In which BUS TIE switch position does the generator feed both generator and battery bus items?

In aviation systems, particularly in the context of generator and battery bus operations, the position of the BUS TIE switch plays a crucial role in how power is distributed throughout the aircraft's electrical system. When the BUS TIE switch is in the NORM position, it allows for normal operation where the generator is connected to both the generator bus and the battery bus. This configuration enables the generator to supply electrical power to all the bus items, ensuring that both the essential and non-essential systems receive the necessary power during flight.

In contrast, when the BUS TIE switch is in the OPEN position, it isolates the generator bus from the battery bus, preventing power from flowing between the two. The OFF position completely disconnects the generator from the electrical system, meaning no power is supplied to any bus items. The FAULT position indicates a failure mode where the system does not operate in the intended normal manner, which would also prevent the generator from feeding power to the bus items.

Therefore, the NORM position is the only configuration that facilitates the simultaneous feeding of power from the generator to both the generator and battery buses, making it the correct answer for this question.