Which secondary conductor to the panel carries the most current?

The correct selection identifies AØ as the secondary conductor that carries the most current. In three-phase systems, which involve AØ, BØ, and CØ, these conductors correspond to the three phases of electrical distribution. Normally, AØ is designed to manage a significant amount of the load, particularly in balanced systems where the current is distributed evenly across all three phases.

The total current capacity of each phase can depend on how the loads are connected. If the load on AØ is heavier or less balanced compared to BØ and CØ, it will carry more current. Proper conductor sizing is crucial, as it ensures that the conductor can handle the expected load without leading to overheating or other safety issues.

In practical scenarios, it's essential to monitor current levels in each phase, as the phase with the highest current might also impact the performance of the electrical system overall, leading to a potential for overheating or equipment failure if not managed properly.