For a motor operating at 208-230/460 V with a supply from a 120/240-V panel, the minimum circuit conductor size is ___ AWG.

To determine the minimum circuit conductor size for a motor operating at 208-230/460 V fed from a 120/240-V panel, we need to consider the voltage, motor type, and the current that the motor will draw. The National Electrical Code (NEC) provides guidelines for sizing conductors based on the motor's full load current rating and the voltage being used.

In this case, the motor operates at a higher voltage than the supply voltage. When dealing with a three-phase motor at 208-230 V, the full load ampacity will generally reference the NEC tables for conductor sizing. The actual size of wire needed depends on the amperage the motor will draw during operation.

The 10 AWG conductor you indicated is typically suitable for smaller motors drawing less current. However, for motors that operate significantly above this rating, we would need to size up to ensure the wire can carry the required ampacity while minimizing voltage drop and heat generation.

For a motor circuit and considering safety factors like derating and the ambient temperature, a conductor size of 10 AWG may be the minimum acceptable for smaller motors but could be inadequate for larger ones especially under different installation conditions. Thicker conductors such as 6 AWG or