According to the NEC®, feeder and service-entrance conductors should have the neutral load determined by which section?

The determination of the neutral load for feeder and service-entrance conductors is guided by the NEC® in section 220.61. This section specifically addresses the calculation of neutral conductors in three-phase systems, as well as single-phase systems where loads can be balanced.

Understanding this section is crucial, as it helps in accurately sizing the neutral conductor based on the actual load that it needs to carry. In scenarios where the load is unbalanced, section 220.61 provides formulas and guidelines to ensure that the neutral conductor is appropriately sized to handle the expected neutral current. This consideration is particularly important for safety and efficiency in electrical installations.

The other sections mentioned do pertain to various methods of load calculations, but they do not specifically focus on the neutral load required for feeders and service entrance conductors.