The feeder conductor ampacity must be equal to or greater than the service-entrance conductors for loads with an ampacity of how many amperes or less?

The correct answer indicates that the feeder conductor ampacity must be equal to or greater than that of the service-entrance conductors for loads of 55 amperes or less. This requirement is encapsulated in the National Electrical Code (NEC), which outlines guidelines for safe electrical installations and helps ensure that conductors are appropriately rated for the loads they will carry.

When designing an electrical system, it is crucial that the feeder conductors have adequate ampacity to handle the expected load to prevent overheating, voltage drop, and other issues. For loads that are 55 amperes or less, the NEC stipulates that the feeder must match the service-entrance conductors' ampacity to ensure safe operation.

This provision is especially relevant in installations where the load might approach the rated capacity of the conductors. Having a feeder conductor with sufficient capacity in relation to the service-entrance conductors helps maintain system integrity and safety.

Understanding this requirement is essential for electrical professionals to ensure compliance with codes and to minimize the risk of electrical failures.