What is the minimum size circuit conductor required for Motor #2 using Figure 230.271?

The correct choice of 8 AWG as the minimum size circuit conductor required for Motor #2 is based on the specific electrical characteristics and requirements outlined in Figure 230.271. In many electrical codes, including the National Electrical Code (NEC), the sizing of conductors for motor circuits is determined by factors such as the full-load current of the motor, the length of the conductor run, and the permissible voltage drop.

When evaluating conductor sizes for motors, it's essential to consider the full-load current ratings specified for different motor types. The NEC provides tables that correlate the full-load current of a motor to the corresponding conductor gauge necessary to ensure safe operation without overheating.

In this case, if Figure 230.271 indicates that the full-load current of Motor #2 falls within a range that specifically requires an 8 AWG conductor to safely handle the expected current, then this size is deemed necessary to prevent overheating and ensure efficient operation. Additionally, factors such as temperature ratings of the conductors and installation conditions may further dictate the size chosen.

Using a smaller conductor, such as 10 AWG or 12 AWG, may not provide adequate current-carrying capacity, leading to potential safety hazards. Therefore, the decision to select 8