Electrical Earthing

The earthing system is an essential element for the electrical system security and it is required to:

Allow for protective devices activation when there is an insulation fault.

Equalize the potential of conductive parts that can be accessed simultaneously, with the potential in the surrounding soil in order to prevent people from being exposed to hazardous voltages.Allow the lightning strike energy to be safely dissipated. To reduce electromagnetic interferences.

EARTHING system has three main purposes:

1. Over voltage protection
   Lightning, line surges or unintentional contact with higher voltage lines can cause dangerously high voltages to the electrical distribution system wires. Earthing provides an alternative path around the electrical system of your home or workplace minimizes damage from such occurrences.
2. Voltage stabilization
   There are many sources of electricity. Every transformer can be considered a separate source. If there were not a common reference point for all these voltage sources it would be extremely difficult to calculate their relationships to each other. The earth is the most omnipresent conductive surface, and so it was adopted in the very beginnings of electrical distribution systems as a nearly universal standard for all electric systems.
3. Current path in order to facilitate the operation of over current devices
   This purpose of Earthing is the most important one to understand. Earthing system provides certain level of safety to humans and property in case of equipment damages.