Yes, you can install earth electrode without backfill compound. As you are aware that earth resistance value depends on soil characteristics which vary from place to place with seasonal variation, the earth pit without backfill compounds may exhibit different resistance value at different places in different soil conditions.

To overcome these problems, use of mixture coal and salts are recommended by different national and international standards. The salts and moisture present in the earth pits reduce the soil resistivity and coal that absorbs and retain the moisture around the earth pipe, thus helps in maintaining low earth resistance value. Similarly, we also recommend and suggest the use of Back Fill Compounds inside the earth pit, instead of the conventional mixture of salt & coal as the use of Back Fill Compounds reduces the possibility of fast corrosion of earth pipe.

The Back Fill Compounds which is a mixture of eco-friendly minerals reduces the rate of corrosion of the earth electrodes.

The BFCs suggested by us has all the requisite quality that an ideal backfill compound should have. Nevertheless, you as per your requirement and understanding, are free to use any suitable backfill compounds that are available in the market in different name.