Ningbo Qiaopu Electric Co.,LTD Power said that under the wire size selection

Data determined using the power wire ( conductor cross section ) , the heating should generally be considered , the voltage loss , economic current density and mechanical strength of the selection criteria .
In the daily production Ningbo Qiaopu Electric Co.,LTD according to the experience, low-voltage power lines because the load current is large , it is generally press fever conditions select section , and then checking the voltage loss and mechanical strength ; low- voltage lighting line because high level requirements, allowable voltage loss condition can press to select cross-section , and then checking the heating conditions and mechanical strength ; against high-voltage lines, then press to select cross-section of economic current density and heat checking their condition and allow the voltage loss ; while high voltage overhead lines , also checking its mechanical strength. If the user does not have the experience , you should consult the relevant professional unit or person .
Application installation range: flat supply for special places of lifting equipment, power rail , trolley, transport machinery, elevators , traffic , tower cranes, mobile telescopic machinery and equipment and other electrical power transmission lines and control, lighting , communications, letters road, can also be used enclosed indoor environment moving mechanical parts , such as connecting the installation. Relatively circular power , the flat power more installation space and cost savings and other advantages , and in the same number of cores , the bending radius smaller than round supply.
Ningbo Qiaopu Electric Co.,LTD also found that the power structure : multi-strand twisted or fine fine fine mountain of copper conductor bundles ; resistant to oil acid PVC insulation sheathing materials ; adjacent parallel wires arranged ; soft power structure , with there are yellow-green , to distinguish between the core wire figures for laying installation convenience.
First, as the volume of wire packing card , with or without China Electrotechnical Certification Commission's " Wall sign" and production license number ;
Look at the wire outer plastic skin is bright color, fine texture, with a lighter to ignite should be no open flame. Irregular products using recycled plastic , color dark, loose texture , can ignite flames .
Second, look at the length , than the price. BVV2 × 2.5 per roll length is 100 ± 5 meters, the market price of around $ 280. Non-formal product length 60-80 meters. Some manufacturers do thick insulating jacket , so it is difficult to see the problem experts . You can count the number of turns of the wire ,
Then multiplied by the radius of the entire volume , you can roughly calculate the length. These products prices between 100-130 yuan .
Thirdly can ask us Ningbo Qiaopu Electric Co.,LTD cut a decapitation , see copper material . 2 × 2.5 Copper 1.784 mm in diameter , you can look at the amount with a micrometer . Regular use of fine red copper wire products , bright and slightly soft outer layer . Partial non-formal black and copper products hard, is renewable recycled copper , high resistivity, conductivity is poor, will heat up without security .