What type of drawing typically provides measurable lengths of feeder conduits?

A riser diagram is specifically designed to provide a clear and concise representation of how systems like feeders are interconnected between different levels of a building or structure. It illustrates the vertical layout of electrical components, indicating the paths taken by conduits and wiring. This type of drawing is crucial for showing the size and routing of feeder conduits, allowing for accurate interpretations of where and how these conduits will run, thereby providing measurable lengths.

In contrast, an isometric drawing presents a 3D view of an object to convey spatial information but does not typically focus on the specifics of lengths in a context that would be as detailed as a riser diagram. A site plan usually depicts the arrangement of structures and utilities on a given plot of land but does not provide measurements specific to feeder conduits. Meanwhile, detail drawings focus on particular components or aspects of a larger drawing, and while they can include measurements, they do not encompass the overall measurement of feeder conduits as effectively as a riser diagram.