What is the required testing interval for grounding systems after installation?

The correct answer indicates that grounding systems should be tested immediately after installation and then annually thereafter. This practice is critical in ensuring the ongoing safety and effectiveness of grounding systems in mining operations.

Testing immediately after installation verifies that the grounding system has been installed correctly and is functioning as intended. Subsequent annual testing is essential because it allows for the detection of any deterioration or changes in the grounding system that may occur over time due to environmental factors, wear and tear, or other operational changes.

Regular testing helps to ensure that grounding systems continue to protect personnel and equipment from electrical faults and provides a reliable path for fault current, thereby enhancing the overall safety of the mining environment. This annual schedule aligns with industry standards and best practices, ensuring that compliance with safety regulations is maintained over time.