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When testing an earthing connection, we use a 60 or 100 candle bulb with a phase connected direct from supply and the other wire to the new earthing provided.If the bulb glows then the earth is ok.Else earth connection is not Ok.
So, why dont we can use all the home appliances taking a single wire from the phase and the return connection to Earth instead of return connection to neutral?
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Answer Posted / k.prakashchandra
100 W bulb draws about 0.5 A , hence the voltage drop for 5 ohm ER is about 2.5 V which is not noticeable . For 10 A load , the drop would be about 50 V .
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