House grounding wire is an important measure to ensure the electrical safety of the family, a good grounding system can effectively prevent electrical equipment leakage to people and things to cause harm, in addition, the grounding wire can play a certain role in lightning protection, effectively prolong the service life of electrical equipment. So how to connect the ground wire of the house?What should I pay attention to with the grounding wire?
The steps for the house grounding wire are as follows:
1. Select the grounding body material: 2A 5-metre long steel pipe, angle iron or round bar is used as a grounding body.
2. Make a grounding body: cut one end of the selected material into an oblique or sharpened cut in order to smoothly drive into the ground.
3. Choose the right grounding location: Choose a damp, low-lying place near the house, usually the corner of the house or a place far away from the house structure, and ensure that there are no other conductive objects around the grounding body.
4. Install the grounding body: drive the grounding body vertically into the ground to a depth of about 2 meters, and release resistors around the grounding body, such as a mixture of toner and soil or a layer of soil and a layer of salt, to reduce the grounding resistance.
5. Connect the grounding wire: use a welding machine to weld one end of the grounding body and the flat iron, and then introduce the other end of the flat iron into the room and connect it to the ground wire position of the distribution box.
6. Test the grounding resistance: After the grounding body is done, the grounding resistance needs to be tested to ensure that it meets the national standard (the grounding resistance is generally required to be less than 4 ohms).
7. Maintenance of the grounding wire: regularly check the condition of the grounding wire to ensure the effective operation of the grounding system.
What should I pay attention to with the grounding wire?
1. The grounding wire must be connected to a good grounding body on the ground or underground, and shall not be shared with other equipment or wires.
2. The conductor of the grounding wire should select a sufficient cross-sectional area to ensure that enough current can flow through in a short time, so as to ensure the effect of protection.
3. The insulation of the grounding wire should meet the requirements of electrical equipment to ensure that the insulation is intact and there will be no leakage.
4. The installation of the grounding wire should meet the safety requirements, and a standardized grounding method should be adopted to ensure the principle of easy operation and small pressure drop.
5. When the maintenance of electrical equipment is carried out, the power supply and grounding wire must be cut off to avoid the occurrence of electric shock accidents.