Sulah Safe Engineering30 Sept 2026
Back to All ArticlesA comprehensive technical breakdown on how to calculate ground electrode mesh dimensions, handle high soil resistivity, and ensure human safety against touch and step voltages.
<p>Earthing systems in industrial installations are often overlooked until a devastating transient fault or lightning surge occurs. According to Indian Standard <strong>IS: 3043 (Code of practice for earthing)</strong> and international standard <strong>IEC 62305</strong>, maintaining earth resistance below 1.0 Ohm (and below 0.5 Ohm for substations) is critical.</p>
<h3>1. Why Copper Bonded Rods Outperform Galvanized Iron</h3>
<p>Galvanized steel rods rely on a sacrificial zinc coating that typically wears off in acidic soil within 3-5 years. In contrast, copper bonded steel rods feature a 250-micron electrolytic copper coat that provides electrochemical protection for upwards of 30 years.</p>
<h3>2. Role of GEL Compound in Rocky Soils</h3>
<p>In regions with rocky strata or dry desert conditions, soil resistivity can exceed 500 Ohm-meters. Using advanced moisture-retaining chemical backfill compounds ensures the contact area around the electrode remains saturated with conductive ions.</p>
SS
Published by Sulah Safe Solution Engineering Cell
Engineers specializing in electrical grounding, IEC 62561 compliance, and turnkey surge protection across Gandhinagar & pan-India.