Every building that is connected to the grid needs to be properly earthed to the ground for safety reasons. The earthing will help to create a short circuit that will burn out the fuse whenever a person touches a live wire. Earthing also helps to make buildings lightening-safe. When struck by lightening, the lightening arrestor in the building will direct and discharge the high voltage and current straight to the ground. This will prevent the building from catching fire. The earthing technology will also ensure that electrical appliances in the building do not get fried by the high voltage.
Earthing or grounding is normally done by burying a thick and wide copper metal plate several feet beneath the surface and a solid metal rod connecting the plate to the electrical system in the building. Earthing can also be done by connecting the earth wire to metallic water pipes in the plumbing system.