What powers the Emergency Bus?

The Emergency Bus is normally powered by the EmerBus Feed Line. This system is designed to ensure that critical electrical components continue to function in the event of a primary power loss. The EmerBus Feed Line is typically connected to the aircraft’s emergency power systems, which include essential circuits and equipment that need to remain operational during a failure scenario.

The other choices might suggest alternative power sources, but they do not accurately describe the primary source of power for the Emergency Bus. For instance, while the Main Power Distribution may provide power to various systems during normal operations, it is not the primary source when considering emergency scenarios. Backup generators can contribute to powering systems, but they are not the sole or primary source for the Emergency Bus. Additionally, while the Standby Battery is designed to provide power in emergencies, it primarily supports specific systems rather than powering the entire Emergency Bus on its own under normal circumstances.