Distance Between Two Earth Pits

It appears that PO does not have a copy of the IS and is not in a position to purchase it or get it ( He may be living in a remote place or what ever be the reason)so he might have put up here to get the contents from members who know it.This we can understand . Good that he got the answer but the PO should have the courtesy at least to respond to the reply which most of the members and specially questions by anonymous posters seldom do and that irritates most. If any member make an adverse coment about the posting then it will be considered as rude behavior by few members.

Supposition. The forum cannot possibly know that from the original posting on this thread.

As per IS 3043 & IEEE 80 we should maintain minimun "double the length of the earth electrode " ie if your earth electrode length is of 3 mtr then the span length between two earth pit should be 6 mtr .

Please tell me the locations of two earth pits. Then I can tell you the distance. For example;- 1 pit in California , other pit in New york. Approximate distance is 4,688 kms.

Is it Plate Earthing or Pipe or Rod Earthing or Strip or Conductor Earthing?

Vide Clause 9.2.1 of IS 3043, for plate earthing, the normal separation distance between two plate earth electrodes is 10 meters, but a separation of 2 meter also can give you sufficient gain.

Vide Clause 9.2.2 of IS 3043, for pipe/rod earthing, the mutual separation should be equal to the driven depth of the electrode, but a substantial gain is effected even at 2 meter separation.

And, vide Clause 9.2.3, for strip or conductor earthing, the minimum separation distance should be 2.4 meter.

First get a copy of IS 3043 and study it carefully. This is the basic requirement for working in an electrical field.

Can you please say why such a difference for different type of eathing & what the meant by "Gain"?

What is meant by"sufficient gain"?Please explain.

Distance between two earth pits ? Earth pit for what purpose ? The question does not carry any sense.
The IS 3034 is a document comprising of 84 pages and 40 sections and sub sections.
Each section give elaborate description of earthing and calculation of earthing details about each and every earthing requirements. This include Domestic,Industrial , LT distribution,HT power Distribution,EHT generation and transmission, Substation, Local power generators, transformers, Lightening arrestors,
The 4.1 States that earthing should be done as per IE rules 1956 with all amendments and direction of the local eclectic supply authority.
9. States about earth electrodes
20. About substation Earthing,
21. About Earthing of overhead power lines.
22.industrial premises
In short any person working in Electrical power Supply in Generation ,Transmission ,and Distribution must read ,study and keep a copy of IE rules 1956 and IS pertain to Earthing for the safety of the persons using electricity and those working in electricity and the safety of equipment. So buy borrow or steal as the old saying goes. ( Do not land in Jail by stealing or killing others by your ignorance.

What is the reason for needing more than one?

You should state the purpose .Is it general earth pit for body earthing or two pits for neutral grounding of transformers or generators .