The purpose of this grounding system is to prevent danger to people who may be harmed by electric shock by touching the frame or covering of electrical appliances that are metal or materials that are electrical conductors that have leakage current (Leakage Current), causing the electric current to flow through the body of the person touching it to the ground. This electric current leakage may be caused by the electrical insulation of the electrical appliances being damaged or not installed correctly. This ground wire will act as a path for the electric current to leak into the ground conveniently because it has lower resistance than the human body. The electric current will flow through the point where the ground wire is installed on the electrical appliance to the ground rod that is stuck in the ground, causing this leakage current to return to the source safely without causing danger to the user of electricity. On the other hand, if the electrical system does not have a grounding system installed, the electric current leaking from the equipment or electrical appliances will flow into the ground through the body of the person touching it, causing the person touching it to be electrocuted. And if the person touching the body has low resistance, such as being wet or the floor is wet, the electric current will be able to flow through the body more easily. Therefore, the person touching the muscle will contract, be unable to control themselves, lose consciousness, and when being electrocuted for a long time, it will cause heart failure and eventually death. In addition to the purpose of preventing loss of life, grounding is also useful in many ways, such as helping the leakage current protection device to work more correctly. Grounding is also used in the circuit of instrument transformers (Instrument Transformers) such as Current Transformers (CT) and Voltage Transformers (VT) to avoid potential differences at the secondary side and prevent incorrect operation of the protection relay and meter readings.