When should warning signals be used in relation to machinery operations?

The use of warning signals at the start and during machinery operations is essential for ensuring the safety of all personnel involved. These signals serve as proactive measures to alert workers of ongoing activities and potential hazards associated with machinery. By implementing warning signals at these times, operators can communicate critical information effectively to nearby personnel, warning them about movements, operational changes, or risks associated with the machinery, thereby minimizing the chance of accidents.

Using warning signals only during emergencies or maintenance does not provide ongoing protection throughout the operation of the machinery, while the option of only when personnel are near the machinery may not consider all scenarios where a warning is beneficial. In contexts where machinery is in operation, consistent signaling helps create a safer work environment by maintaining awareness and vigilance among all workers present.