Steel Sheet Roll Forming Machine,Cascade Glazed Tile Forming Machine,Roofing Rolling Machine Forward Roll Forming Machinery Manufacturing Co., Ltd. , http://www.czrollformingmachine.com
1. The "CCC" certification wire and cable products are national compulsory safety certification products. All manufacturers must obtain the "CCC" certification from the China Electrotechnical Products Certification Committee, and have the "CCC" certification mark on the certificate or product.
2. Look at the inspection report As the products affecting personal and property safety, wire and cable products have been listed as the focus of government supervision and inspection. Regular manufacturers are subject to inspections by the supervisory department. Therefore, the seller should be able to provide the inspection report of the quality inspection department, otherwise, the quality of the wire and cable products is lack of evidence.
3, look at packaging Any product that meets national standards in the production of a regular enterprise, the production of wire and cable pay attention to product packaging. Pay attention to the exquisite packaging, the printing should be clear, the model specifications, the name of the factory, and the complete factory site.
4, look the appearance of the product smooth and round, uniform color. The wire and cable companies whose products meet the requirements of the national standards must strictly control the purchase of raw materials, production equipment, and production processes in order to improve product quality and ensure that the products meet the requirements of the national standards. Therefore, the appearance of wire and cable products produced meets the requirements of the standard, smooth and round, uniform color. The appearance of fake and shoddy products is rough and dull. For the rubber-insulated flexible cable, the appearance is required to be round and the sheath, insulation, and conductor are not easily peeled off. The appearance of counterfeit and shoddy products is rough, the ellipticity is large, and the insulation strength of the sheath is low, and it can be torn by hand.
5, to see the conductor conductor shiny, DC resistance, conductor structure and other dimensions in line with national standards. The wire and cable products that meet the requirements of national standards, whether aluminum conductors or copper conductors, are all brighter and free from oil pollution. Therefore, the DC resistance of conductors is in full compliance with national standards, with good electrical conductivity and high safety.
6, the length of the length of wire and cable is the main intuitive method to meet the requirements of national standards and fake and shoddy products. Do not try to buy cheap, cheap, buy the actual number of meters below its nominal number of wire and cable. The length must match the nominal number of meters. The national regulations allow an error of Â±0.5 meters per 100 meters.
Only by doing the above points can you really buy genuine cables.
Steel Sheet Roll Forming Machine,Cascade Glazed Tile Forming Machine,Roofing Rolling Machine
Forward Roll Forming Machinery Manufacturing Co., Ltd. , http://www.czrollformingmachine.com