AutoCAD Electrical Symbols AutoCAD Electrical Symbols AutoCAD Electrical Symbols This CAD Electrical Symbols Library is one of our top sellers! Creating your own AutoCAD electrical symbols from scratch in AutoCAD is a massive waste of time! This is a great starter set of CAD electrical symbols and CAD electrical blocks that will help you work faster and save time.Free electrical, electronic, pneumatic and hydraulic schematic symbols library with DXF, DWG and Visio formats, ordered by stencils.