In a multiwire branch circuit, how many conductors are needed for proper operation?

In a multiwire branch circuit, the correct number of conductors required is four. This configuration typically consists of two hot conductors, one neutral conductor, and one ground conductor.

The rationale for needing two hot conductors is that they can be connected to different phases of a power supply, allowing them to deliver a higher voltage supply to the connected devices. The inclusion of a neutral conductor is essential for providing a return path for current, ensuring that the circuit operates safely and effectively. The ground conductor is vital for safety, offering protection against electrical faults by providing a path for fault current to flow safely to the ground.

This setup not only enhances the circuit's capacity but also maintains balance in the load distribution. When properly implemented, a multiwire branch circuit using four conductors can improve energy efficiency and compliance with electrical codes, emphasizing safety in electrical systems.