How are electrical panels generally represented in blueprints?

Electrical panels are typically represented in blueprints as rectangles labeled with the panel number. This representation is standard practice because it clearly indicates the size and position of the electrical panel within the layout of a building or system. The rectangular shape allows for easy identification and distinguishes the panel from other elements in the diagram, such as fixtures or conduits.

Labeling the panel with a corresponding number further enhances clarity, providing essential information that connects the blueprint to electrical load calculations, panel schedules, and other documentation. This method of representation ensures that electricians and other professionals can quickly locate and understand the electrical service points in a given project.

In contrast, the other options do not conform to standard drafting practices used in electrical blueprints, which could lead to confusion and misinterpretation of the design.