Earthing Electrode No. Calculation

Have you Googled it??

After making the original post, I Googled your question and got About 2,310,000 results (0.43 seconds)

Try it sometime.

An internet search is the best thing for this as it also teaches you at the same time and gives you application specific details, de-ratings, etc that a program may expect you to know and take into account.

A software package (free or not) is just a tool, and if you don't know what you are doing you won't know if the answer you get from it is right.

Additionally I am not aware of any free programs that will do this (perhaps you can find one using an internet search and let us know).

Check this topic

Earthing Systems and its Calculation with design

Most souls just continue to add electrodes and conductive materials until the requirement is attained.

Seawater is a good material to get the earthing resistance down, and, according to reports, so it cow urine - calculate that!

I have an excel program-I did not use it so I don't know if it is accurate and I don't know how to insert it here.

Try this link:

http://he.scribd.com/doc/131736342/Earthing-IEEE80-Final-xls