earthing requirement for residential building

[Mahesh1280]

Hi
We have a g+2 house. G is 2 bhk and first and second are 3bhk houses. We also have a provision for lift.
I heard from my contractor that we will need 4 6ft pits for
Earthing and each will cost 8 to 10k. I found it hard to believe. I am sure many of you will have similar size houses could you please guide me in this matter? Will we need 4 pits for earthing?? Also can we go for GI wire for earthing instead of copper? What are pros and cons?
Please let me know asap.

Thanks in advance

[sk1976]

You need seperate earthing per electrical meter. So you may need 4 pits if you plan to install 4 meters. And earthing is a MUST for safety reasons.

Now coming to the cost: earthing work involves

- digging small pits of around 6ft to 8ft depth and 6" to 9" dia. There are specialized labourers who do this work and charge around Rs 500/pit
- You will need copper plate, GI pipes, copper bolt/nuts and copper wire till the meter panel board.
- You need salt, charcoal , sand/mud to fillup the pit in layers
- Electrical labour to do this

You may need to spend around 3-4 k / earthing if you handle yourself.

[tech4pk]

one earthing should not be costing more than 3k. Also, I dont think that you need to have 6ft pit, 4ft should be fine. But, it's important to have earthing for each incoming unit.