Earthing Copper Electrodes

Earthing plays a vital role in all electrical systems. 


A proper earthing system is most vital to safeguard life and sensitive equipments. Features of ideal earthing:

  • Low electrical resistance to earth.
  • Good Corrosion resistance.
  • Ability to carry high currents repeatedly.
  • A reliable life of at least 30 years.


Soil Conditions
Achieving a good earth will depend on local soil conditions. A low soil resistivity is the main Aim. The factor affecting the resistivity are :

  • Moisture content of the soil
  • Chemical composition of the soil e.g. Salt content.
  • Temperature of the soil.


The moisture content in the soil decreases the resistivity of the soil. Similarly, increase in the salt content reduces the resistivity, while reduction in temperature of the soil increases the resistivity.

As per IS 3043: 1987, one can achieve lower resistivity at depths at greater depths. Often these levels are some meters below the surface. The most economical way of reaching them is by Deep Driven Earth Rod Electrodes. When deep driving is not possible mainly due to rocks, underneath, parallel driven shorter rods, plates, mates or buried conductors or a combination of three can be used.

Earth Rod Electrodes
Earth rods are commonly made from solid copper or stainless steel with copper bonding. Copper Bonded Earthing Rods or Copper Bonded Grounding Rods are commonly used due to strength, corrosion resistance and comparatively low cost. Earth Rod

Copper Bonded Earth Rod System

This system includes rod along with accessories.

  • Driving Stud : These are made from steel & suitable for use with Power Hammers.
  • Coupling : These are made from copper alloy & counter bored to enclose threads. Coupling is high strength & also highly corrosion resistant. These are used to connect driving stud to rod or rod to rod.
  • Rod : Steel rod with core of low carbon provides tensile strength at least of 600 N/mm2. These rods are molecularly bonded with 99.9 % pure electrolytic copper up to thickness of 0.25mm, Rolled threads at each end gives strength than cut threads.
  • Clamp : These are made from high copper content alloy strong resistance to corrosion.