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National Electrical Code (NEC) 2020 Practice Test


This practice test contains over 1,000 pages (over 2,200 questions) and includes answer keys. The questions are based on the NEC 2020.


This practice test will improve your knowledge and can significantly reduce your study time. This practice test is an instant PDF download after purchase. You may use the material as long as you need; there are no time restrictions.


Applies to exams/licenses that requires knowledge of the National Electrical Code including: electrician, administrator, wireman, sign, alarm, HVAC, communications, gate & access control, appliance & equipment repair, pump, etc.

The NEC 2020 is part of the National Fire Code, published by the National Fire Protection Association.



Over 100 Articles covered:


  1. Article 90 Introduction
  2. Article 110 Requirements for Electrical Installations
  3. Article 200 Use and Identification of Grounded Conductors
  4. Article 210 Branch Circuits
  5. Article 215 Feeders
  6. Article 220 Branch-Circuit Feeder and Service Calculations
  7. Article 225 Outside Branch Circuits and Feeders
  8. Article 230 Services
  9. Article 240 Overcurrent Protection
  10. Article 250 Grounding and Bonding
  11. Article 280 Surge Arresters Over 1000 Volts
  12. Article 285 Surge-Protective Devices (SPDs), 1000 Volts or Less
  13. Article 300 General Requirements for Wiring Methods and Materials
  14. Article 310 Conductors for General Wiring
  15. Article 312 Cabinets, Cutout Boxes, and Meter Socket Enclosures
  16. Article 314 Outlet, Device, Pull, and Junction Boxes
  17. Article 320 Armored Cable Type AC
  18. Article 322 Flat Cable Assemblies Type FC
  19. Article 324 Flat Conductor Cable Type FCC
  20. Article 326 Integrated Gas Spacer Cable Type IGS
  21. Article 328 Medium Voltage Cable Type MV
  22. Article 330 Metal-Clad Cable Type MC
  23. Article 332 Mineral-Insulated Metal-Sheathed Cable Type MI
  24. Article 334 Nonmetallic-Sheathed Cable Types NM, NMC and NMS
  25. Article 336 Power and Control Tray Cable Type TC
  26. Article 338 Service-Entrance Cable Types SE and USE
  27. Article 340 Underground Feeder and Branch-Circuit Cable Type UF
  28. Article 342 Intermediate Metal Conduit Type IMC
  29. Article 344 Rigid Metal Conduit Type RMC
  30. Article 348 Flexible Metal Conduit Type FMC
  31. Article 350 Liquidtight Flexible Metal Conduit Type LFMC
  32. Article 352 Rigid Polyvinyl Chloride Conduit Type PVC
  33. Article 353 High Density Polyethylene Conduit Type HDPE
  34. Article 354 Nonmetallic Underground Conduit with Conductors Type NUCC
  35. Article 355 Reinforced Thermosetting Resin Conduit Type RTRC
  36. Article 356 Liquidtight Flexible Nonmetallic Conduit Type LFNC
  37. Article 358 Electric Metallic Tubing Type EMT
  38. Article 360 Flexible Metallic Tubing Type FMT
  39. Article 362 Electrical Nonmetallic Tubing Type ENT
  40. Article 366 Auxiliary Gutters
  41. Article 368 Busways
  42. Article 370 Cablebus
  43. Article 372 Cellular Concrete Floor Raceways
  44. Article 374 Cellular Metal Floor Raceways
  45. Article 376 Metal Wireways
  46. Article 378 Nonmetallic Wireways
  47. Article 380 Multioutlet Assembly
  48. Article 382 Nonmetallic Extensions
  49. Article 384 Strut-Type Channel Raceway
  50. Article 386 Surface Metal Raceways
  51. Article 388 Surface Nonmetallic Raceways
  52. Article 390 Underfloor Raceways
  53. Article 392 Cable Trays
  54. Article 393 Low-Voltage Suspended Ceiling Power Distribution Systems
  55. Article 394 Concealed Knob-and-Tube Wiring
  56. Article 396 Messenger-Supported Wiring
  57. Article 398 Open Wiring on Insulators
  58. Article 399 Outdoor Overhead Conductors, over 1000 Volts
  59. Article 400 Flexible Cords and Flexible Cables
  60. Article 402 Fixture Wires
  61. Article 404 Switches
  62. Article 406 Receptacles, Cord Connectors, and Attachment Plugs (Caps)
  63. Article 408 Switchboards, Switchgear, and Panelboards
  64. Article 409 Industrial Control Panels
  65. Article 410 Luminaires, Lampholders, and Lamps
  66. Article 411 Low-Voltage Lighting
  67. Article 422 Appliances
  68. Article 424 Fixed Electric Space-Heating Equipment
  69. Article 425 Fixed Resistance and Electrode Industrial Process Heating Equipment
  70. Article 426 Fixed Outdoor Electric Deicing and Snow-Melting Equipment
  71. Article 427 Fixed Electric Heating Equipment for Pipelines and Vessels
  72. Article 430 Motors, Motor Circuits, and Controllers
  73. Article 440 Air-Conditioning and Refrigerating Equipment
  74. Article 445 Generators
  75. Article 450 Transformers and Transformer Vaults
  76. Article 455 Phase Converters
  77. Article 460 Capacitors
  78. Article 470 Resistors and Reactors
  79. Article 480 Storage Batteries
  80. Article 490 Equipment Over 1000 Volts, Nominal
  81. Article 500 Hazardous Locations Classified
  82. Article 504 Intrinsically Safe Systems
  83. Article 510 Hazardous (Classified) Locations – Specific
  84. Article 511 Commercial Garages, Repair and Storage
  85. Article 513 Aircraft Hangars
  86. Article 514 Motor Fuel Dispensing Facilities
  87. Article 515 Bulk Storage Plants
  88. Article 518 Assembly Occupancies
  89. Article 547 Agricultural Buildings
  90. Article 553 Floating Buildings
  91. Article 590 Temporary Installations
  92. Article 600 Electrical Signs and Outline Lighting
  93. Article 604 Manufactured Wiring Systems
  94. Article 605 Office Furnishings
  95. Article 630 Electric Welders
  96. Article 647 Sensitive Electronic Equipment
  97. Article 650 Pipe Organs
  98. Article 665 Induction and Dielectric Heating Equipment
  99. Article 669 Electroplating
  100. Article 670 Industrial Machinery
  101. Article 675 Electrically Driven or Controlled Irrigation Machines
  102. Article 680 Swimming Pools, Fountains, and Similar Installations
  103. Article 685 Integrated Electrical Systems
  104. Article 690 Solar Photovoltaic (PV) Systems
  105. Article 691 Large-Scale PV Electric Power Production Facility
  106. Article 692 Fuel Cell Systems
  107. Article 694 Wind Electric Systems
  108. Article 695 Fire Pumps
  109. Article 700 Emergency Systems
  110. Article 701 Legally Required Standby Systems
  111. Article 702 Optional Standby Systems
  112. Article 705 Interconnected Electric Power Production Sources
  113. Article 708 Critical Operations Power Systems (COPS)
  114. Article 720 Circuits and Equipment Operating at Less Than 50 Volts
  115. Article 725 Class 1, Class 2, and Class 3 Remote-Control, Signaling and
    Power-Limited Circuits
  116. Article 727 Instrumentation Tray Cable: Type ITC
  117. Article 728 Fire-Resistive Cable Systems
  118. Article 750 Energy Management Systems
  119. Article 760 Fire Alarm Systems
  120. Article 770 Optical Fiber Cables and Raceways
  121. Article 800 Communications Circuits
  122. Article 810 Radio and Television Equipment
  123. Article 820 Community Antenna Television and Radio Distribution Systems
  124. Article 830 Network-Powered Broadband Communications Systems
  125. Article 840 Premises-Powered Broadband Communications Systems

General Practice Test Information:


Our downloadable PDF practice tests are unique and created by hand, by our experienced team. Our practice tests are comprehensive, detailed, and will help you earn your licenses quicker.


We have helped many other tradesmen pass their state contractors license tests. Our practice tests can help you too. If you ever have any questions, please contact us.


Study tips: Our practice tests are organized into sections to mimic the official exam bulletin. Each practice question includes a "reference locator".  You can significantly decrease your studying time by observing which topics/chapters you already know well and the ones you do not.  Once you have identified those, you may choose to spend less time on topics you already know, and focus more on the code that you're not familiar with. Example: If you're studying for a General Building license and are very familiar with "Building Planning and Life Safety", but you tend to miss practice questions from the "Building Envelope" section, then you should focus more on that section. The same method applies to all other license practice tests (plumbing, roofing, electrical, alarm, well, etc)


*Our practice tests are significantly longer than the actual state license tests. This will help you learn more so you can get your license quicker and be a better contractor. The better you are, the safer we all are, and the more money you can make. Many licensed contractors can make over $70,000 per year.

*Our practice tests are not easy. If you can pass most of our practice test, you probably have significant experience and you should pass the actual state license test.

*Only the testing authority or state know the exact questions from the real test, so we provide you an extremely thorough practice test. If we provided a practice test with only 50 questions, that wouldn't help you much, so we won't offer that. Many of our practice tests are well over 1,000 questions! We develop these practice tests professionally and we will only provide you with high quality, comprehensive practice tests.

You need a lengthy and in-depth practice test. Anything less could be a waste of your time and money. We will not waste your time or money by providing short, "cheap", or easy tests. Be confident that you will get a great value with our practice tests. If you ever have any questions, please contact us.