PVC Cable Wire is divided into non-sheathed cable for fixed wiring, sheathed cable for fixed wiring, light non-sheathed flexible cable, general purpose sheathed flexible cable, installation wire and shielded wire, special purpose sheathed flexible cable, polychlorinated Ethylene insulation flame retardant / fire resistant cable and other products.
1. Conductor DC resistance. It directly reflects the current carrying capacity of the wire, which is the load that is usually said to be able to carry. This indicator is related to the conductor material and the conductor cross-sectional area (wire specification), which is the wire diameter.
2. Finished pressure test of finished products. Mainly assess whether the external insulation of the wire has leakage. This indicator is related to the insulating materials and manufacturing processes.
3. Insulation (sheath) thickness and mechanical properties and other items. Mainly assess the service life of the wire and the use environment. If the insulation thickness is too thin or eccentric, it is easy to break at a thin position during installation or use, and leakage is formed. Wires that use inferior insulating materials have a short life.
The conductor materials used in the cloth wires are mainly copper and aluminum. When purchasing, you should first select the appropriate specifications according to the load used, such as 1.5 square millimeters of copper wire or 2.5 square millimeters of aluminum wire for lighting circuits, 2.5 square millimeters of copper wire or 4 square millimeters for air conditioners, microwave ovens, ovens, etc.
Aluminum wire, choose the right size of the wire to avoid short-circuit fire caused by insufficient flow of small-sized wire; secondly, pay attention to the quality of the conductor when purchasing, qualified copper wire should use purple, shiny, soft copper Material, and the copper core of the inferior copper core is purple-black, yellowish or white, with many impurities, poor mechanical strength, poor toughness, and will break when a little force is applied, and if the stranded copper wire is often broken, Short service life.
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