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But these parts of the equipment may carry current in the case of insulation failure or leakage. While phase and neutral are connected to the main wiring, electrical earthing may be connected to the body of the equipment or to any system which in normal condition does not carry current. Neutral is a return path for an AC circuit that is supposed to carry current in normal condition.Įlectrical earthing or grounding is for safety concerns against leakage or residual current on the system through a low resistance path. The metal structure of indoor, outdoor sub-station, metal conduits, etc.ĭifference between Electrical Earthing and Neutral.Frame board of switchboards and control panel.The frame, tank, and enclosure of electrical machines, transformers, and other electrical equipment.The components that must be earthed to the point of electrical earthing are as follows: Components to be Earthed by Electrical Earthing This type of electrical earthing system deals with earthing of non-current carrying parts of the equipment to ensure the safety of personal and protection due to lightning.
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This type of electrical earthing system deals with earthing of the system’s neutral to ensure system security and protection.Įxamples of such an electrical earthing system are the connection of neutral points of star-connected three-phase winding of generator, transformer, or motors to the ground. Types of Electrical Earthing 1.System or Neutral Earthing Calculation of Earth’s Resistance for Electrical Earthing.Factors Influencing the Earth Resistance in Electrical Earthing.Rules and Regulation of Electrical Earthing.Difference between Electrical Earthing and Neutral.Components to be Earthed by Electrical Earthing.2.Equipment Earthing or Safety Earthing.