What is the function of the Power Junction Box (PJB)?

The Power Junction Box (PJB) plays a critical role in the electrical system of the aircraft by distributing power from the generators to various electrical loads throughout the aircraft. It serves as a central hub, connecting the aircraft’s power generation systems (both the main and auxiliary generators) to the various components that require electrical power, such as avionics, lighting, and other vital systems.

In essence, the PJB ensures that electrical power is effectively managed and routed to where it is needed most, thereby supporting the overall functionality of the aircraft. This distribution is essential for maintaining operational integrity during flight, as it helps prevent overload and ensures that critical systems receive a steady power supply. This makes option B the correct answer, as it accurately describes the primary function of the Power Junction Box.