What is the function of equipotential bonding junction box?

Equipotential bonding junction boxes are usually used in electrical devices of houses, hospitals and industrial and civil buildings. It connects the metal objects in the building (such as steel bars, water pipes, heating pipes, metal basins in toilets, electrical equipment, etc.) to the equipotential connection terminal box to form an equipotential body, thus providing a relatively uniform potential in case of electric leakage or lightning strike, reducing the potential difference and avoiding dangerous contact voltage.