supply lines in the transmission of electricity, through the current (tens of amps to thousands of amps), high voltage (220V to 35kV and above).3, electrical equipment wire and cable the main features of this category of products: a wide range of varieties and specifications, a wide range of applications, the use of the voltage in the 1kV and the following are more in the face of the special occasions continue to derive new products such as fire-resistant cable Fire-retardant cables, low-smoke halogen-free / low-smoke low-halogen cables, termite-resistant, anti-rat cables, oil / cold / temperature / abrasion-resistant cables, medical / agricultural / mining cables, thin-walled wires, etc. 4, communication cables and optical fibers with the rapid development of the communications industry, from the past to the development of simple telephone and telegraph cable to a few thousand pairs of words, coaxial cable, optical fiber cables, data cables, or even a combination of communication cables, etc. The product structure size is usually smaller. The structure of this type of product size is usually small and uniform, manufacturing precision requirements. 5, electromagnetic wire (winding line) is mainly used for a variety of motors, instruments and meters, etc. 6. Derivative/new products of wire and cable wire and cable derivatives/new products mainly due to the application of occasions, application requirements are different and the convenience of the equipment and equipment to reduce the cost of the requirements, and the use of new materials, special materials, or to change the structure of the product, or to improve the process requirements, or will be different varieties of products. Process requirements, or the combination of different varieties of products. The use of different materials such as flame retardant cables, low-smoke halogen-free/low-smoke low-halogen cables, termite-proof, anti-rodent cable, oil/cold/temperature-resistant cables, etc.; to change the structure of the product, such as: fire-resistant cables, etc.; to improve the technological requirements of the cable, such as: medical cables, etc.; a combination of products, such as: OPGW, etc.; to facilitate the installation and reduce the cost of equipment, such as: prefabricated branch cables, etc.. Three wire and cable specifications. Name and scope of application: wire and cable specification model table yjv copper core polyethylene insulation polyethylene sheathed power cables are laid in the room, tunnels and pipelines, the cable can not withstand the pressure and mechanical external force. Wire Cable Specification Model List vlv Aluminum Core yjv22 Copper Core Polyethylene Insulated Steel Ribbon Armored Polyethylene Sheathed Power Cables are laid indoors, in tunnels and direct buried soil, the cables can withstand pressure and other external forces. vlv22vv32 PVC Insulated Thin Steel Wire Armored Polyvinyl Chloride Sheathed Power Cables are laid indoors, in mines, the cables can withstand considerable tensile forces. vlv32vv42 PVC insulated thick steel wire armored PVC sheathed power cables are laid indoors, in mines, the cable can withstand considerable axial tension. vlv42zr-vvPVC insulated PVC sheathed flame retardant power cables are laid indoors, in tunnels and pipelines, the cables can not withstand the pressure and the role of the mechanical external forces. zr-vlvzr-vv22PVC insulated steel tape armored PVC sheathed Flame retardant power cables are laid indoors, in tunnels and in direct buried soil, the cables can withstand pressure and other external forces. zr-vlv22zr-vv32 PVC insulated fine steel wire armored PVC sheathed flame retardant power cables are laid indoors, in mines, the cables can withstand considerable tensile force. zr-vlv32zr-vv42 PVC insulated coarse steel wire armored PVC sheathed flame retardant Power cables are laid indoors and in mines, and the cables can withstand considerable axial tension. zr-vlv42 wire and cable specification table The model number of the cable consists of eight parts: i. Use code-not marked as power cable, k as control cable, p as signal cable; ii. Insulation code-z oil-impregnated paper, x rubber, v polychlorinated ethylene, yj crosslinked polyethylene; iii. Conductor material code-not marked as copper, l as aluminum; iv. Fourth, the inner sheath code - q lead clad, l aluminum clad, h rubber jacket, v polychlorinated ethylene sheath v. Derived code - d non-drip, p dry insulation; six, the outer sheath code vii, special product code - th wet heat tape, ta dry heat tape; viii, the rated voltage - the unit kv wire and cable specifications model table about the cable type of the problem sywv (y), sykv cable TV, broadband network special cable structure: ( Coaxial cable) single oxygen-free round copper wire + physical foaming polyethylene (insulation) + (tin wire + aluminum) + polyvinyl chloride (polyethylene) 2, signal control cable (rvv sheathed wire, rvvp shielded wire) is suitable for building intercom, burglar alarm, fire protection, automatic meter reading and other projects 3, rvvp copper-core polyvinyl chloride insulated shielded polyvinyl chloride sheathed flexible cable voltage 300v/300v 2-24 core Uses: instruments, meters, intercom, monitoring, control installation 4, kvvp: PVC sheathed braided shielded cable Uses: electrical appliances, instruments, power distribution devices, signal transmission, control, measurement 5, rvv (227iec52/53) PVC insulated flexible cable Uses: household electrical appliances, small power tools, instrumentation and power lighting 6, rvv PVC insulated cable 7, rvs, rvb for household appliances, small electric tools, instruments, meters and power lighting connection cable 8, bv, bvr polyvinyl chloride insulated cable use: for electrical instrumentation equipment and power lighting fixed wiring with 9, kvv polyvinyl chloride insulated control cables use: electrical appliances, instrumentation, power distribution devices signal transmission, control, measurement rvv and kvv rvvp and kvvp wire and cable Specification table difference: rvv and rvvp inside the line used for multi-stranded fine copper wire composed of soft wire, that is, rv line composition. kvv and kvvp inside the line used for a single strand of thick copper wire composed of hard line, that is, bv line composition. avvr and rvvp difference: the same thing, just the internal cross-section of less than 0.75 square millimeters of the name of the name for the avvr is equal to the name of 0.75 square millimeters. rvvp. The difference between syv and sywv: syv is a video transmission line with polyethylene insulation. sywv is a radio frequency transmission line with physical foam insulation. it is used for cable television. rvs and rvvp are the same. Used for cable TV. rvs and rvv 2-core difference: rvs is a two-core rv wire twisted together, no outer sheath, used for broadcasting connections. rvv 2-core line straight into the cable, there is an outer sheath, used for power supply, control signals and other aspects of wire and cable specification model table r-connections with flexible cables (wires), soft structure. v-insulated PVC. v-insulated PVC. rvs and sywv are used to connect the cable. rvs and sywv are used to connect the cable. v-insulated polyvinyl chloride v-polyvinyl chloride sheath b-flat type (flat). s-twisted type. a-tinned or silver-plated. f-high-temperature resistant p-braided shielding p2-copper tape shielding p22-steel tape armored y-prefabricated, generally omitted, or polyolefin sheaths fd-product category designation for branching cable. To be promulgated by the Ministry of Construction standard with fz, the substance is the same yj-crosslinked polyethylene insulation v-polyvinyl chloride insulation or sheath zr-flame retardant nh-fire-resistant wdz-halogen-free low-smoke fire-retardant wdn Halogen-free low-smoke fire-resistant

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