What must be done before installing personal protective grounds on a circuit?

Before installing personal protective grounds on a circuit, it is essential that the circuit must be de-energized and tested for the absence of nominal voltage. This step is crucial to ensure the safety of the personnel working on or near the electrical system. When a circuit is energized, there is a significant risk of electrical shock or arc flash, which can cause serious injuries or fatalities.

De-energizing the circuit eliminates the risk of electrical energy being present. Testing for the absence of nominal voltage serves to confirm that no voltage is present in the circuit and that it is safe to work on. This testing must be performed using appropriate voltage testing equipment to ensure accuracy. Only after these critical safety checks are completed can personal protective grounds be effectively and safely installed, providing a secondary path for electricity in the event of a fault.

This procedure is a fundamental rule in electrical safety practices, emphasizing the importance of verifying the status of the circuit before any maintenance or installation work begins.