What is the smallest conductor size permitted between Panel LC and the gutter without considering future motors?

The smallest conductor size permitted between a panel, such as Panel LC, and the gutter is determined by the electrical codes and standards that govern conductor sizing based on factors like load calculations, distance, and the type of application. When not factoring in future motor additions or future increases in load, the minimum conductor size is typically based on the maximum expected load current under normal operating conditions.

In this case, a conductor size of 300 kcmil is adequate for typical load requirements and ensures compliance with the National Electrical Code (NEC) or similar local regulations. This size also allows for ample capacity to handle the electrical load while maintaining performance and safety standards. Selecting a conductor size that is too small can lead to overheating, increased voltage drop, and potentially unsafe conditions. Therefore, 300 kcmil is justified as a balancing point - providing sufficient current-carrying capacity while allowing for a practical and code-compliant installation.