What precaution should be followed when shutting down machinery for maintenance?

De-energizing any power sources is crucial when shutting down machinery for maintenance because it ensures that all electrical and mechanical forces are safely disabled. This precaution minimizes the risk of accidental startups or electrical shocks, which could injure maintenance personnel. By completely isolating the machinery from its power sources, technicians can work confidently, knowing that the risk associated with stored energy in capacitors, hydraulic systems, or pneumatic systems is significantly reduced.

While removing personnel from the area can enhance safety, it does not address the specific risks associated with live power sources. Using manual controls to operate machinery and maximizing machine efficiency do not relate to the shutdown process and could potentially lead to unsafe conditions if power remains connected. Ensuring that equipment is properly de-energized is a fundamental safety measure in maintenance protocols to protect workers and ensure a safe work environment.