Why Copper Bonded Earthing Rods are Essential for Electrical Safety What are Copper Bonded Earthing Rods? Copper Bonded Earthing rods or Copper Bonded Earth Rods are a type of grounding electrodes that are used in earthing systems. These rods have a steel core with a coating of copper which is applied to it using an electrolytic process. This coating of copper increases the conductivity of the rods and makes them resistant to corrosion. Copper Bonded Rods are used in various types of industries like Electrical distribution, Telecommunications, Industrial applications, Substations, and Factories and are of various types used for various purposes. Some of them are: Types of Copper Rod for Grounding with Sizes Copper Bonded Earth Rod- External Threaded Sr. No. Rod Diameter in mm Total Length Thread Diameter 1 12.5 1200 9/16″ 2 12.5 4200 9/16″ 3 12.5 1500 9/16″ 4 12.5 1800 9/16″ 5 12.5 2400 9/16″ 6 12.5 3000 9/16″ 7 14.2 1200 5/8″ 8 14.2 1500 5/8″ 9 14.2 1800 5/8″ 10 14.2