Commonly used specifications of wires in automobile harness are those with nominal cross-sectional area of 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 4.0 and 6.0 square millimetres (nominal cross-sectional area of 0.5, 0.85, 1.25, 2.0, 2.5, 4.0, 6.0 square millimetres commonly used in Japanese cars). They each have allowable load current values, which can be used for different power electrical equipment. Wires.
Taking the harness of a vehicle as an example, the 0.5 gauge line is suitable for instrument lamp, indicator lamp, door lamp, ceiling lamp, etc. The 0.75 gauge line is suitable for license plate lamp, front and rear small lamp, brake lamp, etc. The 1.0 gauge line is suitable for steering lamp, fog lamp, etc. The 1.5 gauge line is suitable for front headlamp, horn, etc. The main power line such as generator armature wire, overhead wire, etc. Find 2.5 to 4 square millimeter wires.
This only refers to the general car, the key depends on the maximum current of the load, such as battery tie-in wire, positive power supply wire is a special car wire used alone, their diameter is relatively large, at least more than a dozen square millimeters, these "Big Mac" wires will not be woven into the main harness.