Does the wire and cable country have a standard weight

Dear, hello, the wires of the national standard are generally within the specified weight range. For example, the commonly used plastic insulated single-strand copper core wire with a cross-sectional area of 1 5 mm2 is cavity, and the weight per 100 m is kg; 2 5 mm2 plastic insulated single-strand copper core wire weighing 3 kg per 100 m; 4 0 mm2 plastic insulated single-strand copper core wire, weighing kg per 100 m, etc. Poor quality wires are not of sufficient weight, either not long enough, or there are too many impurities in the copper core of the wire.

Measurement standards: 1. Appearance standards, there must be certification marks, manufacturers, wire diameters, etc. on the wire, yellow-green insulation layer for ground wire 2, mechanical strength 3, insulation of the sheath (generally greater than 100m) and voltage strength (below 500V and 1500V) 4, line resistance (a certain wire diameter, conductivity, length is not greater than a certain electric age of resistance) 5, under the high temperature impact of 150 degrees, the wire shall not crack at the low temperature of -30 degrees.

Literally, the cable dishes produced in strict accordance with the national standard are considered national standard cables, which can only be higher than the standard, and are not allowed to be lower than the standard.

The so-called national standards for wires and cables actually refer to some requirements made by relevant national departments for the construction of wires and cables, and these requirements are the result of countless experiences and amendments. So, what are the country's requirements for cable engineering?

In fact, the country's requirements for cables or wires are divided in great detail, including wire selection, installation, wiring, service life and other requirements. Moreover, the standards are different in different construction environments and different regions. In other words, the national standard for cables is not only specific, but also has a very strong regional lead.

In addition, in order to facilitate the cable industry and users in various industries to query the relevant cable standards as soon as possible, the National Wire and Cable Standardization Technical Committee has also jointly published the book "Wire and Cable Standards Compilation" in conjunction with relevant institutions. This book can basically meet everyone's query and application needs for cable standards.

The content of the compilation of national standards for wires and cables is mainly divided according to the specialty, including 9 parts, namely general test method volume, cable and optical cable combustion test method volume, general foundation and component volume, bare wire coil, winding wire coil, marine cable coil, installed early blind spare wire and cable coil, power cable and accessory volume, communication cable, optical cable and accessory volume.

The model of China's wire and cable is composed of 7 groups of letters and numbers.

The first group consists of one to two letter groups, indicating the type and purpose of the wire. Such as: A-installation wire, B-cloth wire, C-marine cable, K-control cable, N-agricultural cable, R-flexible wire, U-mining cable, Y-mobile cable, JK-insulated overhead cable, M-coal mine, ZR-flame retardant, NH-fire-resistant, ZA-A flame retardant, ZB-B flame retardant, ZC-C flame retardant, WD-low smoke halogen-free type.

The second group is a letter that indicates the material of the conductor material. Such as: T-copper core wire (omitted most of the time), L-aluminum core wire.

The third group is a letter that represents the insulation layer, such as: V-PVC plastic, YJ-XLPE insulation, X-eraser, Y-polyethylene, F-PTFE.

The fourth group is a letter that represents the sheath, such as: V-PVC sheath, Y-polyethylene material, N-nylon sheath, P-copper wire braided shield, P2-copper tape shield, L-cotton yarn braided wax gram, Q-lead package.

The fifth group is a letter that indicates characteristics, such as: B-Flat, R-Soft, C-Heavy, Q-Light, G-High-Voltage, H-For Welders, S-Twisted Pair.

Group 6 is a number that indicates the armor layer, (under the small foot mark). 2-Double steel strip, 3-Fine round steel wire -Coarse round steel wire.

The seventh group is one, which represents the foreign He bucket sheath, (under the small foot mark), such as: 0- means no sheath, 1-fiber layer, 2-PVC cover.

Wire weight: conductor weight + insulation weight.

Conductor weight = conductor specific gravity cross-sectional area (where the specific gravity of copper conductor is, aluminum is, and the cross-sectional area is generally taken as the nominal cross-section, such as..)Wait.

Weight of insulation layer = outer diameter before extrusion, insulation thickness, insulation thickness, specific gravity of insulating material (where the ratio of PVC insulating material is positive, which is the weight of PE insulating material).

The above formula calculates the weight in kilograms.