When purchasing wires, the following points should be noted

Special cables are equivalent to large quantities and wide coverage of ordinary wires and cables. They are a series of wire and cable products with unique structures and special properties. Generally, special cables have common characteristics such as strict usage environments, high technical content, slightly smaller usage compared to general wires and cables, and higher added value. Special cables often adopt new structures, materials, design calculation methods, and production processes.

There are many varieties, specifications, and prices of wires in the market, making it difficult for consumers to choose. A coil of wire with the same specifications may have a price difference of 20% to 30% due to different manufacturers. As for the quality and whether the length meets the standards, it is even more difficult for consumers to judge. When purchasing wires, the following points should be noted:

Is there the "Great Wall logo" and production license number of the China Electrical Products Certification Committee on the packaging label of the wire as a roll; Check if the outer plastic layer of the wire has a bright color and fine texture, and if ignited with a lighter, there should be no open flame. Non regular products using recycled plastic have a dull color, loose texture, and can ignite open flames.

2. Look at the length and compare the price. For example, BVV2 × 2.5 (BVV is a national standard code for copper sheathed wire, with 2 × 2.5 representing 2-core 2.5 mm2), the length of each roll is 100 ± 5 m, and the market price is around 280 yuan; The length of non-standard products varies from 60 to 80m, and some manufacturers make the insulation outer layer thick, making it difficult for experts to identify the problem.

3. Look at the appearance. The appearance of the wire should be smooth and flat, with no damage to the insulation and sheath layers, clear identification and printing, and no greasy feeling when touching the wire. From the cross-section of the wire, the insulation or sheath on the entire circumference of the wire should have a certain thickness and uniformity, and should not deviate from the core.

4. Check the weight of the wires. High quality wires are generally within the designated weight range. The commonly used plastic insulated single stranded copper core wire with a cross-sectional area of 1.5mm2 weighs 1.8-1.9kg per 100m.

5. Look at the brand. Famous brands naturally have superior quality. Therefore, when making a purchase, it is best to choose products from reputable brands. Because only big brands cherish their brand image and value, do not engage in false advertising, and place greater emphasis on quality and service.

The quality of the wire can also be seen from its appearance. A good wire has a smooth and even appearance, and the color is uniform. If the wire has discoloration or other phenomena, it indicates that the quality of the wire is not up to standard. Regardless of whether the wire conductor is made of aluminum or copper material, as long as it meets the standards, the wire should be smooth and free of oil stains for safer use and better conductivity.