Grounding(Earthing) systems connect particular portions of an electric power system to the ground often the Earth’s conductive surface for safety and functionality.
The selection of an earthing system might have an impact on the installation’s safety and electromagnetic compatibility. Regulations for earthing systems vary greatly between nations, however, most adhere to the International Electrotechnical Commission’s guidelines. Special circumstances for earthing in mines, patient care facilities, or dangerous regions of industrial operations may be identified by regulations.
Other systems, in addition to electric power systems, may require grounding for safety or function. Lightning rods may be used as part of a system to protect tall structures against lightning strikes. Telegraph lines can use the Earth as one of the circuit’s conductors, reducing the cost of installing a return wire across a lengthy route. Radio antennas may require special grounding to function properly, as well as to reduce static electricity and offer lightning protection.