In what situation is a subpanel used?

A subpanel is primarily used to distribute power to a specific area or load within a building or facility. By placing a subpanel closer to a particular area that requires electricity, you can effectively manage power distribution, reducing the need for long runs of wiring from the main panel. This localized distribution allows for easier access to circuit breakers, simplifies the addition of new circuits in that area, and improves organization of the electrical system.

Using a subpanel is particularly beneficial in larger spaces, such as basements, garages, or workshops, where multiple circuits are needed to accommodate various appliances, tools, or lighting. This decentralized approach also enhances safety, as individual circuit breakers in the subpanel can isolate specific circuits should a fault occur, making it easier to troubleshoot and remedy issues without affecting the entire electrical system.