What is the national standard of grounding wire diameter

Ground wire diameter national standard ground wire diameter is usually not less than 1.5 times the diameter of the phase wire, in addition to grounding the electrical value is not to exceed 4 ohms. Under normal circumstances, the size of the actual equipment to protect the ground wire is greater than or equal to the table rated current corresponding to the cross-sectional area of the line. The role of the ground wire is actually still relatively large, such as the subway overhead ground can effectively reduce the number of contact contact network lightning flashover. In the installation of the grounding wire should also be in accordance with the formal method of operation, generally for the three-hole socket, the left side of the zero wire, the right side of the fire wire, and then connected to the grounding wire can be.

How to install the grounding wire?

1, the back shell of the socket is removed first.

2, take out the ground wire and heat it up with an electric complex iron.

3, use solder to connect the ground wire to the socket of the socket.

4.Correspond with the hole position of the ground wire and solder it tightly.

5, after the welding is completed, carefully check whether the welding is solid.

If you want to connect the wires, you need to distinguish what each wire is. Wires are usually divided into three categories, respectively, fire, zero, ground, in order to distinguish between these three types of wires, electricians usually use different colors of wire to distinguish.

Indoor ground wire 1.5 square can?

No, the ground with 1.5 square is not enough, home improvement grounding requirements is how much the power line, the ground with how big, now the power of household appliances are large, power line are 2.5 square, ground cross-section area should also be 2.5 square. 1.5 flat line can only be used in the lighting and ordinary low energy consumption of electrical appliances, safeguarded in terms of the wiring can be used to the function of the area of the split circuit.

Ground line as the name suggests in fact, that is, with the earth connected to the line, can also be called to protect the return line, when the emergency danger, there will be a high-voltage directly converted to the ground.