This lesson was designed to provide training for electricians, mechanics, and others, wanting to know more about electrical print reading. This library consists of eight interactive, on-line. These lessons take approximately 30 to 45 minutes to complete.

Introduction to Electrical Schematics


Electrical Schematic Symbols - Input Devices


Electrical Schematic Symbols - Logic and Output Devices


Interpreting Electrical Schematics


Introduction to Electrical Diagrams


Building Electrical Diagrams


Single-Line Electrical Diagrams


Wiring Diagrams

• Name the three groups of input devices.
• Describe the function of the input element of a control circuit.
• Describe the function of the logic element of a control circuit.
• Describe the function of the output element of a control circuit.
• Describe the state in which symbols are drawn on electrical schematics.

• Identify the symbols for various manually operated input devices.
• Explain how various manually operated input devices are used.
• Identify symbols for various process actuated input devices.
• Explain how various process actuated input devices are used.
• Given an electrical schematic, identify a process actuated device.
• Identify symbols for two-position actuated input devices.
• Explain how and two-position actuated input devices are used.

• Describe the function of the logic element of a control circuit.
• Describe the function of the output element of a control circuit.
• Identify the symbol for a relay and the associated contacts.
• Identify various logic symbols and state how they are used.
• Identify the symbol for a motor starter and state how it is used.
• Identify various output symbols and state how they are used.

• List and define the two basic parts of an electrical schematic.
• Describe the layout of a typical electrical schematic.
• List and describe various conventions for labeling schematics.
• Describe the steps for interpreting schematics.
• Given a device in an electrical schematic, state the function of that device.
• Given a rung in an electrical schematic, interpret the function of that rung.
• Given the margin notes in an electrical schematic, determine what rungs are associated with the output device.
• Interpret an electrical schematic.

• Explain the purpose and types of electrical drawings.
• Describe the layouts of electrical diagrams.
• Explain the information given in a title block in an electrical diagram.
• Explain how to make electrical drawing revisions.

• Describe the floor plan view of an electrical diagram.
• Describe the elevation view of an electrical diagram.
• Identify components in a building electrical diagram.
• Identify cables and conduits in a building electric diagram.
• Identify the cable chart in a building electrical diagram.

• Explain the purpose of single-line diagrams.
• Identify voltage conventions in a single-line diagram.
• Identify symbology in a single-line diagram.
• Identify loads in a single-line diagram.
• Identify isolation breakers in a single-line diagram.

• Identify components in a wiring diagram.
• Identify terminal conventions in a wiring diagram.
• Identify wiring conventions in a wiring diagram.
• Identify and interpret bundles in a wiring diagram.
• Relate the wiring diagram to actual hardware.
• Relate the wiring diagram to actual wires.
• Troubleshoot a circuit using wiring diagram.