PVC insulated cable products are divided into non-sheathed cables for fixed wiring, sheathed cables for fixed wiring, light non-sheathed flexible cables, general-purpose sheathed flexible cables, installation wires and shielded wires, and special-purpose sheathed flexible cables. Cables, PVC insulated flame-retardant/fire-resistant cables and other products.
1. Preferred products from regular manufacturers and merchants. Wires packed in reels should have a certificate of conformity, and the body of the wire should be printed with the name of the manufacturer or trademark, voltage, 3C logo, etc. Factory counterfeit and inferior wires are often “three-no” products, but they also have ambiguous origin and other signs, which is actually equivalent to not marking the origin.
2. The conductor materials used for wiring are mainly copper and aluminum. When purchasing, you should first select the corresponding specifications according to the load used. For example, the lighting circuit uses 1.5 square millimeter copper wire or 2.5 square millimeter aluminum wire, and air conditioners, microwave ovens, ovens, etc. use 2.5 square millimeter copper wires or 4 square millimeters. Choose the appropriate specifications of the aaac cable to avoid short circuit and fire caused by the insufficient current carrying capacity of the small-sized wires; secondly, pay attention to the quality of the conductors when purchasing, and the qualified copper core wires should use purple, shiny, and soft copper The copper core of the shoddy copper core wire is purple-black, yellowish or white, with a lot of impurities, poor mechanical strength, and poor toughness. It will break if you apply a little force, and if it is a multi-strand copper wire, it will often break. The service life is short.
3. The sheath used for wiring the wires is polyvinyl chloride insulating material. Qualified wire insulation should have a smooth appearance and clear printing on the surface. Observed from the wire end, the insulation should be uniform and not eccentric. The insulation layer of some shoddy wires seems to be very thick, but in fact, most of them are made of recycled plastics. Over time, the insulation layer will age and leak electricity.
4. Good quality wires are generally within the specified weight range. In terms of price, due to the low production cost of counterfeit and shoddy wires, vendors often sell them at low prices under the guise of low prices and good quality when selling.