1, black: the internal wiring of the device and the device.
2, brown: the positive pole of the DC circuit.
3, red: three-phase circuit and C phase;
The collector of a semiconductor transistor;
Semiconductor diodes, rectifier diodes or thyristors.
4, yellow: three phase circuit A phase;
The base of a semiconductor transistor;
Thyristor and bidirectional thyristor control.
5, green: three-phase circuit B phase.
6, blue: the negative circuit of the DC circuit;
The emitter of a semiconductor transistor;
Semiconductor diodes, rectifier diodes or thyristors.
7, light blue: three-phase circuit of the zero line or neutral line;
The neutral line of the DC circuit.
8, white: the main electrode of the triac;
    No specified semiconductor circuit with color.
9, yellow and green two colors (each color width of 15 to 100 mm alternating paste): safety with the ground wire
10, red, black parallel: with two-core wire or double stranded wire connected to the AC circuit.
 
When the wire color is selected by circuit
1, the exchange of three-phase circuit
    A phase: yellow;
B phase: green;
C phase: red;
Neutral or neutral: light blue;
Safety ground wire: yellow and green color.
2, with two-core wire or double stranded wire connected to the AC circuit: red and black parallel.
3, the DC circuit of the positive: brown;
Negative: blue;
Grounding center line: light blue.
4, the semiconductor circuit of the semiconductor transistor collector: red;
Base: yellow;
Emitter: blue.
Semiconductor diodes and rectifier diodes of the anode: blue;
Cathode: red.
The anode of a thyristor tube: blue;
Control pole: yellow;
Cathode: red.
Control of the two-way thyristor tube: yellow;
Main electrode: white.
5, the entire device and equipment, the internal wiring is generally recommended: black;
Semiconductor circuit: white;
When confusing: allow you to choose a color other than color
       (Such as: orange, purple, gray, green and blue, rose red, etc.).
6, the specific color, in a wire, in case of two or more can be marked, depending on the specific circumstances of the circuit, according to the circuit needs to express some kind of meaning for color.
Note: For a product (such as a ship electrical) bus, such as the international have been designated international standards, and the provisions of the provisions of 2.1 and 2.3 are different, also allowed according to the international standards for color standards color.