Electrical Riser Diagrams

An electrical riser diagram (also known as a "one-line" diagram) is a drawing that shows how an electrical system is designed by diagramming how the different components are connected. It is the roadmap which electricians use as the directions to how the system is put together. This can be a simple diagram with only one electrical panel as you would find in a house. Or, it could be it could contain several hundred distribution devices as you would find in a 30-story hotel. Either way, the electrical riser diagram shows the sizes and locations of all transformers, panelboards, conductors, conduit, etc. in am electrical design.

Below are sample riser diagrams. The image will give an overview of the design while the pdf download gives more detail and clarity. In order to view the pdf document you will need to have Adobe Reader installed. It can be downloaded for free here.

Riser 17
An existing 480V 3ø system that is retrofitted to provide a generator for the entire distribution.

Download this riser diagram in PDF format



Riser 18
600amp 208V 3ø system for an apartment building.

Download this riser diagram in PDF format



Riser 19
A very complex electrical system for a communications company which demonstrates a mix of generators, UPS modules, distribution panels and redundant grounding.

Download this riser diagram in PDF format

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