Building an Earth Pit

Can any body please tell me the minimum distance between two earth pits?

Kindly tell me the reply of the following questions

1. Can we use the smaller size of Earthing Plate in place of 500 X 500 X 10 mm plate

2. Can we use Copper or Zinc plate in place of GI Plate ?

3. Can we use one Copper Strip in place of two GI Strip ?

Thanks

Avinash Kumar Pandey

Mr. Avinash Kumar Pandey

Following is the reply of your questions regarding EARTH PIT for Electrical & Electronic Equipments.

1. No, you cannot reduce the standard size of Earth Plate, which is easily available in the local market. If you are reducing the size of Earth plate means you are reducing the contact area of Earth plate with soil, which will create a high resistance causing low current absolving capacity.

2. Yes, you can use Copper plate, but you cannot use Zinc plate instead of Copper & GI earth plate because the melting point of Zinc is lesser than Copper & GI metals. The conductivity & resistance of Zinc plate is also bad in respect with Copper & GI metals plate.

3. Yes you can use Copper Strip but the number will be always two for fool prove durable long life operation. We should also see the cast of Earth pit.

Thanks

B. Kumar

(C.E NTPC)

Mr B. Kumar

I want to know more about the following points.

(a) What is the relation of Earth plate with Load & Short Circuit Current?

(b) What is the relation of Earth plate size with Earth pit resistance

(c) Is it better to use Copper Earth Plate & Copper Strip in place of GI Earth Plate & GI Strip?

Thanks

Adeeb Raza

Hi Adeeb Raza

Earth Pit is a very beg & practical topic in the field of electrical engineering

You will get some information if you see how to decide the size, type of lightening arresters for buildings and what should be the distance between two lightening arresters etc.?

See the construction of an Advance type of Earth Pit click on the following link http://sabosystems.tradeindia.com/Exporters_Suppliers/Exporter15409.231995/Maintenance-Free-Earthing-Safe-Earthing-Electrode.html

Thanks

Baukatis

Remember the following point in your mind if you are constructing an Earth pit for your Home/Office and Industrial application.

(a) Choose the Earth Plate according to the Load and short circuit current capacity of your installation. A bigger Earth Plate is always preferable and safe in operation.

(b) Choose the deepness of an Earth pit minimum 8 to 10 feet but you can go more the 10 feet in hill & rock area where the soil is not available at 10 feet.

(c) Always check earth resistance & voltage between N to Earth point every three to four month especially in hot season.

(d) If the resistance is more than 1.0 Ohm or the voltage between N to Earth point is more than 2.0 Volts then use water in the Earth pit

Thanks

B Kumar

1) How to make the Electrical earthing Pit?

2) Electrical Earthing Pit and the Lightning Arrestor Earth Pit can be the same!

3) do we use the same pit for electrical earthing and the Lightning Protector.

can any body tell me what is the process of layer forming(i.e. sand,salt & charcoal) during making of test pit.