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What is the Meaning of Different Electric Wire Insulation Colors?

The operation of power cables is one of the important links in our daily life, work, and production. I wonder if you have noticed that the colors of the electric wire insulation layers of house wiring electric wires are different, so what do they mean? Let me introduce to you the meaning of the different colors of the wire insulation layer

What are the colors of house-wiring electric wires?

House wiring electric wires are generally divided into 6 colors: red, yellow, blue, green, black, and yellow-green.

Phase wire (indicated by L): red, yellow, green

Neutral line (indicated by N): blue

Ground wire (indicated by E): green-yellow


1. House wiring electric wire

When decorating the home, it is recommended that the phase wire only choose one color yellow, green, or red. It should be noted that: the phase wire must be red, the neutral wire should be blue, and the ground wire should be yellow and green as required.

If there is a 380V voltage in the home, then the three colors of the phase wire must be selected. At this time, we can choose yellow, green, and red according to the circuit of the air opener, and use these three colors to distinguish different circuits.

2. The advantages of wire color

Different cables are required to use different colors, in order to correctly distinguish the phase wire, neutral wire, and protective ground wire in the wires, and prevent wrong operations. Generally, electricians will separate the colors according to the requirements.

If the wire color is used randomly, there will be safety hazards in future use and maintenance processes. For example, for the sake of convenience and material saving during circuit modification, yellow wires are used as phase and neutral wires. During future maintenance, it will be difficult for electricians to find the phase and neutral wires, which will bring inconvenience to maintenance and easily cause construction safety accidents.

Install the wires according to the specified colors, we can clearly see the phase wire, neutral wire, and ground wire, reduce the possibility of wrong connection in the line, and facilitate future maintenance. Play a very good protective role. Therefore, the color separation of the wires in the circuit is very important. When we decorate our home, we must separate the colors of the wires. If the installed lines do not have a uniform color separation, it is recommended to mark the lines separately and clearly mark them on the circuit diagram for future viewing.
electric wire and cable
In order to improve the safety of home circuits, we recommend using low-smoke halogen-free flame-retardant cables as house-wiring electric wires. Cable production always uses high-purity oxygen-free copper conductors to prevent overloading, and at the same time, uses self-developed environmentally friendly materials as insulation, which greatly reduces the risk of leakage and short circuit, so that cables that meet the national standard can truly protect our lives, bringing multiple protections to you and your family.
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