What is the maximum amps allowed for external ground power for 2 minutes?

The maximum allowable external ground power for a duration of 2 minutes is set at 500 amps. This specification is critical because it ensures that while the aircraft is connected to external power, the supply remains within safe operational parameters. Exceeding this limit could potentially damage the aircraft's electrical systems or create safety hazards.

The reason 500 amps is the designated limit relates to the aircraft's electrical design and load management requirements, ensuring that avionics and powered systems receive adequate power without the risk of overload. Additionally, the temporary nature of this power usage (limited to 2 minutes) allows for initial power draw needs while still maintaining safety standards.

Understanding these parameters is essential for ground crew and pilots alike to ensure the safety and longevity of the aircraft's systems during ground operations.