Grounding system:

grounding system Power supply systems, an earthing (grounding) system conductive surface of the earth's electrical capacity that defines relative conductors. The choice of security and power supply grounding system for electromagnetic compatibility has implications. Note that the rules for grounding systems vary much between different countries. An electric shock of a functional relationship of the earth to provide protection against other works.

A protective earth connection, in contrast to a functional earth connection may take one device current during normal operation. Such growth suppression and electromagnetic Functional Earth Connection - Compatibility Filter as required by equipment, the antennas and various measurement equipment of some kind. Generally, a functional planet Earth as security is used, although this requires care in some cases.