There are two main types of grounding equipment commonly used for ground rod , namely protective grounding (grounding of household electrical equipment or power supply lines).
Protective grounding equipment
Protective grounding is a necessary grounding measure in the family. The most common household grounding equipment is the grounding wire and grounding rod. The grounding wire is the metal wire, which is mainly used to transmit leakage current and static charge. Grounding rods, also known as grounding electrodes or grounding nets, are mainly used to introduce the leakage current, static charge or lightning current sent by the grounding wire into the ground.
When houses and buildings need to be grounded, the power ground wires in the house are generally connected together, and a ground rod with good conductivity is used to insert it into the ground to a certain depth. The depth should be determined according to the amount of current in the house as a whole, and the ground wire and ground rod should be connected together.
Most household appliances that people use daily need to be grounded. In household appliances, if grounding protection is not used, when a part of the insulation is damaged or a phase line touches the metal shell, the metal shell of the household appliance will be charged. If the human body touches the metal shell of the appliance at this time, there will be a risk of electric shock. The field must be grounded, and the electrical outlet must be connected to the ground.
Lightning protection grounding equipment
Lightning protection grounding equipment is generally used on the top of high-rise buildings, mainly used to prevent lightning strikes. Commonly used lightning protection grounding equipment includes lightning rods, lightning belts, lightning nets or lightning arresters. The lightning protection grounding equipment generally consists of a lightning receiving device, a grounding wire and a grounding device. These devices cooperate with each other to introduce lightning current into the ground for protection. The lightning receiving device is located on the top of the lightning protection grounding device and is a component that directly receives lightning strikes. Its function is to use its prominent position higher than the protected object to lead the lightning to itself, and use the grounding wire or ground rod to introduce the lightning into the ground.