In electrical grounding systems, the proper earthing rod is crucial for long-term performance, safety, and cost-effectiveness. The two most widely used types of earthing rods are Copper Bonded Rods and GI (Galvanized Iron) Rods. Though GI rods continue to be used in most locations because of their lower upfront expense, copper bonded earthing rods provide much better performance in almost all areas. This blog discusses why copper bonded rods are the preferred choice for today's grounding systems.
What Are GI Rods and Copper Bonded Rods?
GI Rods are manufactured by applying a zinc coat over mild steel (galvanization). This gives them some corrosion resistance.
Copper Bonded Rods, however, are manufactured by bonding a heavy layer of 99.9% pure copper over a steel core in an electrolytic process. This creates a long-lasting and extremely conductive rod.
Key Differences and Benefits of Copper Bonded Rods
✅ 1. Resistance to Corrosion
GI Rods: Zinc coating is worn away gradually, particularly in acidic or salt soils. This leaves the core exposed to rust and diminishes effectiveness.
Copper Bonded Rods: Copper is inherently corrosion-resistant and develops a long-lasting protective layer. These rods are suitable for all soil conditions, even highly corrosive ones.
✅ 2. Electrical Conductivity
GI Rods: Zinc has low conductivity when compared to copper.
Copper Bonded Rods: The copper coating provides high conductivity, enabling quicker and safer dissipation of fault currents and lightning surges.
✅ 3. Lifespan
GI Rods: Generally last 3–5 years based on soil condition.
Copper Bonded Rods: Can last 15–30 years or more, making them ideal for long-term installations.
✅ 4. Standards and Certifications
GI Rods: Usually not certified for critical infrastructure.
Copper Bonded Rods: Available with ISI, UL, and IEEE certifications, suitable for high-standard applications like data centers and substations.
✅ 5. Maintenance and Replacement Cost
GI Rods: Require more frequent replacement and maintenance.
Copper Bonded Rods: Minimal maintenance and less replacement requirements, which saves money in the long term.
Applications
Due to their reliability and longevity, copper bonded rods find wide applications in:
Industrial plants
Telecommunication towers
Power substations
Solar and wind farms
Commercial and residential buildings
Conclusion
Although GI rods might appear cost-effective at first sight, they tend to lack long-term reliability and performance in extreme conditions. Copper bonded earthing rod not only provide better corrosion resistance and conductivity but also guarantee safety, durability, and international standards compliance.
For optimal use, select ISI-approved copper bonded rods from a reputed manufacturer. High-quality ground devices that exceed global safety levels are available in Pioneer Power International products, thus guaranteeing steady protection for any of your electric systems.