The fall-of-potential method is used to measure what aspect of electrical systems?

The fall-of-potential method is specifically utilized to measure earth resistance, which is a critical aspect of grounding systems in electrical installations. This method involves testing the resistance of the grounding electrode system to the earth by measuring the voltage drop across a known resistance while injecting a test current into the ground.

In the fall-of-potential test, electrodes are placed at a distance from the grounding electrode under test, and measurements are made to determine the voltage drop to establish the resistive path between the ground and the electrode. The resulting data is essential for ensuring that the grounding system is effective and meets safety and regulatory standards, helping to protect equipment and personnel.

Understanding earth resistance is vital for achieving proper grounding since high resistance can lead to ineffective grounding, posing risks during fault conditions. Therefore, the fall-of-potential method is directly linked to assessing the integrity and effectiveness of grounding systems in electrical infrastructure.