This method is an established field measurement used to evaluate the effectiveness of grounding systems. The process involves injecting a test current into the ground and measuring the resulting voltage gradient to determine the resistance between a grounding electrode and remote earth. A high resistance reading indicates a poorly performing grounding system, potentially leading to safety hazards or equipment malfunctions. For example, in electrical substations, this measurement confirms that the grounding grid provides adequate protection against fault currents.
The implementation of this technique is crucial for ensuring safety and reliability in electrical installations. A properly functioning grounding system dissipates fault currents, preventing dangerous voltage build-up and minimizing the risk of electric shock. Historically, this assessment method has evolved from simple resistance measurements to more sophisticated techniques accounting for soil resistivity and electrode geometry. Its consistent application provides a foundation for adherence to safety standards and optimal system performance.