Before getting on top of the elevator, which switch should you actuate first?

The stop button is the first switch that should be actuated before getting on top of the elevator because its primary function is to halt the elevator's operation. This ensures that the elevator is not moving while maintenance or inspections are taking place, thus providing a safer work environment for the technician. Engaging the stop button effectively disables normal operation, preventing any accidental activation of the elevator controls during maintenance.

While the other switches have their own important functions—such as the inspection switch allowing controlled movement at a reduced speed, or the light switch illuminating the work area—the stop button is crucial for ensuring the immediate safety of personnel working on top of the elevator. The emergency switch is also important but is typically used in situations where immediate cessation of power is needed, not as a first step during routine maintenance procedures.