Which symbol indicates a junction box in blueprints?

A junction box is represented on blueprints by a square with a circle in the middle. This symbol is standardized and easily recognized in electrical schematics, indicating that it is a location where wires are joined together, and connections are made. The square shape typically signifies a container or enclosure, while the circle indicates the opening or connection point. This representation helps electricians and other professionals understand where to install junction boxes in a building or project. Understanding these symbols is crucial for maintaining clarity and accuracy in electrical installations, as well as for ensuring compliance with safety standards.