What do dot dash lines mean in an interconnection diagram?

In an interconnection diagram, dot dash lines are utilized to depict specific structural elements of the system, such as the outline of panel sections. These lines help clarify the arrangement of the components within the system, illustrating borders or boundaries rather than functional aspects like wiring paths or signal flow. This visual cue is particularly useful for understanding the layout and organization of the various parts of an electrical system, aiding in the overall comprehension of how the elements fit together within a physical context.

The other options represent different elements that may be shown in an interconnection diagram but do not accurately describe the purpose of dot dash lines. For instance, wiring paths and signal flow are typically represented using solid or different styles of lines to indicate the actual connections or information pathways, while ground connections often have their own specific notation for clarity. Thus, the use of dot dash lines for outlining panel sections is essential in visually delineating the structure within the diagram.