iKNOW Electrical Print Reading
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.
- 1. Introduction to Electrical Schematics
- 2. Electrical Schematic Symbols - Input Devices
- 3. Electrical Schematic Symbols - Logic and Output Devices
- 4. Interpreting Electrical Schematics
- 5. Introduction to Electrical Diagrams
- 6. Building Electrical Diagrams
- 7. Single-Line Electrical Diagrams
- 8. Wiring Diagrams
Introduction to Electrical Schematics
Description: This is the first lesson in the iKNOW™ Electrical Print Reading Library. This lesson teaches about input, logic, and output devices, and the state in which symbols are drawn on electrical schematics.
Prerequisites: None
Topics:
Input
Logic
Output
Schematics
Objectives:
- 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
Electrical Schematic Symbols - Input Devices
Description: This is the second lesson in the iKNOW™ Electrical Print Reading Library. The lesson presents the symbols for various manually and process actuated input devices and how they are represented on an electrical schematic.
Prerequisites: Introduction to Electrical Schematics is recommended.
Topics:
Manually Actuated Devices
Process Actuated Devices
Equipment Actuated Devices
Objectives:
- 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
Electrical Schematic Symbols - Logic and Output Devices
Description: This is the third lesson in the iKNOW™ Electrical Print Reading Library. This lesson defines the function of logic and output elements of a control circuit and presents the symbols for various logic and output devices.
Prerequisites: Introduction to Electrical Schematics is recommended.
Topics:
Logic Devices
Control and Latching Relays
Time Delay Relays
Output Devices
Objectives:
- 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
Interpreting Electrical Schematics
Description: This is the fourth lesson in the iKNOW™ Electrical Print Reading Library. This lesson describes the steps for interpreting the relationships among the input, logic, and output components of an electrical schematic.
Prerequisites: Knowledge of electrical schematic symbols for input, logic, and output devices.
Topics:
Schematic Structure
Labels and Margin Notes
Steps in Analyzing the Schematic
Analyzing the Schematic
Objectives:
- 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
Introduction to Electrical Diagrams
Description: This is the fifth lesson in the iKNOW™ Electrical Print Reading Library, and the first lesson covering electrical diagrams. This lesson presents information about the purpose of various types of electrical diagrams and how to interpret the information in the title block. It also explains how to make electrical drawing revisions.
Prerequisites: General knowledge of electrical schematic symbols is recommended.
Topics:
Purpose of Drawings
Diagram Organization
Title Page
Revisions
Objectives:
- 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
Building Electrical Diagrams
Description: This is the sixth lesson in the iKNOW™ Electrical Print Reading Library. This lesson presents the different views used in electrical diagrams as well as how to identify components, cables, and conduits. The cable chart is also presented.
Prerequisites: Introduction to Electrical Diagrams
Topics:
Floor Plan View
Elevation View
Equipment, Cable, and Conduit Identification
Cable Charts
Objectives:
- 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
Single-Line Electrical Diagrams
Description: This is the seventh lesson in the iKNOW™ Electrical Print Reading Library. This lesson presents information regarding how to identify loads, equipment, and isolation breakers on a single-line electrical diagram.
Prerequisites: Introduction to Electrical Diagrams Topics:
Topics:
Voltage Conventions
Symbology
Loads
Isolation Breakers
Objectives:
- 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
Wiring Diagrams
Description: This is the final lesson in the iKNOW™ Electrical Print Reading Library. The lesson presents information how to identify components, equipment, wires and cables on a wiring diagram. It also explains how to relate a wiring diagram to the installed hardware and how to use diagrams for maintenance and troubleshooting problems.
Prerequisites: Introduction to Electrical Diagrams
Topics:
Components
Terminal and Wiring Conventions
Wiring Bundles
Relation to Actual Hardware and Wires
Troubleshooting with Wiring Diagrams
Objectives:
- 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