In multiwire branch circuits, which conductor's continuity should not rely on device connections?

In multiwire branch circuits, the continuity of the grounded conductor, commonly referred to as the neutral, should not rely on device connections. This is because the neutral conductor must maintain a continuous path back to the power source for the proper functioning of the circuit and to ensure safety.

If the continuity of the neutral depends on device connections, any disconnection at a device could result in an open neutral, which can lead to dangerous situations, such as overvoltage conditions on equipment. Additionally, proper grounding is crucial for safety, and the grounding system is designed to protect against electrical faults; thus, it should not serve as a substitute for a dependable neutral path.

The importance of maintaining a continuous neutral path, independent of device connections, helps ensure that multiwire circuits operate safely and effectively while also complying with the NEC's requirements for reliable electrical distribution. This focus on maintaining integrity in the neutral path aligns with the overall goal of the NEC in promoting electrical safety and performance standards.