AC power cable installation:

The mains (AC) wiring installation, the earth is made of wire electrical connection to the earth. By combining the electrical equipment on the ground, any damage to the insulation will cause current to flow to the ground, which otherwise stimulate the equipment. Proper binding of the earth will cause overcurrent protection circuit operational de-energize the damaged region. By binding (interconnecting), all present at the exposed than the metal objects and any current bugs in the system will not produce dangerous tensions which could cause electric shock.

Networks "grounding conductor" is connected - directly or indirectly - with one or more electrodes of the earth. May be local, far away, the network provider, or in many cases both. Grounding wire is usually but not always associated with the "neutral wire" at some point, maybe even a guide for the shares of the common parts of the system under certain conditions. Ground wire is usually connected with piping to keep the same potential as the electrical ground during fault. In the past, the water pipes were often used as a ground electrode, but it was banned in some countries, when the plastics such as PVC piping has become popular.

This type of substrate used radio antennas and lightning protection systems.

Network, or "land power" is used to provide a return path for fault currents and can fuse or circuit breaker disconnects. Mass power is also often associated with the incoming house piping and cables entering the bathroom are sometimes related to the cross. This is done to reduce the potential difference between objects that may come into contact simultaneously.

Filters also connect to the earth power, but this is mainly due to the cessation of the exercise of power noise filter systems to protect, rather than as a direct energy use of land. Permanently installed electrical equipment is usually permanently connected to the grounding wire. Portable electrical equipment with metal cases can be connected to ground by connecting pin in the plug. (see the home network plugs and sockets). Cross-sectional area of land power is usually governed by local or national wiring rules.