All generator power is distributed through which components?

• A. Three main buses
• B. One main bus
• C. Two main buses
• D. Four main buses

Answer: (C)

Power in the Beechjet 400A is routed through two primary distribution paths, the two main buses. Generator power is fed into these two main buses and then sent out to the vast majority of aircraft systems through feeders. This two-bus design provides redundancy and allows load sharing between sources—if one bus or its source drops, the other can continue to power essential loads via the bus tie. A single bus would lack the necessary redundancy, and more than two main buses aren’t part of this aircraft’s typical electrical architecture, which is why two main buses is the correct description.