This course, NEC 2026: Theory and Calculations, has been approved by the Mississippi State Board Of Contractors for 2 hours of continuing education credit.
Course description
Covers changes in the 2026 National Electrical Code that bear on electrical theory and circuit calculations, beginning with the Article 110 general requirements: available fault current coordination in 110.10, arc-flash marking in 110.16, fault current field marking in 110.24, and working space for DC systems in 110.26. Participants then examine the two new Chapter 1 articles, Article 120 dwelling unit load calculations and Article 130 energy management systems and power control systems.
The course addresses branch-circuit requirements in Article 210, including conductor sizing in 210.19, GFCI protection in 210.8, AFCI revisions in 210.12 and receptacle placement in 210.52, followed by overcurrent protection and arc energy reduction in Articles 240 and 242. Later modules cover conductor sizing and grounding calculations for medium-voltage and high-voltage systems in the new Articles 268 and 270, equipment grounding conductor sizing in 250.122, and the revised ampacities in Table 310.16.
Learning objectives
- Identify changes in Article 110 for available fault current, arc-flash marking and working space for DC systems.
- Calculate dwelling unit loads under new Article 120 and size branch-circuit conductors under 210.19.
- Size equipment grounding conductors and grounding electrode conductors under 250.122 and new Article 270 for systems over 1000 volts AC and 1500 volts DC.
- Apply GFCI, AFCI and surge protection requirements from Articles 210, 215 and 242 to dwelling and service installations.
Disclosure of proprietary interest. No instructor, subject-matter expert or content author involved in developing or delivering this course holds any financial or ownership interest in any product, instrument, device or material referenced in it, and none receives any royalty, profit share or other consideration from the promotion or endorsement of any product. This course does not endorse any commercial product or service.
Course Features
- Lectures 35
- Quizzes 34
- Duration 52 weeks
- Skill level All levels
- Language English
- Students 0
- Certificate Yes
- Assessments Self
- Format Audio + Text
- 1 Section
- 35 Lessons
- NEC 2026: Theory and Calculations69
- 1.1Course Orientation
- 1.2110.10 – How has the focus of Section 110.10 shifted regarding Available Fault Current?
- 1.3110.10 – How has the focus of Section 110.10 shifted regarding Available Fault Current?1 Question
- 1.4110.14 – Are Your Compounds “Identified” or Just “Suitable”?
- 1.5110.14 – Are Your Compounds “Identified” or Just “Suitable”?1 Question
- 1.6110.16 – Arc-Flash Labels: From Generic Warnings to Detailed Markings
- 1.7110.16 – Arc-Flash Labels: From Generic Warnings to Detailed Markings1 Question
- 1.8110.21 – Updating References for Field-Applied Hazard Markings
- 1.9110.21 – Updating References for Field-Applied Hazard Markings1 Question
- 1.10110.24 – How Must Fault Current Labels Be Marked in 2026?
- 1.11110.24 – How Must Fault Current Labels Be Marked in 2026?1 Question
- 1.12110.26 – How Have Working Space Rules Changed for DC Systems and Enclosed Parts?
- 1.13110.26 – How Have Working Space Rules Changed for DC Systems and Enclosed Parts?1 Question
- 1.14110.31 – How have fence clearance requirements changed for High-Voltage DC systems?
- 1.15110.31 – How have fence clearance requirements changed for High-Voltage DC systems?1 Question
- 1.16120.41 – How are Dwelling Unit Load Calculations Changing in 2026?
- 1.17120.41 – How are Dwelling Unit Load Calculations Changing in 2026?1 Question
- 1.18130.1 – Why have Energy Management Systems moved to Chapter 1?
- 1.19130.1 – Why have Energy Management Systems moved to Chapter 1?1 Question
- 1.20130.2 – What are the New Listing Requirements for Energy Management Equipment?
- 1.21130.2 – What are the New Listing Requirements for Energy Management Equipment?1 Question
- 1.22130.60 – How must Power Control Systems (PCS) handle malfunctions under the 2026 NEC?
- 1.23130.60 – How must Power Control Systems (PCS) handle malfunctions under the 2026 NEC?1 Question
- 1.24130.70 – How Must Power Control System (PCS) Settings Be Configured?
- 1.25130.70 – How Must Power Control System (PCS) Settings Be Configured?1 Question
- 1.26210.11 – Are Small Appliance Circuits Now Strictly Dedicated?
- 1.27210.11 – Are Small Appliance Circuits Now Strictly Dedicated?1 Question
- 1.28210.12 – AFCI Updates: Welding Exceptions & Retrofit Flexibility
- 1.29210.12 – AFCI Updates: Welding Exceptions & Retrofit Flexibility1 Question
- 1.30210.14 – Where did the Specific-Purpose Branch Circuits Table go in the 2026 NEC?
- 1.31210.14 – Where did the Specific-Purpose Branch Circuits Table go in the 2026 NEC?1 Question
- 1.32210.17 – Do Dormitories With Cooking Provisions Require Dwelling Unit Branch Circuits?
- 1.33210.17 – Do Dormitories With Cooking Provisions Require Dwelling Unit Branch Circuits?1 Question
- 1.34210.19 – Where Did the Calculation Tables Go? Sizing Branch-Circuit Conductors
- 1.35210.19 – Where Did the Calculation Tables Go? Sizing Branch-Circuit Conductors1 Question
- 1.36210.52 – Where Can Receptacles Go? New Restrictions for Islands and Cabinets
- 1.37210.52 – Where Can Receptacles Go? New Restrictions for Islands and Cabinets1 Question
- 1.38210.8 – Updates to GFCI Requirements: Outdoor Outlets, HVAC, and High Frequencies
- 1.39210.8 – Updates to GFCI Requirements: Outdoor Outlets, HVAC, and High Frequencies1 Question
- 1.40215.18 – New SPD Requirements for Emergency Service Sleeping Quarters
- 1.41215.18 – New SPD Requirements for Emergency Service Sleeping Quarters1 Question
- 1.42240.4 – How Has Small Conductor Protection and OCPD Terminology Changed?
- 1.43240.4 – How Has Small Conductor Protection and OCPD Terminology Changed?1 Question
- 1.44240.67 – How has Arc Energy Reduction for Large Fuses been Updated?
- 1.45240.67 – How has Arc Energy Reduction for Large Fuses been Updated?1 Question
- 1.46240.87 – How Has Arc Energy Reduction Terminology Updated?
- 1.47240.87 – How Has Arc Energy Reduction Terminology Updated?1 Question
- 1.48242.1 – How Has the Scope of Article 242 Changed for DC Systems?
- 1.49242.1 – How Has the Scope of Article 242 Changed for DC Systems?1 Question
- 1.50242.54 – How have cross-references for surge arrester interconnections changed?
- 1.51242.54 – How have cross-references for surge arrester interconnections changed?1 Question
- 1.52250.122 – Restructured Rules for EGC Sizing and Citations
- 1.53250.122 – Restructured Rules for EGC Sizing and Citations1 Question
- 1.54268.31 – New Requirements for Service Conductor Sizing and Ampacity
- 1.55268.31 – New Requirements for Service Conductor Sizing and Ampacity1 Question
- 1.56268.42 – How are Medium Voltage Service Conductors Sized in the 2026 NEC?
- 1.57268.42 – How are Medium Voltage Service Conductors Sized in the 2026 NEC?1 Question
- 1.58270.122 – New Article 270: Sizing EGCs for Medium Voltage Systems
- 1.59270.122 – New Article 270: Sizing EGCs for Medium Voltage Systems1 Question
- 1.60270.166 – How are DC Grounding Electrode Conductors Sized in the 2026 NEC?
- 1.61270.166 – How are DC Grounding Electrode Conductors Sized in the 2026 NEC?1 Question
- 1.62270.66 – How Do You Size AC Grounding Electrode Conductors for Systems Over 1000V AC/1500V DC in 2026?
- 1.63270.66 – How Do You Size AC Grounding Electrode Conductors for Systems Over 1000V AC/1500V DC in 2026?1 Question
- 1.64310.16 – New Ampacities for Small Conductors and Copper-Clad Aluminum
- 1.65310.16 – New Ampacities for Small Conductors and Copper-Clad Aluminum1 Question
- 1.66406.46 – Have Switch Ratings Moved to Article 406?
- 1.67406.46 – Have Switch Ratings Moved to Article 406?1 Question
- 1.68422.11 – New Acronyms and Relocated Tables for Appliance Protection
- 1.69422.11 – New Acronyms and Relocated Tables for Appliance Protection1 Question
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