Part one of this interactive online course covers the changes to wiring methods in the 2023 National Electrical Code®. Articles covered in this course include Articles 320, 334, 336, 342, 352, 356, 358, 369, and 371. Article 320 covers armored cable (Type AC). Article 334 covers non-metallic-sheathed cables (Types NM and NMC). Article 336 covers power and control tray cable (Type TC). Article 342 covers intermediate metal conduit (IMC). Article 352 covers rigid polyvinyl chloride conduit (PVC). Article 356 covers liquid-tight flexible nonmetallic conduit (LFNC). And Article 358 covers electrical metallic tubing (EMT). Notable changes include the addition of Article 369, which covers insulated bus pipe (IBP)/tubular covered conductors (TCC), and Article 371, which covers flexible bus systems. By the end, learners will understand the critical regulations, best practices, and safety considerations for wiring methods outlined in 2023 NEC®.
In part two of this course, we’ll discuss revisions made to Articles 410, 422, 426, 430, 440, 445, 450, and 480. Notable changes include the addition of a new part to Article 410 addressing germicidal irradiation luminaires and new restrictions added to Article 440. Article 445 clarifies the requirements for the generator’s disconnecting means and reviews the signage requirements for the generator’s emergency shutdown device, and “transformer” is now defined and enforced through Article 450.
After successfully completing this course, you will be able to:
• Explain the requirements for cables in attics as described in 320.23
• Discuss the revisions in 334.24 for cable bending radius
• Recognize when 336.10 allows tray cable for services
• List the increased permitted sizes in 342.20 and 358.20 for IMC and EMT
• Recall when 352.44 requires expansion fittings
• Discuss the new allowances for EMT in 358.10
• Explain what the new Article 371 applies to
• Discuss the requirements for the disconnection of LED drivers in 410.71
• Recall the requirements for flexible cords in 422.16
• Recall the requirements for GFPE in 426.28 for snow melting and deicing equipment
• Describe the clearance requirements of 440.8
• List the requirements in 445.18 for generator disconnects
• Explain the revised definition and Article scope for transformers in Article 100 and Article 450
