What procedure can help prevent electrical shock while working on circuits?

Ensuring circuits are grounded and de-energized is an essential safety procedure for preventing electrical shock while working on circuits. Grounding provides a safe path for electric current to flow in case of a fault, significantly reducing the risk of shock. De-energizing circuits means that they are completely shut off and not live during maintenance or repair work, creating a safe environment for the electrician. This procedure is a standard safety practice and aligns with regulatory guidelines, such as those from the National Electrical Code (NEC) and the Occupational Safety and Health Administration (OSHA), which emphasize the importance of working with circuits that are not energized.

While other practices, such as using hand tools, having a partner present, and wearing protective clothing, contribute to overall safety in different contexts, they do not alone ensure that an electrician is protected from the risk of electrical shock as effectively as properly grounding and de-energizing circuits.