Earthing & Grounding Systems
Importers in Comilla

Coastal, humid and high-chloride sites should specify copper-bonded rod at 450 microns minimum or solid copper, with stainless steel or copper couplings. Never carbon steel; it creates a galvanic cell at the joint. Desert sites with low chloride but high resistivity soil often do well with GI pipe electrodes and a bentonite backfill compound to bring resistance down.

Backfill compound, bentonite or a conductive carbon-based mix, gets packed around the electrode to lower the effective soil resistivity and keep it stable across seasons. It matters most in high-resistivity or sandy, rocky soil where the natural ground alone won't reach the target resistance. In low-resistivity, consistently moist soil it's less critical, though it still helps long-term stability.

It comes down entirely to soil resistivity and the target resistance you're designing to, often 1 ohm for data centres and generating stations, 2 ohms for major substations, per IS 3043. A single rod in 100 ohm-m soil delivers roughly 25 to 30 ohms on its own, so reaching 1 ohm usually needs a buried counterpoise grid: a perimeter ring of strip with rods spaced along it, sized from an actual soil resistivity survey using the Wenner 4-pin method, not a rule of thumb.

Yes, we supply strip cut to drawing length with bolt holes drilled, bends pre-formed to the layout drawing, and bar-coded project tags attached for site sorting. This is standard on EPC contracts in Saudi Arabia, UAE and EU sites where on-site cutting and drilling is not permitted by the contractor's HSE rules or where labour cost makes prefabrication clearly worthwhile. Drawings can be received in DWG, DXF or PDF. We turn around first-batch dispatch in 2–3 weeks from drawing approval.