What is the amperage for 4/0 AAAC?

The correct amperage for 4/0 AAAC (All Aluminum Alloy Conductor) is indeed 348 amps. This rating is based on standard ampacity tables that consider various factors including the conductor size, material, and the ambient temperature. The 4/0 AAAC is often used in applications such as overhead power transmission, where its conductivity and strength make it suitable for high-load scenarios.

In determining the ampacity, considerations are typically made for the type of insulation, the installation method (like whether the conductors are in free air, underground, etc.), and the maximum ambient temperature expected. The value of 348 amps indicates a safe current-carrying capacity under standard conditions, ensuring that the conductor can handle the load without exceeding its thermal limits.

The other provided amperage values do not match the established standards for 4/0 AAAC, reflecting either lower capacity due to conductor size variations or differences in the material composition which influences performance under load.