Principle of calculation and selection of wire cross-sectional area

Motorcycle wire harness wholesalers introduces the choice of wire cross-sectional area is mainly based on the voltage drop of the line, the change in ambient temperature and the mechanical strength of the wire. The voltage drop of the line = the voltage drop caused by the wire resistance + the voltage drop of the switch contact + the voltage drop of the terminal + the contact voltage drop of the terminal + the internal resistance drop of the power supply.

Wire color selection principle

The choice of wire color is based on user requirements and error-proof design. Generally, the grounding wire is black. See QC/T 414, "Colors of Low Voltage Wires for Automobiles", and consider error-proof design, such as the same connector in the wire harness. Do not use the same color wire of the same specification.

Connector selection principle

1. Ensure that the connecting parts are in good contact, the contact resistance is the lowest, and the reliability is improved. The connector of the double spring type pressing structure is preferred.

2. According to the cross-sectional area of the wire and the size of the passing current, the connector is reasonably selected. The currents that can be carried by plugs of different specifications are generally as follows: 1 series, about 10A; 2.2 or 3 series, about 20A; 4.8 series, about 30A; 6.3 series, about 45A; 7.8 or 9.5 series, about 60A. If you want to learn more about transmission wire harness made in China,you can contact us.