2026 NEC Analysis of Changes - Part 2 - Article 240 through Article 430

This online course analyzes the major changes to the National Electrical Code (NEC®) for the 2026 cycle. Members of the eighteen NEC code-making panels contributed to the development of the authoritative text used in this online course.

The course covers more than 120 of the most significant code changes in articles 240 through 430. Specifically, the course examines wiring and protection, wiring methods and materials as well as equipment for general use.

Upon successful completion of this course, the student will be able to:

• Explain code changes related to grounding and bonding
• Identify changes to branch circuits and feeders over 1000 volts
• Summarize code changes to outside branch circuits and feeders over 1000 volts
• Discuss code changes related to services over 1000 volts
• Describe code changes for grounding and bonding to systems over 1000 volts
• Explain code changes to the general requirements for wiring methods and materials
• Identify code changes related to conductors for general wiring
• Discuss code changes to cutout boxes, junction boxes, and medium voltage conductors
• Understand changes related to armored, metal-clad and mineral insulated cables
• Summarize code changes for reconditioned equipment
• Understand changes related to nonmetallic-sheathed and service-entrance cables
• Describe code changes to underground feeder (UF) cables and intermediate metal conduit (IMC)
• Explain code changes to cable trays and low-voltage suspended ceiling power distribution systems
• Identify code changes related to switches and wiring devices
• Discuss switchboards and luminaires code changes
• Describe code changes related to appliances, electric deicing and snow-melting equipment
• Understand motors, motor circuits and controllers code changes

Mike Ornoski

Mike Ornoski has been with the City of Phoenix since 2004 and in total has 34 years of experience in the electrical and construction industry, Mike Ornoski brings unmatched expertise and leadership to his role with the City of Phoenix Planning & Development Department (PDD) and the Arizona Builders Alliance (ABA).

Mike’s career began with an electrical apprenticeship with the ABA, leading to roles as an electrician, electrical foreman, and owner/operator of an electrical contracting business before transitioning into public service as an Electrical Inspector and later as an Electrical Inspections Field Supervisor with the City of Phoenix.

Since 2014, Mike has managed PDD’s commercial inspection team, which includes specialists in fire, structural, plumbing, mechanical, combination (PBI), and electrical inspections. In this role, he works closely with the development community to ensure projects meet code compliance and progress smoothly.

Mike excels at managing complex construction projects, collaborating with inspectors, developers, contractors, owners, and design professionals to solve problems and keep projects on track. He also has 12 years of teaching electrical code (NEC). Electrical instructor for the Arizona Building Officials (AZBO) teaching commercial, industrial and residential electrical code classes. He is also a contributing publication code review editor for the Soares Grounding and Bonding & One- and Two-Family book publications through Independent Alliance of the Electrical Industry.