How made to GI earth-pit with salt and coal?

1. Materials needed: (1.25 m) copper road , salt and coal .

2. How to make to GI earth pit :

a. Dig a hall in the dirt ground at least for 1m depth.

b. Install a PVC pipe of 1m length and 10 cm width inside this pit.

c. Install the copper road in the middle of the PVC pipe and start to make layers

of 10 cm in sequence of salt once and coal till the PVC pipe is filled you must

keep the road tip over the ground at least for 10 cm so you could get

connection to your ground system.

d. When you get done of the mix layers of the salt and coal.. you need to take

the PVC pipe off to get contact between the system and the ground.

e. You could joint the end tip of the copper road to the facility earth system.

And then you will get a good earthing system .. for large facilities with high load consuming power you could make 3 pits the same way with 3 copper roads joint them as triangle by a copper cable and use any one of the 3 points as earth main point for the system ..

Hope I could Help somebody with this ..

Electric Eng. Hussein K. Hasson

Baghdad , Iraq