What must the continuity of the grounded conductor in multiwire branch circuits depend on?

The continuity of the grounded conductor in multiwire branch circuits must not depend on connections to receptacles because ensuring a reliable and uninterrupted path for the grounded conductor is critical for safety and proper operation of the electrical system. If the function of the grounded conductor relies on receptacles, any disconnection or fault at these points could lead to hazardous conditions, such as exposing users to potential electrical shock or equipment malfunction.

In multiwire branch circuits, the grounded conductor serves as a return path for current and a way to clear faults; therefore, its integrity is paramount. Designing the circuit such that its functioning does not hinge on receptacle connections helps maintain the reliability of the entire system. It ensures that the grounded conductor’s performance is consistent and predictable, independent of attachment points. This approach greatly enhances safety and compliance with electrical codes that emphasize grounded conductor continuity.