A multiwire circuit must consist of conductors connected to what?

A multiwire circuit is designed to utilize multiple conductors that are connected to different phases of a three-phase power system. This configuration allows for the distribution of power more efficiently, as it can balance the load across the different phases. By connecting to different phases, the circuit can effectively double the voltage available to the load while using less copper for wiring, as the return path can utilize the neutral conductor effectively if it is set up properly.

This setup also helps in reducing voltage drop and enhancing the overall performance of the electrical system. When multiwire circuits are correctly designed, they boost efficiency and maintain safer operational conditions, as long as those conducting the work observe proper safety measures, such as ensuring that the multiwire circuit shares a common neutral and the breakers are appropriately listed for multiwire applications.

The other choices, while relevant to electrical systems, do not capture the essence of what a multiwire circuit specifically requires, which is the necessity to connect to different phases to achieve optimal operation.