Used alone as a ground wire for a small power air conditioner, 2.5 square meters is enough. Personally, I don't think it's necessary to ground the ground stake by driving it into the ground yourself. Is there no ground wire in the incoming power box of the power supply office?
If you want to connect wires, there are no real regulations as to how deep they must be driven into the ground. Generally, it is calculated based on a grounding resistance value of less than 3 ohms. The depth varies depending on the actual conditions of each location. It is recommended to install a leak protection device on the air conditioning inlet line.
Diesel generators must be grounded. There must be a suitable ground wire. Once a leak occurs, a loop will occur with ground, affecting serihuman security.
Protective earthing of diesel generators is used in ungrounded three-phase power neutral point systems. Its function is that once the insulation of electrical equipment is damaged and leakage occurs, the human body comes into contact with the energized shell. At this time, the resistance of the human body is much greater than the resistance of the body to the ground (40). , and a large amount of point current escapes to the ground through the metal shell, and the ground voltage may drop below the safety voltage of 36V.
Its function is the following: When the insulation structure of a certain motor winding has been damaged and the shell is loaded, if it is not grounded and the human body touches the shell, it is equivalent to a single - electric shock phase, and a risk of electric shock may occur.
If groundinghe protection is used, when the human body touches the shell, the resistance of the human body is connected in parallel with the resistance of the earth since the resistance of the human body is much higher than the resistance of the earth. , the current passing through the human body will be very small and no danger of electric shock will occur.
Detailed Information
The following points should be noted when wiring the diesel generator set:
1. The ground wire connection point. is usually at The chassis end of the diesel generator set should be connected to a suitable ground wire location when installing the ground wire.
2. The alternator neutral ground wire connection is usually determined by the user during installation. When the diesel generator set is used as the sole power source, the neutral wire should be directly connected to the groundfactory land. thread.
3. For more complex installations, the grounding midpoint should be selected to ensure proper operation of the diesel generator set or protective equipment, such as earth fault detection and minimization of circulating current at the earth.
4. The ground wire must be arranged in accordance with the recommendations of the user and local authorities.
5. Ensure equipment wiring is effectively maintained at all times. Maintenance of the wiring system must be carried out in strict accordance with the instructions.
Baidu Encyclopedia-Diesel Generator