In a wye wired system, how do the line current and the phase current compare?

In a wye wired system, the relationship between line current and phase current is characterized by their equality. This means that the current flowing through each line conductor, known as line current, is the same as the current flowing through each phase winding, referred to as phase current.

This equality arises from the configuration of a wye connection, where each phase is connected to a common neutral point. In a balanced three-phase system, the total current entering the system from the line conductors is distributed equally among the three phases. As a result, each line carries the same amount of current as the corresponding phase winding it is connected to, confirming that line current and phase current are equal.

In contrast, choices suggesting differences between line current and phase current do not hold true for a balanced wye configuration. Therefore, the understanding of this relationship is fundamental in electrical circuit analysis and system design, particularly in the field of three-phase systems.