What is the term for an electrical panel that uses a double-pole breaker to isolate the 120-volt circuits?

The term that describes an electrical panel using a double-pole breaker to isolate 120-volt circuits is known as a split-bus panel. This type of panel is designed to allow for the separation of circuits, enabling effective management of both 120-volt and 240-volt circuits. In a split-bus panel configuration, part of the panel is dedicated to 240-volt circuits, while the other part provides access to the 120-volt circuits. The double-pole breaker in this setup is instrumental in providing the necessary isolation by connecting to both hot bus bars, thus facilitating the safe operation of multiple circuits without compromising the overall electrical distribution.

In contrast, other options such as a subpanel, main panel, and distribution panel reference different configurations or designs of electrical panels, but they do not specifically relate to the isolation of 120-volt circuits via a double-pole breaker in the same way that a split-bus panel does. A subpanel is typically a smaller panel connected to the main panel for additional circuit distribution, while a main panel serves as the primary hub for electrical supply to the building. A distribution panel generally refers to any panel that directs the flow of electricity to various circuits but does not imply the specific split-b