Coal and Salt in Earthing

Seawater is an excellent material for irrigating the immediate area of an earth pit so as to reduce earth loop impedance. In the absence of seawater, any other conductive fluid will do. Animal urine is one possibility.

Earthing/grounding and your name...what are you earthing building, machine, lots of machine, building grid, or lightning rod (or rods)...how much rainfall do you get, how deep is groundwater

How big is your pit? and especially how deep? Does it reach groundwater??

Specifications difficult to come by BUT if you are in a dry climate, groundwater is deep (>20m), and you have lots of sandy or limestone or sandstone you may need a shaft of about 200mm diameter down to the groundwater table backfilled with fine coal, coke, charcoal, or any other cheap conductor, yeh add some salt (5-10% by volume) to improve conductivity AND add a trickle of water (from any AC or other persistant sources of water)...salt water is OK BUT keep it DAMP ALWAYS.

TOM

Charcoal is porous and absorbs the salt water. It tends to keep the surrounding area conductive. In India there is a national code for earth pits that specifies the resistance of the earth pit as 4 ohms, if I remember right.

bioramani

The property of charcoal that is useful in this particular case is its conductivity, not its adsorbency.

In India charcoal is made in the traditional manner at a low temperature without graphitiization. This significantly increases the electrical resitivity. There is a sharp drop in reistivity of charcoal burnt at a high temperature especially ifcatalyzed with aluminum compounds.

Bioramani