To avoid overloading, branch-circuit conductors should serve what size load?

The correct choice, which is to serve the maximum load, is crucial in ensuring the safety and reliability of electrical systems. Branch-circuit conductors are designed to carry current up to a specified capacity without overheating or causing damage. If the conductors are sized to only accommodate the minimum or average load, this can lead to issues such as overloading when the actual load exceeds these values.

By serving the maximum load, the conductors are appropriately rated to handle the highest expected current demand. This practice helps to prevent overheating, reduces the risk of fire hazards, and ensures that the system operates efficiently under peak usage conditions. Incorporating this principle also aligns with safety standards and codes, which aim to protect electrical systems from potential failures due to excessive loads.

In practical terms, sizing conductors for the maximum load means that even in cases of fluctuating energy demand or unexpected surges, the conductors will still function safely without being subjected to excessive stress. This approach not only promotes longer lifespan for the equipment but also enhances the overall reliability of the electrical system.