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National Electrical Code Application Course
More than 2 million learners worldwide

National Electrical Code Application Course

Master the National Electrical Code from foundational principles to advanced special occupancies. This course gives electricians, contractors, and inspectors the deep code knowledge needed to size conductors, design protection systems, and pass inspections the first time. Every major article is covered with real-world application, not just theory.

Dedika for businesses

What you will learn:

You will build a complete working knowledge of the NEC, covering wiring methods, overcurrent protection, earthing and equipotential bonding, branch circuit and feeder design, and service entrance calculations. The course also addresses special occupancies including healthcare facilities, hazardous locations, and aquatic environments. You will apply electrical load calculation methods for residential and commercial projects and learn the specific requirements for photovoltaic systems, energy storage, and EV charging infrastructure. Inspection processes, common deficiencies, and troubleshooting techniques are included to prepare you for real job-site demands. By the end, you will read, interpret, and apply the NEC with the precision that professional electrical work requires.

How you study in practice National Electrical Code Application Course

How you practise National Electrical Code Application Course

For companies looking to train their teams

With Dedika for Businesses, the course includes exercises and examples tailored to your own business and the specific needs of your company.

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Course content

8 Chapters • 40 LessonsDuration between 4 and 360 hours (you decide)

Chapter 1See details

Foundations of Electrical Code Compliance

  • Lesson 1 • Units of Measure and Calculations

    Reviews electrical units and the mathematical relationships used in code calculations. Prepares students for load, conductor, and protection sizing tasks.

  • Lesson 2 • Definitions and Terminology

    Covers defined terms that carry precise legal meaning within the code. Accurate terminology prevents misapplication of requirements.

  • Lesson 3 • Applying General Requirements

    Introduces the general installation rules that apply across all occupancy types. These baseline requirements underpin every specialised article studied later.

  • Lesson 4 • History and Purpose of the Code

    Traces the origin of the national electrical standard and its role in public safety. Provides context for why compliance is legally and practically mandatory.

  • Lesson 5 • Navigating the Code Structure

    Explains the article, section, and exception hierarchy used throughout the code. Builds the lookup skills needed for every subsequent chapter.

Chapter 2See details

Wiring Methods and Materials

  • Lesson 1 • Wiring Method Selection by Environment

    Applies permitted-use rules to wet, corrosive, hazardous, and concealed locations. Students develop judgement for selecting compliant methods in complex field conditions.

  • Lesson 2 • Conductor Properties and Selection

    Examines insulation types, temperature ratings, and ampacity tables for conductors. Correct conductor selection is the prerequisite for all sizing calculations.

  • Lesson 3 • Cable Assembly Wiring Methods

    Details the permitted uses, installation rules, and restrictions for common cable assemblies. Students match cable type to occupancy and environmental conditions.

  • Lesson 4 • Raceway Systems

    Covers conduit types, fill calculations, and support requirements for raceway wiring methods. Raceway selection affects both code compliance and long-term system performance.

  • Lesson 5 • Boxes, Fittings, and Enclosures

    Addresses box fill calculations, enclosure types, and fitting requirements for all wiring methods. Proper box sizing prevents overheating and ensures safe conductor management.

Chapter 3See details

Overcurrent Protection and Devices

  • Lesson 1 • Ground-Fault and Arc-Fault Protection

    Details the locations and conditions requiring GFCI and AFCI protection. These devices address shock and fire hazards not covered by standard overcurrent protection.

  • Lesson 2 • Motor and Appliance Overcurrent Protection

    Addresses the special overcurrent protection rules for motors, HVAC equipment, and fixed appliances. Motor starting characteristics require different sizing than standard branch circuits.

  • Lesson 3 • Panelboard and Switchboard Requirements

    Covers installation, labelling, and overcurrent protection rules for panelboards and switchboards. These assemblies are the central distribution point for branch circuits and feeders.

  • Lesson 4 • Overcurrent Protection Principles

    Explains how overcurrent devices detect and interrupt fault and overload currents. Understanding device characteristics is essential before applying sizing rules.

  • Lesson 5 • Conductor Protection Rules

    Applies the standard rule and its exceptions for matching overcurrent device ratings to conductor ampacity. Correct sizing protects insulation from thermal damage.

Chapter 4See details

Earthing and Bonding Systems

  • Lesson 1 • Earthing Electrode Systems

    Covers required and supplemental electrodes, their installation, and interconnection rules. A properly assembled electrode system is the foundation of a compliant earthed installation.

  • Lesson 2 • Bonding of Metal Systems

    Covers bonding requirements for metal piping, structural steel, and other conductive systems. Proper bonding eliminates dangerous voltage differences between metallic parts.

  • Lesson 3 • Earthing vs. Bonding Concepts

    Distinguishes the separate functions of earthing and bonding within a system. Clarity on these concepts prevents the most common compliance errors in this area.

  • Lesson 4 • Service and System Earthing

    Details where and how the neutral-to-earth bond is established at the service. Students identify the main bonding jumper and its sizing requirements.

  • Lesson 5 • Equipment Earthing Conductors

    Addresses sizing, routing, and continuity requirements for equipment earthing conductors. These conductors provide the fault-current path that operates overcurrent devices.

Chapter 5See details

Branch Circuits, Feeders, and Services

  • Lesson 1 • Dwelling Unit Load Calculations

    Applies the standard and optional calculation methods to single-family and multifamily dwellings. Residential calculations are the most frequently tested application of load sizing rules.

  • Lesson 2 • Feeder Sizing and Design

    Covers feeder conductor sizing, demand factor application, and neutral conductor requirements. Feeders must carry the calculated load while meeting voltage drop targets.

  • Lesson 3 • Service Entrance Design

    Addresses service conductor sizing, service equipment requirements, and utility coordination. The service entrance is the point of highest fault-current exposure in the system.

  • Lesson 4 • Branch Circuit Classifications and Ratings

    Defines branch circuit types by rating and the loads permitted on each. Classification determines conductor size, device rating, and outlet requirements.

  • Lesson 5 • Load Calculations for Branch Circuits

    Applies demand factors and unit load values to calculate branch circuit loads. Accurate load calculations prevent undersized conductors and tripped circuit breakers.

Chapter 6See details

Special Occupancies and Locations

  • Lesson 1 • Hazardous Location Classification

    Explains the class, division, and zone systems for classifying areas with flammable materials. Correct classification is the prerequisite for all equipment and wiring method selection.

  • Lesson 2 • Wet and Aquatic Location Requirements

    Covers the enhanced protection rules for swimming pools, spas, fountains, and marinas. Water proximity creates unique shock hazards requiring specific equipment and bonding.

  • Lesson 3 • Equipment for Hazardous Locations

    Covers explosion-proof, intrinsically safe, and purged equipment types and their marking. Equipment selection must match the specific class and division of the classified area.

  • Lesson 4 • Agricultural and Commercial Occupancies

    Addresses the special rules for farm buildings, commercial garages, and similar occupancies. Unique environmental and operational hazards drive departures from standard installation rules.

  • Lesson 5 • Healthcare Facility Electrical Requirements

    Details the essential electrical system, patient care area, and isolated power requirements for healthcare. These requirements protect patients from microshock and power interruption.

Chapter 7See details

Low-Voltage (LV) and Communication Systems

  • Lesson 1 • Network-Powered Broadband Systems

    Addresses the unique requirements for broadband systems that deliver both power and signal. These systems bridge the gap between communication and power wiring rules.

  • Lesson 2 • Communication and Data Cabling

    Addresses installation rules for telephone, data, and coaxial cable systems. These systems have unique separation, support, and listing requirements distinct from power wiring.

  • Lesson 3 • Fire Alarm System Wiring

    Covers the wiring methods, power supply, and survivability requirements for fire alarm circuits. Fire alarm systems must remain operational during the emergency they are designed to detect.

  • Lesson 4 • Class 1, 2, and 3 Remote-Control Circuits

    Explains the power and wiring limitations that define each remote-control circuit class. Class determines permitted wiring methods, conductor sizes, and overcurrent protection.

  • Lesson 5 • Optical Fibre Cable Systems

    Covers listing, installation, and separation requirements for optical fibre cables. Hybrid cables containing conductors require additional compliance considerations.

Chapter 8See details

Renewable Energy and Emerging Technologies

  • Lesson 1 • PV Wiring Methods and Overcurrent Protection

    Details permitted wiring methods, conductor sizing, and overcurrent protection for PV circuits. DC arc characteristics require specific device ratings and wiring practices.

  • Lesson 2 • Photovoltaic System Fundamentals

    Covers PV system components, circuit definitions, and the unique DC characteristics that drive special code requirements. PV systems introduce voltage and current behaviours unlike standard AC systems.

  • Lesson 3 • Energy Storage System Requirements

    Covers battery system installation, ventilation, disconnecting means, and protection requirements. Energy storage systems present unique hazards from stored energy and off-gas potential.

  • Lesson 4 • Electric Vehicle Charging Infrastructure

    Applies branch circuit, load calculation, and EVSE installation requirements for EV charging. Growing EV adoption makes this one of the fastest-expanding application areas in the code.

  • Lesson 5 • Interactive and Stand-Alone PV Systems

    Addresses interconnection requirements for grid-tied systems and the additional rules for off-grid installations. Utility interconnection introduces anti-islanding and disconnecting means requirements.

Certification

Your valid completion certificate

This course is for you:

  • Licensed electrician: ready to move beyond apprenticeship-level code knowledge.

  • Electrical contractor: needs reliable code fluency to bid and manage projects.

  • Electrical inspector: wants a structured review of every major code article.

  • Engineering student: building technical depth before entering the electrical field.

  • Facilities manager: responsible for code-compliant building electrical systems.

  • Career changer: transitioning into electrical work from a related construction trade.

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