How to wire the equipotential bonding junction box?
Use equipotential bonding terminal box to connect all protective ground wires in the building to the same point not less than 4mm2. Wires concealed on the floor and wall should pass through plastic pipes, and the metal resistance in equipotential bonding and junction box should not be greater than 5Ω. In Hiroshima classic, jumper wires are not allowed, and the lines of sewage pipes should be connected point to point.
Definition of equipotential bonding junction box
The equipotential box is the equipment box, and the equipotential of the equipotential connection terminal box is equipotential. If two test points are selected on a live line, and there is no voltage and potential between the two test points, then the two test points are equipotential, that is, they have no resistance.
The function of equipotential connection junction box in the building is to connect all electrical equipment and other exposed metals and other conductive parts with artificial and natural grounding bodies. Simply put, even if there is leakage, the water pipe is not completely insulated from the earth, and the voltage is relatively small, ranging from several volts to several tens of volts at most. The internal resistance of human body is about 2000 ohms when it is dry, which will only cause numbness and pain to human body. However, if the humidity of the human body is high when taking a bath, the resistance will also drop, and even a voltage of tens of volts will generate a large current, which will lead to ventricular fibrillation and even the destruction of nerve cells, which may lead to death.
Open electric water heaters are very dangerous. When the water heater takes a bath, it is necessary to close the water inlet. There is no grounding gas at this time. The water heater is insulated from the earth. If there is a leak, the current will pass through the released hot water everywhere, which is very dangerous when taking a bath. Therefore, it is necessary to ground the electric water heater normally. In order to prevent this kind of accident, it is necessary to drain water pipes, gas pipes, heating pipes, etc. , may be charged, take it out from where people may touch it and lead it out with wires. The equipotential junction box works here.
Editor's summary: So much for the information about equipotential bonding junction box. I believe that after reading this article, you have a better understanding of this electrical appliance and know that it is a facility to prevent electric shock.