According to the requirements of electrical lightning protection and grounding setting, buildings can adopt common grounding and common grounding to set total grounding electrodes, with no less than 2-3 in each group. To use * * *, it is necessary to set an equipotential box at the front end of each layer of electrical equipment and connect an equipotential equalizing ring. Lightning protection is realized by connecting the roof lightning protection belt and passing through the lightning protection downlead and equalizing ring.