When is it not permitted to stand in a red zone?

Standing in a red zone is prohibited primarily for safety reasons, particularly when there is an imminent risk related to moving parts or equipment. In this case, the scenario described where the door of a machine is open and the drum is rotating signifies a high hazard. The open door indicates that the machine is in a state where operators may inadvertently be exposed to moving parts, which could lead to serious injury.

In a red zone, the intention is to keep personnel safe from potential dangers associated with equipment operation. If the drum of a machine is rotating, any presence of personnel in that area poses an immediate risk of contact with moving machinery, creating a dangerous situational environment. Therefore, standing in that specific context is strictly not allowed to prevent accidents and ensure worker safety.

Other scenarios where standing in a red zone may be considered are typically less hazardous, such as during breaks or when doing routine maintenance that does not involve active machine operation.