The dashed line on an electrical diagram represents what?

In an electrical diagram, a dashed line typically indicates concealed wiring that is not visible at the surface level. This type of representation makes clear to technicians and engineers that the wiring is hidden within the structure, such as in flooring or walls, which is important for understanding how the electrical system is installed and to ensure proper placement of outlets, switches, and other components.

Concealed wiring is critical for maintaining a clean and organized appearance throughout a space, as well as for safety and code compliance. The other options represent different types of wiring scenarios, but they do not typically use dashed lines in diagrams. Instead, other line styles or annotations would signify surface wiring, exposed wire, or wiring located above ceiling tiles. Understanding these conventions helps technicians accurately interpret plans and makes for safer and more efficient installation and maintenance of electrical systems.