What do the wires of various colors stand for? Today, Xiaobian brings everyone together to find out!
1, black
Internal wiring of devices and equipment.
2, brown
The positive pole of the DC circuit.
3, red
Phase C of a three-phase circuit;
a collector of a semiconductor transistor;
A cathode of a semiconductor diode, a rectifier diode, or a thyristor.
4, yellow
Phase A of a three-phase circuit;
The base of the semiconductor transistor;
The control pole of the thyristor and the triac.
5, green
Phase B of a three-phase circuit.
6, blue
The negative pole of the DC circuit;
The emitter of a semiconductor transistor;
The anode of a semiconductor diode, rectifier diode or thyristor.
7, light blue
Neutral or neutral line of a three-phase circuit;
The grounding neutral of the DC circuit.
8, white
a main electrode of the 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
An AC circuit connected by a double-core wire or a double stranded wire.
When selecting the color of the wire according to the circuit
1, 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.
Schedule: National three-phase wire color requirements standard
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