In multiwire branch circuits, what must be done with the neutral conductor to maintain code compliance?

• A. It must be isolated from other circuits.
• B. It must be insulated to prevent touching other wires.
• C. It must be properly terminated, with a tied breaker or handle-tie.
• D. It can be connected to ground.

Answer: (C)

In a multiwire branch circuit, two hot conductors share a single neutral, so both hot legs must be disconnected at the same time for safe servicing. This is achieved by using a tied breaker or a common-trip (two-pole) breaker, which ensures both ungrounded conductors trip together. Proper termination means the neutral stays within the protected circuit and follows the rule that neutral and grounding are bonded only at the service equipment, not at branch points. This setup prevents a hazardous situation where one hot leg is opened while the other remains energized, which could energize the neutral or create a shock risk. Connecting the neutral to ground elsewhere is not allowed in branch circuits, and simply isolating or insulating the neutral does not address the safety requirement.