According to regulations, the insulating protective sleeve used for ground wire should be yellow and green, while red and brown protective sleeves are mostly used for live wire, and blue or green is generally used for zero wire. When we check and repair the wires behind the socket, we must close the switch in the house in advance so that we won't get an electric shock. How to distinguish wires according to color? The wires used in our home can generally be divided into live wire, zero wire and ground wire. These wires are usually wrapped with insulating protective covers of different colors. We can distinguish which kind of wires they are according to the color of these protective covers.
According to the regulations, the protective cover used for the ground wire of the three wires of live wire, zero wire and ground wire should be yellow and green. The rest of the live wires are mostly red and brown, and the zero wire is mostly blue or green.
If we want to repair and check the wires behind the socket by ourselves, we must close the switch in the house in advance, so that we won't be hurt by contacting the current when we touch the wires.