When power is cut to elevators, what protocol should be followed?

Leaving a member at the shutoff switch is a critical step when power is cut to elevators. This action ensures that someone is present to manage the situation effectively, as elevators can pose safety risks if they are not monitored. The individual stationed at the shutoff switch can quickly react to any unexpected movements of the elevator and ensure it remains safe while handling the power disruption. They can also communicate with others about the situation, further enhancing the safety of all individuals involved.

Moreover, this approach allows for a methodical and coordinated effort to manage the elevator system during an emergency or power loss, ensuring that all safety protocols are adhered to while other actions can be taken by team members. The other options might be less effective in ensuring safety and managing the situation appropriately. For instance, ensuring all members exit the elevator doesn't address the need for monitoring and control, activating the backup generator may not be feasible without first assessing the situation, and closing all doors doesn't directly address the need for safety management during power outages.