One-Line Diagrams in Revit

As I work with electric engineers who are migrating to Revit, a common question that I get is “How do I create one-line diagrams in Revit”.  One-line diagrams, also called single-line diagrams, are an important part of electrical drawings for construction documents, so it is a subject that needs to be addressed.  They are a simplified method of representing a 3-phase power system that shows distribution boards, switchboards, transformers, panels, breakers, etc., with lines illustrating the connectivity of the components of the distribution system.  The diagram is not just for physical construction of the building’s electrical system, but developed by the electrical engineer during early stages of design.

The problem that you run into with creating one-line diagrams inside Revit is that the one-line diagrams are generally created before the equipment is actually placed in the Revit model.  The electrical engineer will design the building’s electrical system by…