The grounding is a safety mechanism which is part of the electrical installations and that consists of drive possible deviations of the current to the land , preventing the user from coming into contact with the electricity .
This means that a certain sector of the facilities is connected, through a conductor, to the ground so that, in case of an unforeseen derivation of the current or from a failure of the insulation, people do not get electrocuted when they come into contact with the devices connected to said installation.
Ground wire, grounding hole or grounding connection are other names given to this union, which began to be used as early as the 19th century. Specifically, it began to be used when the use of telegraph systems was extended.
When launching a grounding installation, it must be borne in mind that two fundamental elements such as land, which is the land where the relevant energy or electricity will be dissipated, and the grounding This connection or installation, on the other hand, consists of electrodes or javelins, earthing terminals, the line of connection with the earth and, finally, the protective conductors.
Also called ground pole or grounding , grounding involves the use of a piece of metal that is buried in the ground and can even be connected to the metal sectors of a structure . Through a insulating cable , this piece of metal is connected to the electrical installation and, through the plug bases, to the devices connected to electricity. The grounding also includes the use of a differential switch that is responsible for opening the electrical connection when registering a current flow to the ground.
The earth is, in short, a surface that can dispel the electrical current it receives. What we call grounding consists of a mechanism that has buried metal parts (called javelins , spades or electrodes ) and drivers of different classes that link the various sectors of the installation.
The lighting rod , for example, they work with a grounding system, leading the discharge to a low resistance ground.
In addition to all of the above, we cannot ignore the fact that there are three different types of earthing or earthing:
1-DC system. It is the one that occurs in numerous technological devices that are currently part of our life, such as computer cards, and is identified because it occurs as a difference from the voltages of existing circuits.
2-AC ground system. It is the one that is known in a more generalized way and the one that takes place due to the difference in voltages in buildings and constructions of different types.
3-Electrostatic ground system. The interrelation between the load of a container and its fluid is what propitiates this.