The ABC wire type represents three-phase electricity, and the national standard ABC corresponds to yellow, green and red.

Three-phase five-wire system: including three phase lines of AC (A, B, C lines), neutral line (N line), and ground wire (PE line).

The standard wire colors of the three-phase five-wire system are: A wire is yellow, B wire is blue (green), C wire is red, N wire is brown, and PE wire is yellow-green or black.

Generally, red is the live wire and blue is the neutral wire. The live wire and the neutral wire are both live wires. If the two-phase power supply is connected to an electrical appliance, then there will be current flowing through the wires. Extended information

1. Color distinction: Phase A is yellow, phase B is green, phase C is red, neutral line N is light blue, and protective ground wire PE is a yellow-green two-color line. The black wire in the cable is the protective earth wire (PE).

2. From the perspective of spatial arrangement: We are facing the front of the power distribution panel. The vertical arrangement is A, B, and C from left to right, and the horizontal arrangement is A from inside to outside. ,B,,C, the view of arrangement is from top to bottom A,B,,C.

3. Distinguish from the letters of electrical engineering letters: ABC, corresponding to the following letters: L1, L2, L3, U, V, W and R, S, T.

Through the above method, the ABC of the three-phase phase lines can be quickly distinguished, so as to correctly judge the phase sequence of the three-phase electricity and achieve accurate wiring purposes.