Wires must have CCC certification mark, wire and cable products are national compulsory safety certification products, and all production enterprises must obtain CCC certification and CCC certification mark, and have CCC certification mark on certificates or products. Wire is related to the safety of electricity use, and the quality of wire will affect the safety of our lives and property, so we must choose wire products with CCC certification mark.
Wire appearance
The appearance of a good wire product should be smooth, round and uniform in color, so everyone should take apart the wire when purchasing to see if the appearance color is uniform. If there is discoloration, the quality of the wire will not pass.
Work certificate
The wire product certificate will be clearly printed with CCC certification mark, trademark, model specification, rated voltage, length, inspection, manufacturing date, implementation standard, factory name, address, telephone number and other marks, which are consistent with the product. These will be products produced by regular manufacturers, so you should read them clearly when you buy them.
Wire conductor
The conductor of the wire should be shiny, and the DC resistance and conductor structure size meet the requirements of national standards. Wire and cable products that meet the requirements of national standards, whether aluminum conductors or copper conductors, are bright and oil-free, so the DC resistance of conductors completely meets the national standards, with good conductivity and high safety. T/T purchase method
Wire specification
Wire specifications are very important. Generally, household power cords should adopt BVV2×2.5 and BVV2× 1.5 models. BVV is the national code, which is sheath line BVV2×2.5 and BVV2× 1.5, representing 2 cores 2.5 mm2 and 2 cores 1.5 mm2 respectively. Generally, BVV2×2.5 is used as the main line and trunk line, and BVV2× 1.5 is used as the single branch line and switch line. BVV2×4 is used for one-way air conditioning special line, and special grounding wire is provided.