What initial action must be taken before operating or verifying a hand-operated switch?

The initial action that must be taken before operating or verifying a hand-operated switch is to perform a job briefing before work begins. This action is crucial as it ensures that all personnel involved in the task are on the same page regarding the procedures, safety protocols, and potential hazards associated with the switch operation. A job briefing allows for the discussion of roles and responsibilities, which enhances coordination and safety during the operation.

While confirming the switch alignment, checking for equipment fouling the switch, and notifying the engineer are all important steps to consider, they follow the job briefing. The briefing lays the groundwork for all subsequent actions by ensuring that everyone understands the process and is prepared for the operation, thereby minimizing risks associated with operating hand switches.