Earth Strip Size Calculation

Try opening your textbooks!

We will help most people but those that are to idle to help themselves usually get short shrift.

I did look at your previous post before writing this.

Since you give no indication where you are, and your other questions indicate a lack of knowledge of electrical systems, I'd suggest a short course in electronics.

If British Standard suggested by PW Slack isn't applicable, maybe the NEC (National Electrical Code) will work for you.

You can also search for the NUMEROUS web sites that can do this for you.

I'd suggest searching here: Search GlobalSpec for possible solutions.

I'd also suggest that you use a search engine BEFORE you come here, so that you will have enough knowledge of the subject to ask relevant questions if you need real help.

It also depends on local and international standards, some (for example) require 100% redundancy (by adding a second earth conductor/busbar, etc of the same size) for certain transformer applications.

Have you tried an internet search?

Please refer to IS 3043.