Improving Earthing

EARTH PIT CONSTRUCTION AS PER INDIAN ELECTRICITY BOARD
1. Excavation on earth for a normal earth Pit size is 1.5M X 1.5M X 3.0 M
2. Use 500 mm X 500 mm X 10 mm GI Plate (Plate may be use as big as possible to contact more and more area of Earth for low resistance & best result)
3. Make a mixture of Wood Coal Powder Salt & Sand all in equal part
(a) Wood Coal Powder use as good conductor of electricity, anti corrosive, rust prove for GI Plate for long life.
(b) Salt use as electrolyte to form conductivity between GI Plate Coal and Earth with humidity
(c) Sand has used to form porosity to cycle water & humidity around the mixture
4. Put GI Plate (EARTH PLATE) of size 500 mm X 500 mm X 10 mm in the mid of mixture
5. Use Double GI Strip size 30 mm X 10 mm to connect GI Plate to System Earthling
6. It will be better to use GI Pipe of size 2.5" diameter with a Flange on the top of GI Pipe to cover GI Strip from EARTH PLATE to Top Flange
7. Cover Top of GI pipe with a T joint to avoid jamming of pipe with dust & mud and also use water time to time through this pipe to bottom of earth plate
8. Maintain less than one Ohm Resistance from EARTH PIT conductor to a distance of 15 Meters around the EARTH PIT with an other conductor dip on the Earth at least 500 mm deep.
9. Check Voltage between EARTH PIT conductor to Neutral of Mains Supply 220V AC 50 Hz it should be less than 2.0 Volts
Read more: http://wiki.answers.com/Q/How_do_you_make_a_electrical_earth_pit#ixzz1JnIzSOdA

The back-fill material used in all chemical earthing is a natual clay (formed out of valcanic eruption) called BENTONITE - with varying degrees of a wide variety of additives - like Sodium Chloride, Copper Sulphate, Calcium Chloride, Magnesium Sulphate, etc.

There is nothing so special in this chemical to increase 'conductivity' per se. Bentonite has a wonderful property of retaining moisture. With mositure and the additive salts present, the area around the earth electrode is actively conductive 'electrolytically' and that is the magic.

The procedure for good chemical earthing is to create a basin of size. say, 2 feet diameter, around the earth electrode and fill this chemical tightly in the basin. Or easy way is to go for commercially available safe earth electrodes, which come pre-filled with this chemical.