Electric Symbols on Blueprints - House Plans Helper wwweplanshelper›Blueprint SymbolsHome > Blueprint Symbols > Electric Symbols Electric Symbols on Blueprints. If you want to make sense of electric symbols on your blueprints then you’ve come to the right place. The placement of the outlets for all the electrical items in your home can have a significant impact on the design of your home.Lighting Symbols · TV · Floor Plan Symbols · Free Blueprint Symbols · HVAC Symbols T & T - Understanding a residential electrical plan From our 30 year archive, we give you the best plans that are ready to build from, or you can customize them in any way you wish through our plan customization service. Understanding a Residential Electrical Plan. Below is an example of the electrical legend found on most of our house plans.