How to identify non-standard wire and cable

1. The relevant national wire and cable products must pass the national compulsory safety production certification. All products must be certified by the nationally recognized wire and cable "CCC" and clearly marked on their certificate or product skin.

2, the manufacturer guarantees that the wire and cable products produced by it meet the requirements of national standards. In the national standards, the outer skin of high-quality national standard wire and cable products is smooth and round, the color is uniform, and the sheath, insulation and conductor are not easy to be peeled off. The inferior product has a rough and dull appearance, irregular shape, low strength of the sheath and insulation, and is easily broken.

3. The conductor of national standard products has bright color, regular shape, round shape, no impurity, no white spots, high flexibility, high strength, and the conductor resistance is in full compliance with national requirements. It has good electrical conductivity and high safety. . The conductors of non-standard wire and cable are dim, the shape is irregular, the strength is low, and it is easy to break. The resistance value can't meet the national requirements. It is easy to cause heat when it is energized for a long time, which may cause a fire accident.

4. The difference in length of wire and cable is the most direct difference between national standard products and non-standard products. The standard length of the national standard product is 100±0.5m, that is, 100m is the standard, and the maximum allowable error per 100m national standard product is about 0.5m. The length of the non-standard product is seriously insufficient and uneven. Some even have a logo of 100 meters, and the actual number of meters is even 80 meters.

5, the national standard products, will mark the manufacturer's trademark, factory name, wire and cable specifications, rated voltage, and length, production date, production number, implementation standards, etc. in the prominent position of the product certification.