White cable

A white wire basically represents the public wire. In addition, it may also represent the live wire, so it cannot be determined uniformly. When wiring, for the sake of safety, you can use an electric pen to detect it to prevent wiring errors, which will cause great circuit faults.

Wire and cable color

According to the provisions of the national standard (GB681), in order to facilitate the identification of the functions and types of various conductors in the complete set of devices, the color marks of various conductors are clearly specified as follows: 1. Yellow - the first phase of the AC three-phase circuit; 2. Green - the second phase of AC three-phase circuit; 3. Red - the third phase of AC three-phase circuit; 4. Light blue - zero line or neutral line of AC three-phase circuit; 5. Yellow and green two-color wire (black) - ground wire.

The color of wires and cables represents the meaning

The color of the wires is black, white, green, red, blue, orange, brown and gray. The color of the insulation sheath outside the wires usually has its own meaning; When connecting wires, you should also determine the meaning of each colored wire. The blue line represents the zero line, the yellow, green and red lines usually represent the u, v and w phases of the three-phase line, namely the live line, and the yellow and green two-color line represents the protective grounding wire. In addition, white is rarely used, and black is used for connecting wires in electrical equipment boxes and cabinets. Red is the live line, blue is the zero line, and yellow or yellow and white are the most common ground wires; Yellow, green and red represent phase lines. It can also be said that the fire wire is charged. Blue represents working zero, which can also be called zero line. This line is usually not electrified, but sometimes it is electrified. That is, when the zero line is broken, this line will be electrified. The two-color represents the ground wire. This line is the safest. The role of this line is to electrify people after the zero line is broken and help the leakage trip.