Electrical Schematics

Duration: 2.00 Hrs

Course Level: Intermediate
Languages: English

This is a two-part course which covers the 2020 NEC Changes. Part One covers the changes in Articles 242 and 250 of the National Electrical Code®. The new article 242 contains the requirements for overvoltage, or surge, protection. Article 250 covers the grounding and bonding of systems and equipment. Notable changes include the creation of Article 242 and deletion of Article 280 and 285, a new section addressing the bonding of equipment on the line side of the service, specific requirements for aluminum conductors, limiting the role of rebar in the grounding electrode system, fixing an error about the sizing of bonding jumpers, reducing the identification requirements for equipment ground conductors, and providing relief for the sizing of equipment grounding conductors in certain applications.

Part Two covers the changes in Articles 300, 310, 311, 312, and 314 of the National Electrical Code®. Article 300 contains general requirements for wiring methods. Article 310 covers conductors rated 2,000V and less. New Article 311 covers conductors rated more than 2,000V. Article 312 covers cabinets, cutout boxes, and meter socket enclosures. Article 314 covers outlet, device, pull, and junction boxes; conduit bodies; fittings; and handhole enclosures. Notable changes include clarifying which fittings may be concealed, harmonizing building code and electrical code rules for stair enclosures, a complete rewrite of Article 310, a new article 311, specific rules for cable trays and enclosures used together, and major changes for boxes in the ceilings of dwelling units.

Learning Objectives

By the end of this course, you will be able to:

• Explain why Articles 280 and 285 were combined into Article 242
• Describe the evolution of Article 250 since 2008
• Identify some of the system grounding configurations that are allowed in the NEC
• Explain why Article 310 was rewritten and explain the new requirements for Article 311
• List the requirements for conductors entering enclosures from a cable tray
• Discuss the rules for equipment in panelboard cabinets

Duration: 2.00 Hrs

Course Level: Intermediate
Languages: English
Compatibility: Audio, Video

This course is designed to familiarize participants with various types of electrical diagrams. After completing this course, participants should be able to explain why symbols are used on electrical diagrams, and how to obtain information from a title block and an equipment location index. They should also be able to explain how to use each of the following types of diagrams: block, single line, schematic, wiring, connection, interconnection, and raceway.

Learning Objectives

By the end of this course, you will be able to:

• Explain why symbols are used on electrical diagrams.
• State the purpose of the American Standard
• Device Function Numbers Table and the Standard Diagram Abbreviations Table.
• State the purpose of legends on electrical diagrams.
• Describe information commonly found in title blocks on electrical diagrams.
• State the purpose of notes on electrical diagrams.
• Define the term “equipment location index.”
• Describe how to use an equipment location index.
• State the purpose of a block diagram.
• State the purpose of a single line diagram.
• Identify symbols commonly used on single line diagrams.
• Describe information that can be found on single line diagrams.
• State the purpose of a schematic diagram.
• Describe how to read a schematic diagram.
• State the purpose of a wiring diagram.
• Describe how to use a wiring diagram to locate components.
• State the purpose of a connection diagram.
• Describe how to read a connection diagram.
• State the purpose of an interconnection diagram.
• Describe how to read an interconnection diagram.
• State the purpose of a raceway diagram.
• Describe how to read a raceway diagram.
• Explain how to use Raceway Notes, Symbols, and Detail Reference, and a Raceway.

Duration: 1.00 Hr

Course Level: Intermediate
Languages: English
Compatibility: Audio, Video

Electrical diagrams are drawings in which lines, symbols, and letter and number combinations are used to represent electrical circuits. In some plants, electrical diagrams may also be called prints, or blueprints. No matter what they are called, however, these drawings are valuable tools for anyone involved in making new electrical installations, locating electrical problems, or modifying existing circuits. There are many different types of electrical diagrams. Each type is drawn differently to provide different information. The four types of electrical diagrams covered in this course are block diagrams, single-line diagrams, schematic diagrams, and wiring diagrams.

Learning Objectives

By the end of this course, you will be able to:

• Describe the purpose of the American Standard Device Function Numbers Table and the Standard Diagram Abbreviations Table.
• State the purpose of a block diagram and a legend.
• Define the purpose of a single-line diagram.
• Identify a motor circuit and a control circuit on a schematic.

Duration: 1.00 Hr

Course Level: Intermediate
Languages: English
Compatibility: Audio, Video

A great deal of electrical maintenance work depends on the ability of maintenance electricians to read and understand electrical diagrams. This course focuses on connection diagrams, interconnection diagrams, raceway diagrams, and logic diagrams.

Learning Objectives

By the end of this course, you will be able to:

CONNECTION AND INTERCONNECTION DIAGRAMS

• Define connection diagrams.
• Describe or demonstrate how to read connection diagrams.
• Define interconnection diagrams.
• Describe or demonstrate how to read interconnection diagrams.

EQUIPMENT LOCATION INDEX

• Explain what an equipment location index is.
• Describe or demonstrate how to use an equipment location index.

RACEWAY DIAGRAMS, PART 1

• Define raceways and raceway diagrams.
• Describe or demonstrate how to read raceway diagrams.
• Explain how to use a “Raceway Notes, Symbols, and Detail” reference.
• Explain how to use a raceway schedule.
  Describe or demonstrate how to locate specific components or pieces of equipment in a plant.

RACEWAY DIAGRAMS, PART 2

• Describe how to apply a raceway diagram and its associated references to extract information about a plant.
• Define percent fill.

LOGIC SYMBOLS

• Explain what logic gates are.
• Explain how truth tables are organized.
• Name five types of logic gates and explain under what conditions each has an output.

LOGIC DIAGRAMS

• Describe or demonstrate how to read a logic diagram.
• Describe or demonstrate how to locate a logic function within a logic controller.