The National Electrical Code (NEC), published by the National Fire Protection Association (NFPA), is organized into chapters and articles that cover various aspects of electrical installations. Below is a list of chapters and their corresponding articles in the 2020 edition of the NEC. Please note that the code is periodically updated, and newer editions may have revisions or additions to these chapters and articles.

Chapter 1 – General

  • Article 100 – Definitions
  • Article 110 – Requirements for Electrical Installations

Chapter 2 – Wiring and Protection

  • Article 200 – Use and Identification of Grounded Conductors
  • Article 210 – Branch Circuits
  • Article 215 – Feeders
  • Article 220 – Branch-Circuit, Feeder, and Service Calculations
  • Article 225 – Outside Branch Circuits and Feeders
  • Article 230 – Services
  • Article 240 – Overcurrent Protection
  • Article 250 – Grounding and Bonding
  • Article 280 – Surge Arresters
  • Article 285 – Transient Voltage Surge Suppressors

Chapter 3 – Wiring Methods and Materials

  • Article 300 – General Requirements for Wiring Methods and Materials
  • Article 310 – Conductors for General Wiring
  • Article 312 – Cabinets, Cutout Boxes, and Meter Socket Enclosures
  • Article 314 – Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures
  • Article 320 – Armored Cable: Type AC
  • Article 322 – Flat Cable Assemblies: Type FC
  • Article 324 – Flat Conductor Cable: Type FCC
  • Article 326 – Integrated Gas Spacer Cable: Type IGS
  • Article 328 – Medium Voltage Cable: Type MV
  • Article 330 – Metal-Clad Cable: Type MC
  • Article 332 – Mineral-Insulated, Metal-Sheathed Cable: Type MI
  • Article 334 – Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS
  • Article 336 – Power and Control Tray Cable: Type TC
  • Article 338 – Service-Entrance Cable: Types SE and USE
  • Article 340 – Underground Feeder and Branch-Circuit Cable: Type UF
  • Article 342 – Intermediate Metal Conduit: Type IMC
  • Article 344 – Rigid Metal Conduit: Type RMC
  • Article 348 – Flexible Metal Conduit: Type FMC
  • Article 350 – Liquidtight Flexible Metal Conduit: Type LFMC
  • Article 352 – Rigid Polyvinyl Chloride Conduit: Type PVC
  • Article 353 – High Density Polyethylene Conduit: Type HDPE Conduit
  • Article 354 – Nonmetallic Underground Conduit with Conductors: Type NUCC
  • Article 355 – Reinforced Thermosetting Resin Conduit: Type RTRC
  • Article 356 – Liquidtight Flexible Nonmetallic Conduit: Type LFNC
  • Article 358 – Electrical Metallic Tubing: Type EMT
  • Article 360 – Flexible Metallic Tubing: Type FMT
  • Article 362 – Electrical Nonmetallic Tubing: Type ENT
  • Article 366 – Auxiliary Gutters
  • Article 368 – Busways
  • Article 370 – Cablebus
  • Article 372 – Cellular Concrete Floor Raceways
  • Article 374 – Cellular Metal Floor Raceways
  • Article 376 – Metal Wireways
  • Article 378 – Nonmetallic Wireways
  • Article 380 – Multioutlet Assembly
  • Article 382 – Nonmetallic Extensions
  • Article 384 – Strut-Type Channel Raceway
  • Article 386 – Surface Metal Raceways
  • Article 388 – Surface Nonmetallic Raceways
  • Article 390 – Underfloor Raceways
  • Article 392 – Cable Trays
  • Article 394 – Concealed Knob-and-Tube Wiring
  • Article 396 – Messenger Supported Wiring
  • Article 398 – Open Wiring on Insulators
  • Article 399 – Outdoor Overhead Conductors over 600 Volts

Chapter 4 – Equipment for General Use

  • Article 400 – Flexible Cords and Cables
  • Article 402 – Fixture Wires
  • Article 404 – Switches
  • Article 406 – Receptacles, Cord Connectors, and Attachment Plugs (Caps)
  • Article 408 – Switchboards and Panelboards
  • Article 410 – Luminaires, Lampholders, and Lamps
  • Article 411 – Lighting Systems Operating at 30 Volts or Less
  • Article 422 – Appliances
  • Article 424 – Fixed Electric Space-Heating Equipment
  • Article 426 – Fixed Outdoor Electric Deicing and Snow-Melting Equipment
  • Article 427 – Fixed Electric Heating Equipment for Pipelines and Vessels
  • Article 430 – Motors, Motor Circuits, and Controllers
  • Article 440 – Air-Conditioning and Refrigerating Equipment
  • Article 445 – Generators
  • Article 450 – Transformers and Transformer Vaults (Including Secondary Ties)
  • Article 455 – Phase Converters
  • Article 460 – Capacitors
  • Article 470 – Resistors and Reactors
  • Article 480 – Storage Batteries
  • Article 490 – Equipment Over 600 Volts, Nominal
  • Article 494 – Fire Pump Controllers
  • Article 504 – Intrinsically Safe Systems
  • Article 505 – Class I Locations
  • Article 506 – Class II Locations
  • Article 507 – Class III Locations
  • Article 510 – Hazardous (Classified) Locations
  • Article 511 – Commercial Garages, Repair and Storage
  • Article 514 – Motor Fuel Dispensing Facilities
  • Article 517 – Health Care Facilities
  • Article 518 – Places of Assembly
  • Article 520 – Theaters, Audience Areas of Motion Picture and Television Studios, Performance Areas, and Similar Locations
  • Article 522 – Control Systems for Permanent Amusement Attractions
  • Article 525 – Carnivals, Circuses, Fairs, and Similar Events
  • Article 530 – Motion Picture and Television Studios and Similar Locations
  • Article 540 – Motion Picture Projection Rooms
  • Article 545 – Manufactured Buildings
  • Article 547 – Agricultural Buildings
  • Article 551 – Recreational Vehicles and Recreational Vehicle Parks
  • Article 552 – Park Trailers
  • Article 553 – Floating Buildings
  • Article 555 – Marinas and Boatyards
  • Article 590 – Temporary Installations

Chapter 5 – Special Occupancies

  • Article 500 – Hazardous (Classified) Locations, Classes I, II, and III, Divisions 1 and 2
  • Article 501 – Class I Locations
  • Article 502 – Class II Locations
  • Article 503 – Class III Locations
  • Article 504 – Intrinsically Safe Systems
  • Article 505 – Class I Locations
  • Article 506 – Class II Locations
  • Article 507 – Class III Locations
  • Article 510 – Hazardous (Classified) Locations

Chapter 6 – Special Equipment

  • Article 600 – Electric Signs and Outline Lighting
  • Article 604 – Manufactured Wiring Systems
  • Article 605 – Office Furnishings
  • Article 610 – Cranes and Hoists
  • Article 620 – Elevators, Dumbwaiters, Escalators, Moving Walks, Platform Lifts, and Stairway Chairlifts
  • Article 625 – Electric Vehicle Charging System
  • Article 626 – Low-Voltage Suspended Ceiling Power Distribution Systems
  • Article 630 – Electric Welders
  • Article 640 – Audio Signal Processing, Amplification, and Reproduction Equipment
  • Article 645 – Information Technology Equipment
  • Article 647 – Sensitive Electronic Equipment
  • Article 650 – Pipe Organs
  • Article 660 – X-Ray Equipment
  • Article 665 – Induction and Dielectric Heating Equipment
  • Article 668 – Electrolytic Cells
  • Article 669 – Electroplating
  • Article 670 – Industrial Machinery
  • Article 675 – Electrically Driven or Controlled Irrigation Machines
  • Article 680 – Swimming Pools, Fountains, and Similar Installations
  • Article 685 – Integrated Electrical Systems
  • Article 690 – Solar Photovoltaic (PV) Systems
  • Article 691 – Large-Scale Photovoltaic (PV) Electric Power Production Facility

Chapter 7 – Special Conditions

  • Article 700 – Emergency Systems
  • Article 701 – Legally Required Standby Systems
  • Article 702 – Optional Standby Systems
  • Article 705 – Interconnected Electric Power Production Sources
  • Article 706 – Energy Storage Systems
  • Article 710 – Stand-Alone Systems
  • Article 720 – Circuits and Equipment Operating at Less Than 50 Volts
  • Article 725 – Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits
  • Article 727 – Instrumentation Tray Cable: Type ITC
  • Article 728 – Fire-Resistive Cable: Type MI Cables
  • Article 750 – Energy Management Systems
  • Article 770 – Optical Fiber Cables and Raceways
  • Article 800 – Communications Circuits
  • Article 810 – Radio and Television Equipment
  • Article 820 – Community Antenna Television and Radio Distribution Systems
  • Article 830 – Network-Powered Broadband Communications Systems
  • Article 840 – Premises-Powered Broadband Communications Systems
  • Article 845 – Information Technology Equipment
  • Article 850 – Mobile Homes, Manufactured Homes, and Mobile Home Parks
  • Article 852 – Mobile Home Marking
  • Article 854 – Manufactured Homes
  • Article 855 – Floating Buildings
  • Article 860 – Transformer Vaults (Including Secondary Ties)
  • Article 870 – Fire Alarm Systems
  • Article 880 – Public Emergency Reporting Systems
  • Article 890 – Radio and Television Equipment

Please note that the list above provides an overview of the chapters and articles in the 2020 NEC. The NEC is a comprehensive document, and each article addresses specific electrical requirements and safety provisions for various applications and environments. Depending on your specific needs and projects, you may refer to one or more articles within the code. Always ensure that you are using the most current edition of the NEC and comply with any local amendments or regulations in your jurisdiction.