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NJATC Applied Codeology: Understanding the NEC 2005 Edition

Applied Codeology: Understanding the (2005) NEC
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Applied Codeology:
Understanding the NEC®
2005 Edition

Author: NJATC

1st Edition

Designed as a “how to” guide on reading and interpreting the 2005 National Electrical Code®Applied Codeology is a working companion to the Code®, written by the experts at the NJATC (National Joint Apprenticeship Training Committee) .

Apprentices, journeyman, contractors, engineers, designers, and estimators alike will benefit from this positive, systematic approach to understanding the Code®. 

Readers are encouraged to first examine a section from the Code® Book before referring to the correlating annotations in this manual.  Where questions are used to illustrate the “applied codeology” system, users are requested to locate the answer in the suggested Code® article before checking the answer in this book. 

This methodical handling of and practice using the Code® Book encourages proficiency in users, and soon they will be able to decide where the answer is located before the Code® Book is even opened.  The result is better electrical installations through a higher Code understanding, as well as optimization of the Code® Book as a first-rate tool of the trade.


  • guides readers in using the Code® as a tool to increased skill & proficiency in making Code-complaint installations
  • helps users apply a simple-to-use technique to quickly locate NEC Code sections
  • explains how the 2005 NEC® is used, where to find key information, and how to apply the Code® to the question at hand
  • encourages integration of the Code® with the planning of an electrical installation, making it easier for the electrician to be in compliance with the 2005 NEC®
  • aids in Code® interpretation, resulting in safer and more dependable installations


Unit 1- The Development of the National Electrical Code: The NEC Process, Sequence of Events, Committee Membership Classifications, Summary, Review Questions.

Unit 2- Basic Building Block #1: Table of Contents: NEC Table of Contents, Summary, Review Questions.

Unit 3- Basic Building Block #2: Section 90.3: The Arrangement of the NEC, Section 90.3, Summary, Review Questions.

Unit 4- Basic Building Block #3: NEC Structure: NEC Organization, Mandatory Rules, Permissive Rules, and Explanatory Material, Summary, Review Questions.

Unit 5- Basic Building Block #4: Article 100: The Language of the NEC: NEC Language: Article 100, Summary, Review Questions.

Unit 6- Codeology Fundamentals: Marking up Your Codebook, Clues and Keywords, The Four Basic Building Blocks of the Codeology Method, Getting in the Right Chapter, Article, and Part, Fundamental Steps Using Codeology, Summary, Review Questions.

Unit 7- Article 90, The Introduction to the NEC: NEC How to Begin, Article 90 Introduction, Summary, Review Questions.

Unit 8- Chapter 1 of the NEC, General: NEC Chapter 1-General, Article 110 Requirements for Electrical Installations, Part I General, Part 11 600 Volt, Nominal or Less, Part II Over 600 Volts, Nominal, Part IV Tunnel Installations Over 600 Volts, Nominal, Part V Manholes and Other Electric enclosures Intended for Personnel Entry, All Voltages, Key Words/Clues for Chapter 1- General, Summary, Review Questions, Practice Problems.

Unit 9- Chapter 2 of the NEC, "Plan": Wiring, Protection, Key Words/Clues for Chapter 2, "Plan", Think Plan and go to Chapter 2, Summary, Review questions, Practice Problems.

Unit 10- Chapter 3 of the NEC, "Build": NEC Chapter 3 "Build", Wiring Methods, General Information for all Wiring Methods and Materials, Cabinets, Boxes, Fittings, and Meter Socket/Handhole Enclosures, Cable Assemblies and Raceways, Key Words/Clues for Chapter 3, "Build", Think Build and go to Chapter 3, Summary, review Questions, Practice Problems.

Unit 11- Chapter 4 of the NEC, "USE": NEC: Chapter 4 "Use", Categoration of Chapter 4, Key Words/Clues for Chapter 4, "Use", Summary, Review Questions, Practice Problems.

Unit 12- Chapters 5, 6, and 7 of the NEC, Special: Arrangement of the Special Chapters, The general, Plan, Build, and Use Stages are Modified and Supplemented by Chapters 5, 6, and 7, NEC Chapter 5 "Special Occupancies", Hazardous Locations, Zone Classifications System, Health Care Facilities, Assembly Occupancies for 100 or More Persons, Entertainment Venues, Agricultural Buildings for Poultry, Livestock and Fish, Manufactured Buildings, Dwellings and Recreational Structures, Structures on or Adjacent to Bodies of Water, Temporary Installations, NEC Chapter 6 "Special Equipment", NEC Chapter 7 "Special Conditions", Summary, Review Questions, Practice Problems.

Unit 13- Chapter 8 of the NEC, Communications Systems: NEC: Chapter 8 Communications Systems, Summary, Review Questions, Practice Problems.

Unit 14- Chapter 9 of the ... (more...)

About the Author:

National Joint Apprenticeship Training Committee:

NJATC develops and standardizes training for National Electrical Contractors Association and the International Brotherhood of Electrical Workers, which represents more than 780,000 members working in a wide variety of fields around North America.

192 Pages - 8-1/2 x 11 in. Hardcover


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