This eight-hour course defines the 2023 National Electrical Code (NEC) commercial and industrial installation requirements. Changes compared to the previous NEC version are also highlighted.

Electricians who complete this course will be able to:

  • Define “Accessible” as it relates to equipment.
  • List the qualities that testing agencies check when examining electrical equipment.
  • Identify the minimum value required for the interrupting rating of a circuit breaker.
  • List the general requirements for providing overcurrent protection to flexible bus systems.
  • Identify when and how PVC, as a complete system, requires support.
  • Explain why an equipment’s terminal temperature rating is used to select the conductor ampacity.
  • Describe when a feeder disconnect requires ground fault circuit interrupter (GFCI) protection.
  • List examples of continuous and non-continuous loads.
  • Calculate the minimum ampacity required of a feeder tap.
  • Describe the purpose of an effective ground-fault current path.
  • Identify when more than one motor is allowed on a branch circuit.
  • Interpret Table 310.12 to size phase conductors for dwelling unit services.
  • List the basic requirements for sizing outlet and device boxes.
  • Describe the proper procedure for installing conductors in conduits.
  • Understand the importance of using switches within their specified ratings and the types of permitted loads on switches.
  • Identify where flexible cords are permitted to be used.
  • Describe the level of detail required for circuit identification.
  • Describe how overcurrent protection protects a motor control center (MCC).
  • Identify when a motor must have a disconnecting means within sight of the motor.
  • Identify installations or activities that require ground fault circuit interrupter (GFCI) protection for personnel.
  • Calculate the minimum ampacity required of feeder supply conductors for an industrial machine.

Approved By: Department of Industrial Relations - Electrician Certification Unit

  • Commercial and Industrial Wiring (2023 NEC)
    • Introduction [6 Activities]
      • 01. Introduction: 90.1 Scope.
      • 02. 90.2 (A) Practical Safeguarding.
      • 03. 90.2 (B) Adequacy.
      • 04. 90.2 (C) Installations Covered.
      • 05. 90.2 (D) Installations Not Covered.
      • 06. 90.3 Code Arrangement.
    • Definitions [10 Activities]
      • 01. Definitions: Article 100 Definitions.
      • 02. 100 Accessible (Readily Accessible).
      • 03. 100 Branch Circuit.
      • 04. 100 Continuous Load.
      • 05. 100 Feeder.
      • 06. 100 Grounded. Grounding.
      • 07. 100 Ground-Fault Protection of Equipment.
      • 08. 100 In Sight From (Within Sight From, Within Sight).
      • 09. 100 Qualified Person.
      • 10. 100 Separately Derived System.
    • Requirements for Electrical Installations [14 Activities]
      • 01. Requirements: 110.3 (A) Examination, Identification, Installation, and Use of Equipment.
      • 02. 110.3 (B) Installation and Use.
      • 03. 110.9 Interrupting Rating.
      • 04. 110.14 (C) Electrical Connections - Temperature Limitations.
      • 05. 110.14 (D) Terminal Connection Torque.
      • 06. 110.18 Arcing Parts.
      • 07. 110.22 Identification of Disconnecting Means.
      • 08. 110.24 Available Fault Rating.
      • View Additional Activities
        • 09. 110.26 (A)(1)(2)(3) Depth, Width, and Height of Working Space.
        • 10. 110.26 (C)(1) and (2) Large Equipment.
        • 11. 110.26 (D) and (E) Illumination of Working Space and Dedicated Equipment Space.
        • 12. Table 110.28 Enclosure Selection.
        • 13. 110.33 Entrance to Enclosures and Access to Work Space.
        • 14. 110.34 (A) Working Space.
    • Branch Circuits [5 Activities]
      • 01. Branch Circuits: 210.18 Rating.
      • 02. 210.8 (B) Ground-Fault Circuit-Interrupter Protection for Personnel.
      • 03. 210.19 Conductors – Minimum Ampacity and Size.
      • 04. 210.21 Outlet Devices.
      • 05. 210.63 Equipment Requiring Servicing.
    • Feeders [2 Activities]
      • 01. Feeders: 215.2 (A)(1) Feeders. Minimum Rating and Size.
      • 02. 215.10 Ground-Fault Protection of Equipment.
    • Outside Branch Circuits and Feeders [3 Activities]
      • 01. Outside Branch Circuits and Feeders: 225.30 Number of Supplies.
      • 02. 225.31 (A) and (B) Disconnecting Means.
      • 03. 235.360 Clearances Over Roadways, Walkways, Rail, Water, and Open Land.
    • Overcurrent Protection [4 Activities]
      • 01. Overcurrent Protection: 240.6 Standard Ampere Ratings.
      • 02. 240.21 (B) Feeder Taps.
      • 03. 240.24 (A) Location in or on Premises. Accessibility.
      • 04. 245.21 Circuit-Interrupting Devices.
    • Grounding and Bonding [10 Activities]
      • 01. Grounding and Bonding: 100 Ground-Fault Current Path, Effective (Effective Ground-Fault Current Path).
      • 02. 250.30 (A) Grounding Separately Derived AC Systems, Grounded Systems.
      • 03. 250.30 (B) and (C) Grounding Separately Derived AC Systems, Ungrounded Systems and Outdoor Source.
      • 04. 250.32 Buildings or Structures Supplied by Feeder(s) or Branch Circuit(s).
      • 05. 250.50 Grounding Electrode System.
      • 06. 250.52 Grounding Electrodes.
      • 07. 250.64 Grounding Electrode Conductor Installation.
      • 08. 250.66 Size of Alternating-Current Grounding Electrode Conductor.
      • 09. 250.118 Types of Equipment Grounding Conductors.
      • 10. 250.122 (F) Size of Equipment Grounding Conductors in Parallel.
    • Wiring Methods [4 Activities]
      • 01. Wiring Methods: 300.3 (B) & 300.3(B)(1) Conductors of the Same Circuit & Paralleled Installations.
      • 02. 300.4 (G) Insulated Fittings.
      • 03. 300.5 (A) Minimum Cover Requirements.
      • 04. 300.14 Length of Free Conductors at Outlets, Junctions, and Switch Points.
    • Conductors for General Wiring [3 Activities]
      • 01. Conductors for General Wiring: 310.10 Uses Permitted (A) through (F).
      • 02. 310.10 (G) Conductors in Parallel.
      • 03. 310.12 Single-Phase Dwelling Service and Feeders.
    • Outlet, Device, Pull, and Junction Boxes [3 Activities]
      • 01. Outlet, Device, Pull and Junction Boxes: 314.24 Dimensions of Boxes.
      • 02. 315.16 Marking for Type MV Cables and Conductors & 315.17 Marking for Type MV Cable Joints and Terminations.
      • 03. 315.32 Uses Permitted for Type Medium Voltage Cables, Cable Joints, and Terminations.
    • Conduit and Raceways [7 Activities]
      • 01. Conduit and Raceways: 371.17 Overcurrent Protection of Flexible Bus Systems.
      • 02. 371.18 Flexible Bus Systems Installation.
      • 03. 314.16 Box Fill Calculations.
      • 04. 398.15 Exposed Work.
      • 05. 315.44 Shielding & 315.45 Shielding at Type MV Cable Joints and Terminations.
      • 06. 352.10 Uses Permitted for Rigid Polyvinyl Chloride Conduits.
      • 07. 352.44 Expansion Fittings.
    • Switches and Receptacles [3 Activities]
      • 01. Flexible Cords and Cables: 404.14 Rating and Use of Switches.
      • 02. 406.3 Receptacle Rating and Type.
      • 03. 406.4 (D) Receptacle Replacements.
    • Switchboards and Panelboards [4 Activities]
      • 01. Switchboards and Panelboards: 406.12 Tamper-Resistant Receptacles.
      • 02. 424.93 Installation of Electric Radiant Heating Panels and Heating Panel Sets.
      • 03. 410.10 Luminaires in Specific Locations.
      • 04. 410.10 (A) through (F) Installation.
    • Motors, Motor Circuits, and Controllers [12 Activities]
      • 01. Motors, Motor Circuits, and Controllers: 430.6 Conductor Ampacity and Motor Rating Determination.
      • 02. 430.7 Marking on Motors and Multimotor Equipment & 430.8 Marking on Controllers.
      • 03. 430.22 Single Motor.
      • 04. 430.24 Several Motors or a Motor(s) and Other Load(s).
      • 05. 430.32 Continuous Duty Motors – Overload Protection.
      • 06. 430.52 Rating or Setting for Individual Motor Circuit.
      • 07. 430.53 Several Motors or Loads on One Branch Circuit.
      • 08. 430.94 Overcurrent Protection.
      • View Additional Activities
        • 09. 430.102 (A) Disconnecting Means Location. Controller.
        • 10. 430.102 (B) Disconnecting Means Location. Motor.
        • 11. 430.107 Readily Accessible.
        • 12. 430.109 Type.
    • Generators [2 Activities]
      • 01. Generators: 445.13 (A) Ampacity of Conductors. General. Conductor Ampacity.
      • 02. 445.18 Disconnecting Means. 445.19 Emergency Shutdown of Prime Mover.
    • Transformers [3 Activities]
      • 01. Transformers: 450.1 Scope.
      • 02. Table 450.3 (B) Maximum Rating of Overcurrent Protection for Transformers 1000 Volts and Less.
      • 03. 450.13 (A)&(B) Accessibility. Open and Hollow Space Installations.
    • Temporary Installations [2 Activities]
      • 01. Temporary Wiring: 590.3 and 590.4 (D) Time Constraints. Receptacles.
      • 02. 590.6 (A) (1) GFCI Protection for Personnel.
    • Industrial Machinery [3 Activities]
      • 01. Industrial Machinery: 670.3 Machine Nameplate Data.
      • 02. 670.4 (A) Supply Conductors and Overcurrent Protection – Size.
      • 03. 670.4 (B) & (C) Disconnecting Means and Overcurrent Protection.
  • Course Completion
    • Mandatory Questionnaire
    • Certificate of Completion
Instructor Image

Instructor Bio

Jerry Durham

Jerry previously served the state of North Carolina as a Level III electrical inspector and provided state-approved electrical training for electrical inspectors at both Alamance County and Guilford County (NC) Community Colleges. Jerry taught the Kentucky state-approved four-year electrical apprenticeship programs offered by the Independent Electrical Contractors (IEC) Trade School and Associated Builders and Contractors (ABC) Trade School, and served the state of Kentucky as a Master Electrician and Louisville Metro Code Enforcement Officer. Jerry is a Certified Distance Education Instructor (CDEI) and NCCER Core and Electrical Curriculum certified instructor. Jerry currently holds North Carolina and ICC electrical inspector accreditations and is recognized by the state of Washington as an approved electrical administrator.

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