Automotive wiring harness commonly used wire specifications have a nominal cross-sectional area 0.5,0.75,1.0,1.5,2.0,2.5,4.0,6.0 square mm of wire (Japanese cars commonly used nominal cross-sectional area of 0.5,0.85,1.25,2.0 , 2.5,4.0,6.0 square millimeters), each of them have a load current value, with different power lines used in electrical equipment.
Take the vehicle wiring harness as an example, the 0.5 specification line is suitable for instrument lights, indicator lights, door lights, dome lights, etc .; 0.75 specification line for license plate lights, front and rear small lights, brake lights, etc .; 1.0 specification line for turning lights, fog Lights
1.5 specification line for headlamps, speakers, etc .; main power lines such as generator armature wire, ground wire, etc. require 2.5 to 4 square mm wire.
This refers only to the average car, the key depends on the maximum load current value, such as the battery ground wire, positive power cord is a dedicated car wire alone, their larger diameter, at least a dozen square millimeters Above, these "giant" wires will not be incorporated into the main beam.