One is the conductor structure.The conductor of cable is usually made of high purity copper or aluminum of certain toughness and strength with good electrical conductivity. Conductor sections are commonly used in circles and sectors. A conductor with a smaller section (less than 16 square meters) is made of a single copper wire, while a conductor with a larger section (16 square meters or more) is made of several copper wires twisted in fractional layers. When twisted, the twisted direction of the two adjacent layers is opposite.Cable structure
The second is the insulation layer of the cable.The insulation layer of cable is used to make the multi-core conductor and conductor and sheath mutually isolated, and to ensure a certain electrical compressive strength, it should have a certain heat resistance and stable insulation quality.
The thickness of the insulating layer is related to the working voltage. Generally speaking, the higher the voltage level is, the thicker the insulation layer will be, but not in direct proportion.Cable structure
Third, cable sheath.So that the cable insulation is not damaged, and to meet the requirements of various use conditions and environment, divided into inner sheath and outer sheath.Inner sheath is a protective covering covering the cable insulation to prevent the insulation from being affected by moisture, mechanical damage, light and chemical corrosive media, etc., and can also flow through short-circuit current. Common inner protective layer has non-metallic polyethylene sheath, polyvinyl chloride sheath, metal corrugated aluminum sheath and so on.Outer sheath is the protective covering layer outside the inner sheath of the cable, which mainly plays the role of mechanical strengthening and anti-corrosion. The outer sheath is usually composed of metal tape armor or wire armor plus polyvinyl chloride or polyethylene sheath.Cable structure
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