What color is the ground wire

The ground wire is yellow and green interspersed, the yellow, green and red colors of the wire represent the A, B and C phases of the AC voltage respectively.

As we all know, the power cord is divided into several colors, each color represents a different line, so what color is the ground wire? Let's find out below.

According to China's current standards, GB2681 in the third according to the conductor color marking circuit, generally should be phase - A phase yellow, B phase green, C phase red. Zero line - light blue, ground is yellow and green, if the three-hole socket, the left is the zero line, the center (above) is the ground, the right is the fire wire.

Ground can protect personal safety: due to electrostatic discharge is prone to generate a large number of charges, if the electrical equipment does not get proper isolation, it will be very easy to electrical appliances themselves and the human body caused great harm, and the role of the grounding wire, coincidentally, is to become a high-voltage equipment and the earth between the conductor, to play to avoid people being charged with the purpose of injury.

The role of the grounding wire lightning: put in the past, once the occurrence of thunder and rain, poles and other equipment are often damaged because of lightning strikes, sometimes even days can not be used, so the role of the grounding wire in the role of lightning can be a very good protection, effectively extend the service life of electrical equipment.

Ground can ensure that the normal operation of the equipment: for some must have electricity to work, such as medical work, the role of the grounding wire is to avoid power outages encountered when the unexpected situation, not to be affected, still be able to operate normally a small load reference potential.

Now all circuits have leakage protector, if the bulb is connected to the firewire and ground will trip; specific approach is to prepare a good test bulb, send electricity, and then first test bulb inserted in the firewire and zero line jack, the bulb is normally bright; and then the test bulb inserted in the firewire and ground line jack, the leakage protector tripped the instructions for installing the ground and effective, the leakage protector does not trip the instructions for the ground. There is no ground wire.