Summary:1. AC three-phase circuit: A phase: yellow. Phase B: Green. Phase C: red. Neutral or neutral, light blue. Safety ground wire: yellow and green.
2. AC...
1. AC three-phase circuit: A phase: yellow. Phase B: Green. Phase C: red. Neutral or neutral, light blue. Safety ground wire: yellow and green.
2. AC circuits connected with twin-core wires or twisted-pair wires: red and black in parallel.
Third, the DC circuit: positive: brown. Negative: blue. Ground neutral: light blue.
Fourth, the semiconductor transistor of the semiconductor circuit: collector: red. Base: Yellow. Emitter: blue. Anodes of semiconductor diodes and rectifier diodes: blue. Cathode: red. Anode of the thyristor: blue. Control pole: yellow. Cathode: red. The control pole of the triac: yellow. Main electrode: white.
5. The internal wiring of the whole device and equipment is generally recommended color: semiconductor circuit: white. When there is confusion: allow selection of other colors (such as orange, purple, gray, green blue, rose red, etc.) other than the designated color.
6. In the case of specific color marking, if there are two or more colors that can be marked on
a wire, depending on the specific situation of the circuit, the color will be fixed according to a certain meaning that needs to be expressed in the circuit.
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