What size PVC pipe for 3 4o aluminum XHHW wire?

For three 4/0 aluminum XHHW wires, you typically need a minimum of 2-inch diameter PVC conduit to ensure adequate space for installation and heat dissipation. According to NEC (National Electrical Code) guidelines, this size allows for proper fill while adhering to the requirements for wire bending and accessibility. Always check local codes and regulations, as they may have specific requirements.