- Limit the tension that metallic masses present with respect to the ground
- Provide the discharge point for the housings, frame or installations.
- Ensure that non-current parts, such as equipment frames, are always at ground potential, even in the event of a failure in insulation.
- Provide an effective means of unloading feeders or equipment prior to servicing.
- Eliminate or reduce the risk of a breakdown in the electrical equipment used.
An efficient ground connection is important because the system responsible for the preservation of human life, machinery, appliances and lines of great value is responsible. To locate the ground connection, the underground installation plans of: electrical, sanitary, water and gas installations must be taken into account. Likewise, the presence of liquids, gaseous fuels and other structures that may interfere must be avoided. It is also advisable to avoid humid places such as gardens, patios and where there is vehicular traffic.
Grounding system types
Grounding of electrical equipment. Its purpose is to eliminate touch potentials that could endanger life and equipment. This type of system is used to ground all the elements of the installation that under normal operating conditions are not subject to voltages, but that may have a potential difference with respect to ground due to accidental faults in the electrical circuits.
Grounding for electrical systems. The purpose is to limit any high voltages that may result from lightning strikes or from unintended contact with higher voltage cables.
Grounding in electronic signals. To avoid contamination with signals at frequencies other than the desired one. It is achieved by shielding of all kinds connected to a zero reference or to ground.
Electronic protection grounding. To avoid the destruction of semiconductor elements by overvoltage’s. Protection devices are placed in order to limit the overvoltage peaks connected between the active conductors and ground.