how to chose the cross-sectional area of the low-voltage wire

The connecting wires used in various electrical equipments in automobiles can be appropriately selected according to the size of the load current of the electrical equipment. The principle is generally: long-running electrical equipment can select 60% of the actual carrying capacity of the wire; short-term work of electrical equipment can use the actual ampacity between 60-100% of the wire. At the same time, the voltage drop in the circuit and the heating of the conductor should also be considered in order to avoid affecting the electrical performance of the electrical equipment and exceeding the permissible temperature of the conductor. In order to ensure a certain degree of mechanical strength, Generally, the cross-sectional area of the low voltage conductor is not less than 0.5mm2. Table 16-1 shows the allowable ampacity (A) of the nominal cross-sectional area of the copper conductor.