Types of Electrical Drawing and Diagrams - Electrical Wiring Diagram The wiring diagram is used for the representation of electrical components in their approximate physical location using their specific symbols and their interconnections using lines. Vertical and horizontal lines are used to represent wires and each line represents a single wire that connects between electrical components. Electrical Schematic Symbols - Names And Identifications Here are charts to help you to identify symbols on electrical schematics. These electrical schematic symbols will help you to identify parts when working with an electrical schematic. Electronics symbols for schematics and wiring diagrams are mostly universal with a few of the symbols that may look different if reading other types of schematics. Electrical Electrical Schematic Symbols Typical Electrical Drawing Symbols and Conventions. PDF fileBasics 7 4 kV 3-Line Diagram : Basics 8 AOV Elementary & Block Diagram : Basics 9 4 kV Pump Schematic : Basics 10 480 V Pump Schematic : Basics 11 MOV Schematic (with Block included) Basics 12 12-/208 VAC Panel Diagram : Basics 13 Valve Limit Switch Legend : Basics 14 AOV Schematic (with Block included) Basics 15 Wiring (or Connection