What is a typical resistance value for a grounding electrode in a well-designed system?

In a well-designed grounding system, a typical resistance value for a grounding electrode is ideally less than 5 ohms. This low resistance ensures that the grounding system can effectively conduct fault currents and provide a safe path to ground during fault conditions. A resistance value of less than 5 ohms is often recommended to minimize the voltage drop across the grounding system, which helps reduce the risk of electric shock and equipment damage.

Maintaining a grounding resistance below this threshold enhances the overall effectiveness of the grounding system, ensuring that it meets safety standards and performs adequately under fault conditions. Proper grounding plays a vital role in protecting both people and equipment in electrical installations, which makes aiming for the lowest resistance possible essential in design and implementation.