4 pin 7282-5595-10 Auto Motor Plug Male Housing Plugs Automotive Waterproof Connectors 6.3 Series

Current flow direction
The current is the directional movement of free electrons . The reason for forming a current is the voltage. The current can only flow in a closed circuit.
1.2.1 Basic circuit composition
Automotive circuits are generally composed of power supply, circuit insurance device, control device, electric equipment, and connecting wires.
(1) Power supply
① Battery: Power supply to the relevant power equipment when the engine is not started .
② Generator: After the engine is started, the generator is powered by a small load. The battery and the generator are combined by the battery and the generator under large load .

car battery

car generator
(2) The wire car wire is used to connect the electrical equipment and control components on the car to pass the current and signals to form a complete automotive electrical control system. There are two types of car wires: low -voltage wires and high -voltage wires.
① Low -voltage wire. The low -voltage wire on the car is referred to as a low -voltage line. The cross -section is generally used in copper multi -core soft wires. The cross -sectional area of the wire is mainly selected based on the working current of the electric equipment. In order to ensure a certain mechanical strength, the cross section of the car electrical in the automotive electrical appliances must not be less than 0.5mm².
Table 1-2-1 The cross-sectional area and allowable current value of the low-voltage wire

The recommendation value of the 12V electric system's main circuit wires.
Table 1-2-2 12V The main circuit wire of the electrical system is recommended for the cross-area value
 
The color of the low -voltage wire is monochrome and two -color. The monochrome wire refers to a wire with an insulated surface as a color. The dual-color wire refers to the wire with two colors on the surface of the insulation. The large color in the double-color wire proportion is called the main color, and the color with a small proportion is called auxiliary color.
Wire color Chinese and English abbreviation comparison tab.

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