The common specifications of wire harnesses used in automobiles have the nominal cross-sectional area of wires such as 2.5 mm - 70 mm, each of which has the allowable load current value, and different power electrical equipment wires. Apply 0.5 m rail line to the vehicle harness, such as lamp, lamp, lamp door, ceiling, etc; 0.75 specification applies to license plate light line, front and rear small lights, brake lights, etc; 1.0 The standard line is applicable to turn signal lamps and fog lamps; Applicable to 1.5 specifications of headlamp line and loudspeaker; The main power line, such as generator armature, is required to be 2.5 to 4 mm2.
It means that for ordinary cars, the key is to see the maximum current value of the load. For example, the ground wire of the battery and the positive power wire are used separately. Their wire diameter is relatively large, at least more than 10 square millimeters. These "Big Mac" wires will not be included in the main harness.
The car harness is the main body of the car circuit, and there is no car circuit in the harness. Automobile wire harness refers to the components used to bind the wire harness and form the connecting circuit after the contact terminal (connector) made of copper material is pressed and contacted with the wire and cable, and then the plastic pressing insulator or external metal shell is used outside the wire harness. The electronic harness industry chain includes wires and cables, connectors, processing equipment, harness manufacturing and downstream application industries. Wire harness is widely used in automobiles, household appliances, computers and communication equipment, various electronic instruments and meters, etc., and automobile wire harness is connected with the whole vehicle. The general shape is H-shaped.