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What do you mean by the term local earthing? Explain how it is done.

Household Circuits

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Local earthing is done in the house near the kWh meter.

What do you mean by the term local earthing? Explain how it is done. Household Circuits, Concise Physics Solutions ICSE Class 10.

For this purpose, a hole nearly 2–3 metre deep is dug in the ground. A copper rod (or a thick copper wire) covered by a hollow insulating pipe, is inserted in the hole. A thick copper plate of dimensions 50 cm × 50 cm is welded at the lower end of the copper rod and it is buried inside the ground.

The plate is surrounded by a mixture of charcoal and salt to make a good contact between the plate and the earth. To keep the ground damp, water is poured through the pipe from time to time. This forms a conducting layer between the plate and the ground. The upper end of the copper rod is joined to the earth connection at the kWh meter.

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