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There are three types of leakages in current are following. |
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1.Phase to earth shorting |
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2.Leakage of current to earth |
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3.Wet walls and electrical shocks |
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1.Phase to earth shorting: |
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If phase wire in an appliance gets in touch with the body of the instrument, the current starts flowing through the earth as a parallel circuit. |
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If proper earth connection through earth pit (hole in the ground) exists, a huge current will flow. |
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2. Leakage of current to earth: |
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If the phase wire is connected with the body of the instrument through a resistance, some amount of current will flow through earth. |
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There will be no short (distance) ----between the phase and the earth and the fuse may not blow out. |
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If the instrument has in touch with earth properly, the leakaged current will go to earth. |
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If a person touches the body of the appliance, he would not get any shock. |
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If earthing of the instrument is not proper, some current will flow through the body and we will feel shock. |
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3. Wet walls and electrical shocks: |
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If the water from any source comes in contact with live electric wire either in a switch plate or naked joint, the conduction of current will start via water through earth. |
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The entire wet wall will start giving shock. |
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If the earth path through building walls and floors has considerable resistance, the amount of current will be minimum. |
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If supply is on, the water touch with naked wire will cause the same shock as with live wire. |
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