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.

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