National Electrical Code

The NEC® is the foundation of electrical safety in the U.S., and understanding its structure, updates, and application is essential for professionals in design, installation, and inspection. This course, led by a nationally recognized NEC® expert, covers key topics such as grounding, overcurrent protection, wiring methods, and service requirements. Participants will gain the skills to design code-compliant systems, avoid costly mistakes, and stay informed on the latest code changes and interpretations.

• Electricians, technicians, and inspectors responsible for electrical system safety and compliance.
• Engineers and designers involved in electrical system planning and implementation.
• Contractors, supervisors, and safety personnel seeking to stay current with NEC® standards.

The course will likely NOT be approved for Electrical Trade credit in Wisconsin.

Introduction

• The purpose of the NEC® and what it covers
• The code arrangement: how the parts complement each other
• Metric and other measurement rules
• Definitions

Requirements for Electrical Installations

• Electrical connections
• Flash protection
• Working space clearances
• Dedicated equipment space
• Circuit impedance and other characteristics
• Interrupting rating of O/C devices
• Identification of disconnects for services, feeders, and branch circuits
• Identification of grounded conductors
• Branch circuit analysis
• AFCI and GFCI requirements
• Receptacle outlet locations

Service and Feeder Applications

• Services and feeders up to 600 volts
• Multi-building complexes
• Disconnect requirements
• Rules on overcurrent protection
• Ground fault protection for services and feeders

Protecting Conductors and Equipment from Overloads and Fault Currents

• Overcurrent protection requirements for conductors and equipment
• Feeder and transformer tap rules

Grounding and Bonding

• How to provide an effective ground fault path
• When are systems required to be grounded?
• Grounding service supplied AC systems
• Grounding separately derived systems
• Grounding rules at separate buildings or structures
• Equipment grounding conductors
• Grounding electrode system

Wiring Methods

• Temporary wiring, including GFCI requirements
• Cable and raceway types
• Securing and supporting raceways and cables
• Installation in air handling spaces
• Physical protection and burial depths

Conductors for General Wiring

• Application of correction and adjustment factors
• Application of terminal temperature limitations
• Continuous and non-continuous loads

Motors, Motor Circuits, and Controllers

• O/C rating for motor feeder circuits
• Analysis of motor feeders and branch circuits
• Selecting conductors, controllers, and disconnects
• O/C protection and special applications

Transformers

• How to select proper overcurrent protection
• Where to install primary and secondary O/C devices
• Use of primary O/C device to protect secondary conductors
• Location requirements

Raceway Fill Calculations

• When and how Annex C can be used
• Installing multi-conductor cables in conduit
• The use of raceway sizing tables in Chapter 9

I enjoyed the willingness of the instructor to share detailed experiences of his related to code and installation challenges. He was very knowledgeable and took his time teaching, often injecting humerus comments into what some would consider a very dry subject… really appreciate the time taken by the instructor and program director in making this course as enjoyable as possible as well as comprehensive… I would definitely sign up for another course taught by Noel in the future if the opportunity presented itself.
— Stefen LeClair (In-Person attendee)

I really appreciated the interactive elements, such as the quizzes, polls, and the overall emphasis on engaging students. These activities helped reinforce the material in a fun and memorable way. The group activities were also of excellent quality—well-organized and thought-provoking, which encouraged collaboration and deeper understanding. Additionally, the material covered was comprehensive, providing a solid foundation on key concepts.
— Krystel Navas (Online attendee)

Noel Williams

Noel runs Noel Williams Consulting (more than 20 years) and serves as an instructor and developer of electrical training programs covering electrical safety, including the National Electrical Code and related standards. He has provided training services for Salt Lake Community College, NFPA, NTT, IAEI, and private clients that included Los Alamos National Labs, Alcan Cable, Thiokol, Honeywell, Salt Lake City Airport, and the University of Utah Hospital. He has taught thousands of students throughout most of the United States as well as a few other countries for over 25 years. He has also worked as a subject matter expert for development of online training programs and as an expert witness.