What feature relates to the emergency operation of elevator systems during a fire?

Fire Phase II operation is a critical feature related to the emergency protocols of elevator systems during a fire. This phase is specifically designed to enhance safety during fire emergencies by allowing firefighters to control the elevator system directly. When activated, Fire Phase II operation permits firefighters to override standard operations, maintaining control over the elevators to ensure they can be used safely to transport personnel to the fire scene or evacuate individuals.

By bypassing regular controls, Fire Phase II helps prevent the elevators from stopping at floors where there is smoke or fire, which could pose danger to passengers. Instead, it directs the elevator to a designated floor, typically the ground level, where it can be used safely. This ability is essential in emergency situations, as it can significantly aid in evacuation and access.

In contrast, relay activation generally pertains to the electrical control systems of elevators and does not specifically address safety during fires, while automatic speed reduction may refer to safety features under normal operations and not in the context of emergency response to a fire. Emergency lighting systems are also important for visibility during power outages but don’t directly impact elevator operation during a fire emergency.