Where R = resistance, ohms ρ = soil resistivity, in ohm meters L = buried length of grounding electrode, in meters d = diameter of grounding electrode, in meters Note: Equation is commonly referred to as the ‘modified Dwight formula.’Ģ. Single vertical rod length L and diameter d meters, top of rod level with surface: The formulae enlisted below, extracted from AS1768, are two most commonly used.ġ. The ground resistance can either be calculated using empirical formulae, by using nomograms or by the use of software.Įxamples of formulae that are available for use are contained in AS1768 Lightning Protection Standard, Appendix C. Calculating On Ground Electrode Resistance Of A Single RodĬalculating On Ground Electrode Resistance Of A Single Rod.
Earthing calculation full#
This following is part one of our four-part ground electrode design principles and testing series, which is based on our white paper “Ground Electrode Design Principles and Testing.” You can download the full white paper here. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.Understanding calculating ground electrode resistance of a single rod and its relation to ground electrode system design is key to understanding the fundamental principles of design, ground resistance and soil resistivity measurements and computations.
He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. Membership No:F-1264873 ,M-1473586.He has more than 19 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is FIE ,MIE and CEng from Institution of Engineers,India. Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics. Membership No:M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is member of Institution of Engineers (MIE) and CEng,India. About Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)
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