When is it necessary for a guard to be used on a machine?

Using a guard on a machine is essential when operation exposes individuals to potential injury. This principle is based on occupational safety and health regulations, which aim to minimize hazards in the workplace. Guards serve as a protective barrier between the operator and the machine's moving parts, reducing the risk of accidents such as cuts, crushing injuries, or entanglement.

The need for guarding is primarily determined by the risks associated with the equipment's operation rather than its type or functionality, such as whether it is automatic, operates continuously, or has multiple moving parts. These factors may influence the severity of the risk but do not solely dictate the requirement for a guard. The fundamental rule is that whenever there is a risk of injury during the operation of a machine, guarding becomes a critical safety measure to protect workers and ensure a safer working environment.