Cloth choice atltech P wire conductor diameter wire conductor diameter choosing consumers in the market than the same products, often found this problem, different manufacturers do not match the conductor diameter wire products why, for example, in mm cloth with conductor wire, for example, some manufacturer for conductor diameter.
Mm, some manufacturer conductor diameter.
Mm or even more, thus creating an illusion, the conductor diameter, the greater the wiring, the better, actually otherwise, aiming at this situation, the following talk about this problem in three aspects: the old wiring national standard GB/T version of the strict rules on the conductor diameter, dc resistance performance index, specify the mm wire conductor with overseas economic cooperation.
In years, new wiring national standard GB/T version, stipulated the conductor performance indicators must comply with GB/T (
Cable conductor national standards)
Demands in GB/T standard, mm wire cloth with conductors shall not exceed the maximum outer diameter.
The new wire cloth version of the national standard GB/T, for the conductor diameter demands with GB/T are the same, namely mm wire cloth with conductors shall not exceed the maximum outer diameter.
Currently effective wiring of GB/T is the latest national standards, has replaced the two version of the standard GB/T, GB/T)
Strict rules in process of GB/T standard (conductor diameter
To the GB/T and GB/T version only require maximum conductor diameter (
, which is mainly due to: in the 1980 s, as raw material for the copper smelting production technology level is not high, the copper rod in more impurities, cause the conductor resistance is big, therefore, in order to ensure that the dc resistance of wire cloth, the national standard strictly required wiring conductor diameter, and with the continuous development of the level of copper smelting and the processing technology, the improvement of conductor of copper impurity content is more and more small, the current industry, GeChang guarantee conductor dc resistance meets the requirements, the production of the conductor diameter also have the corresponding decrease, copper consumption has reduced accordingly, which is only specifies the maximum outer diameter of the conductor in the state standards, and not make clear a regulation conductor concrete numerical value.
, according to the conductor dc resistance formula: R = rho x L/SR for conductor dc resistance;
Rho is when the environment temperature for ° conductor for resistivity for conductor per unit length L S conductor cross-sectional area according to the formula, in order to keep the cloth wire carrying capacity meet the requirements, the dc resistance of the conductor must conform to the requirements of the standard, and dc resistance according to the formula, R is affected by rho and S, S relationship with the conductor diameter, rho is related to the purity of copper, on the dc resistance of conductor must, when the conductor diameter is larger, then the rho, the purity of copper drop, if a conductor of a smaller diameter is rho decreases, and the purity of copper.
According to the above three aspects of analysis, consumer is in when choosing wiring products, cloth wire conductor diameter is not as the only standard to judge the size of the product when no qualified, namely in the wire specification is selected, the greater the conductor diameter instead is bad, so should be based on dc resistance and mechanical properties of conductor to judge the quality of products.
The Caledonian gloria Tony cable co. , LTD. , Shanghai office contact person: ms zou email penny @ caledoniancables.
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