What is the function of an external power receptacle on the ERJ-145?

What is the function of an external power receptacle on the ERJ-145?

• A. To recharge the battery only.
• B. To start the engines automatically.
• C. To supply AC power from a ground power source for ground operations and preflight activities, reducing battery use.
• D. To provide DC power to essential bus.

Answer: (C)

On the ERJ-145, the external power receptacle provides AC power from a ground power unit to the aircraft while it’s on the ground. This powers systems such as avionics, lighting, and air conditioning for ground operations and preflight checks without drawing from the battery or running the APU. It isn’t meant to start engines automatically, and it isn’t a DC power source for the essential bus—the external receptacle supplies AC power, with DC power handled by other sources or conversions as needed. In short, it delivers ground-based AC power to support ground operations and preflight activities while conserving battery use.

On the ERJ-145, the external power receptacle provides AC power from a ground power unit to the aircraft while it’s on the ground. This powers systems such as avionics, lighting, and air conditioning for ground operations and preflight checks without drawing from the battery or running the APU. It isn’t meant to start engines automatically, and it isn’t a DC power source for the essential bus—the external receptacle supplies AC power, with DC power handled by other sources or conversions as needed. In short, it delivers ground-based AC power to support ground operations and preflight activities while conserving battery use.