Everyone knows that several wires in the cable have different colors. What are these colors used for? Let me introduce you to what the color above the cable means.
Cable skin color cable wire sheath color specification.
National standard: yellow, green, red, blue, respectively, representing A.B.C.N
When the circuit is marked by the color of the wire
Black: Internal wiring of devices and equipment
Brown: The positive pole of the DC circuit
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
Yellow: phase A of a three-phase circuit
The base of a semiconductor transistor
The control pole of the thyristor and the triac
Green: Phase B of a three-phase circuit
Blue: the negative pole of the DC circuit
The emitter of a semiconductor transistor
A semiconductor diode, a rectifier diode, or an anode of a thyristor.
Light blue: the neutral or neutral of a three-phase circuit
The grounding neutral of the DC circuit.
White: the main electrode of the triac
There is no specified semiconductor circuit.
Yellow and green two colors (each color width is about 15~100 mm alternately attached); safety ground wire.
Red, black parallel: AC circuit connected by double-core wire or double stranded wire.
When selecting the color of the wire according to the circuit.
AC three-phase circuit
Phase A: yellow
Phase B: green
Phase C: red
Neutral or neutral, light blue
Safety ground wire: yellow and green
AC circuit connected by double-core wire or double stranded wire: red and black in parallel.
Positive electrode: brown
Negative electrode: blue
Grounding neutral: light blue.
Semiconductor circuits for semiconductor triodes
Collector: red
Base: yellow
Emitter: blue
Semiconductor diodes and rectifier diodes
Anode: blue
Cathode: red
Thyristor
Anode: blue
Control pole: yellow
Cathode: red
Two-way thyristor
Control pole: yellow
Main electrode: white
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 etc.
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