Traditional type made from gray iron.
Strong, brittle, and corrosion-resistant.
Length: 2 mtrs to 3 mtrs
Diameter: 50 mm to 150 mm.
Thickness: 3 mm to 5 mm (or more).
Often coated with bitumen, paint, or galvanization to protect from rust.
The pipe is placed vertically in the ground, surrounded by non corrosive higroscopic back fill earthing compound
Leakage current flows from electrical installation → into the cast iron pipe → dissipates safely into the soil.
Strong and durable compared to GI (galvanized iron) pipes.
Suitable for high current earthing systems (transformers, DG sets, industries).
Heavier than GI or copper pipes.
In highly corrosive soil (acidic/alkaline), copper electrodes perform better.
