Which three circuit types are required for an elevator group recall and warning system?

Which three circuit types are required for an elevator group recall and warning system?

• A. Recall to designated level only
• B. Recall to designated level and elevator warning
• C. Designated level recall, alternate level recall, elevator warning signal
• D. Elevator recall, door release, and fire alarm

Answer: (C)

The essential idea is to ensure elevators used in an emergency are directed to a safe location, even if the primary option isn’t available, while clearly signaling occupants and responders about the recall status. That’s why the three circuit types are designated level recall, alternate level recall, and elevator warning signal. Designated level recall automatically sends the group to a preselected floor that’s considered safe or accessible during an emergency, providing a predictable landing and facilitating evacuation or firefighter access. If that floor becomes unavailable or unsafe, the system can switch to an alternate level recall, giving a backup destination so the group isn’t left without a safe option. The elevator warning signal then provides clear audible and visual alerts that recall is in progress and that the elevator should not be used, helping to prevent accidental calls and to coordinate response efforts. Other options omit one of these critical elements or mix in functions that aren’t part of the standard trio for group recall and warning. For example, recalling only to the designated level leaves no fallback if that level is unsafe, and including door release or fire alarm alone doesn’t address the need for an alternate recall destination or a dedicated elevator warning signal.

The essential idea is to ensure elevators used in an emergency are directed to a safe location, even if the primary option isn’t available, while clearly signaling occupants and responders about the recall status. That’s why the three circuit types are designated level recall, alternate level recall, and elevator warning signal. Designated level recall automatically sends the group to a preselected floor that’s considered safe or accessible during an emergency, providing a predictable landing and facilitating evacuation or firefighter access. If that floor becomes unavailable or unsafe, the system can switch to an alternate level recall, giving a backup destination so the group isn’t left without a safe option. The elevator warning signal then provides clear audible and visual alerts that recall is in progress and that the elevator should not be used, helping to prevent accidental calls and to coordinate response efforts.

Other options omit one of these critical elements or mix in functions that aren’t part of the standard trio for group recall and warning. For example, recalling only to the designated level leaves no fallback if that level is unsafe, and including door release or fire alarm alone doesn’t address the need for an alternate recall destination or a dedicated elevator warning signal.