When the circuit is marked by the color of the wire
1. Internal wiring of black devices and equipment.
2, the positive pole of the brown DC circuit.
3, red three-phase circuit and phase C;
a collector of a semiconductor transistor;
A cathode of a semiconductor diode, a rectifier diode, or a thyristor.
4. Phase A of the yellow three-phase circuit;
The base of the semiconductor transistor;
The control pole of the thyristor and the triac.
5. Phase B of the green three-phase circuit.
6. The negative pole of the blue DC circuit;
The emitter of a semiconductor transistor;
The anode of a semiconductor diode, rectifier diode or thyristor.
7. Neutral or neutral line of light blue three-phase circuit;
The grounding neutral of the DC circuit.
8. The main electrode of the white bidirectional thyristor;
There is no specified semiconductor circuit.
9, yellow and green two colors (each color width is about 15~100 mm alternately attached)
Safety ground wire.
10, red, black parallel AC circuit with double-core wire or double stranded wire.
When selecting the color of the wire according to the circuit1, AC three-phase circuit
Phase A: yellow;
Phase B: green;
Phase C: red;
Neutral or neutral: light blue;
Safety ground wire: yellow and green.
2. AC circuit connected by double-core wire or double stranded wire:
Red and black in parallel.
3. DC circuit:
Positive electrode: brown;
Negative electrode: blue;
Grounding neutral: light blue.
4. Collector of semiconductor triode of semiconductor circuit: red; base: yellow; emitter: blue.
Anode of semiconductor diode and rectifier diode: blue;
Cathode: red.
Anode of the thyristor tube: blue;
Control pole: yellow;
Cathode: red.
Control electrode of the two-way thyristor: yellow;
Main electrode: white.
5, the internal wiring of the entire device and equipment is generally recommended: black; semiconductor circuit: white; when there is confusion: allow the selection of other colors outside the color (such as: orange, purple, gray, green blue, rose red, etc.).
6. When the color is specified, if there are two or more kinds of calibratable colors on one wire, depending on the specific condition of the circuit, the color should be fixed according to a certain meaning that needs to be expressed in the circuit.
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