Earthing means connection of non-current carrying parts (metallic parts) of electrical apparatus to the world to discharge power with none danger. Earthing is finished by connecting the appliance or machinery to earth by good conductor referred to as earth electrode. Earthing is finished to save lots of human life from the danger of reflex, just in case physical structure comes in contact with actor of electricity. If earthing is finished correctly and therefore the metallic part comes up-to-date with actor, it'll be discharged into the world. during this condition thanks to zero potential of earth an over sized amount of current flows to the world. If the current exceeds the limiting value of the fuse, it blows off or MCB trips and cuts off the appliance from supply.
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