Why is the grounding resistance measured by a multimeter as small as possible?
The smaller the resistance, the smaller the resistance for the current to pass, so if there is leakage, all the electricity will be uploaded from the grounded ground wire to the ground.
There are many types of grounding, such as lightning protection grounding (that is, the common lightning rod): the smaller the grounding resistance, the faster the lightning discharges to the ground through the grounding wire once it is struck by lightning, that is, the safer it is; electrical equipment is safely grounded (such as The washing machine casing is grounded): The smaller the grounding resistance, when the casing leaks, the leakage will be transmitted to the ground through the grounding wire. If the grounding resistance is too large (if it is greater than the human body resistance), when a person touches the casing, the human body becomes The ground wire, the current flows from the human body into the earth, that is, electric shock; and the working grounding inside the electronic equipment, etc., the smaller the better.
