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National Electrical Code® 2026 Handbook

By National Fire Protection Association

1st Edition © 2026
Discipline:Trades
Course:Building Trades/Construction
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The NFPA 70, National Electrical Code (NEC) Handbook, is the most practical and powerful resource today for electrical design and installation. You get the complete text of the latest National Electrical Code, plus a range of features providing insights and guidance on its application.

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About this product

The NFPA 70, National Electrical Code (NEC) Handbook, is the most practical and powerful resource today for electrical design and installation. You get the complete text of the latest National Electrical Code, plus a range of features providing insights and guidance on its application.

Integrated expert commentary positioned in line with NEC text.

Summary of Technical Changes table demonstrating where and why code changes occurred between editions.

A cross-reference feature to help you quickly find related information in other articles or sections.

Calculation examples provide scenarios that show how certain requirements can be applied.

Table of contents

Chapters

Preface
About the Editors
Summary of Technical Changes
Article 90 Introduction
Chapter 1 General
Part I. General
Part II. Not Over 1000 Volts ac, 1500 Volts dc, Nominal
Part III. Over 1000 Volts ac, 1500 Volts dc, Nominal
Part IV. Tunnel Installations over 1000 Volts ac, 1500 Volts dc, Nominal
Part V. Manholes and Other Electrical Enclosures Intended for Personnel Entry
Article 120 Branch-Circuit, Feeder, and Service Load Calculations
Part I. General
Part II. Branch-Circuit Load Calculations
Part III. Feeder and Service Load Calculations
Part IV. Optional Feeder and Service Load Calculations
Part V. Farm Load Calculations
Part VI. Health Care Facilities
Part VII. Marinas, Boatyards, Floating Buildings, and Docking Facilities
Part VIII. Recreational Vehicle Parks
Part IX. Mobile and Manufactured Home Calculations
Article 130 Energy Management Systems
Part I. General
Part II. Power Control Systems (PCS)
Chapter 2 Wiring and Protection
Part I. General
Part II. Branch-Circuit Ratings
Part III. Required Outlets
Article 215 Feeders
Article 225 Outside Branch Circuits and Feeders
Part I. General
Part II. Buildings or Other Structures Supplied by a Feeder(s) or Branch Circuit(s)
Article 230 Services
Part I. General
Part II. Overhead Service Conductors
Part III. Underground Service Conductors
Part IV. Service-Entrance Conductors
Part V. Service Equipment – General
Part VI. Service Equipment – Disconnecting Means
Part VII. Service Equipment – Overcurrent Protection
Article 240 Overcurrent Protection
Part I. General
Part II. Location
Part III. Enclosures
Part IV. Disconnecting and Guarding
Part V. Plug Fuses, Fuseholders, and Adapters
Part VI. Cartridge Fuses and Fuseholders
Part VII. Circuit Breakers
Part VIII. Supervised Industrial Installations
Article 242 Overvoltage Protection
Part I. General
Part II. Surge-Protective Devices (SPDs), not over 1000 Volts ac, 1500 Volts dc, Nominal
Part III. Surge Arresters, Over 1000 Volts
Article 245 Overcurrent Protection for Systems Rated Over 1000 Volts ac, 1500 Volts dc, Nominal
Article 250 Grounding and Bonding
Part I. General
Part II. System Grounding
Part III. Grounding Electrode System and Grounding Electrode Conductor
Part IV. Enclosure, Raceway, and Service Cable Connections
Part V. Bonding
Part VI. Equipment Grounding and Equipment Grounding Conductors
Part VII. Methods of Equipment Grounding Conductor Connections
Part VIII. Direct-Current (dc) Systems
Part IX. Instruments, Meters, and Relays
Article 265 Branch Circuits Over 1000 Volts ac, 1500 Volts dc, Nominal
Part I. General
Part II. Branch-Circuit Ratings
Part III. Required Outlets
Article 266 Feeders Over 1000 Volts ac, 1500 Volts dc, Nominal
Article 267 Outside Branch Circuits and Feeders Over 1000 Volts ac, 1500 Volts dc, Nominal
Part I. General
Part II. Buildings or Other Structures Supplied by a Feeder(s) or Branch Circuit(s)
Article 268 Services Over 1000 Volts ac, 1500 Volts dc, Nominal
Part I. General
Part II. Overhead Service Conductors
Part III. Underground Service Conductors
Part IV. Service-Entrance Conductors
Part V. Service Equipment – General
Part VI. Service Equipment – Disconnecting Means
Part VII. Service Equipment – Overcurrent Protection
Article 270 Grounding and Bonding of Systems over 1000 Volts ac, 1500 Volts dc, Nominal
Part I. General
Part II. System Grounding
Part III. Grounding Electrode System and Grounding Electrode Conductor
Part IV. Enclosure, Raceway, and Service Cable Connections
Part V. Bonding
Part VI. Equipment Grounding and Equipment Grounding Conductors
Part VII. Methods of Equipment Grounding Conductor Connections
Part VIII. Direct-Current (dc) Systems
Part IX. Instruments, Meters, and Relays
Chapter 3 Wiring Methods and Materials
Part I. General
Part II. Construction Specifications
Part III. Installation
Article 312 Cabinets, Cutout Boxes, and Meter Socket Enclosures
Part I. General
Part II. Construction Specifications
Article 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures
Part I. General
Part II. Installation
Part III. Pull and Junction Boxes, Conduit Bodies, and Handhole Enclosures for Use on Systems over 1000 Volts ac, 1500 Volts dc, Nominal
Part IV. Construction Specifications
Article 315 Medium Voltage Conductors, Cable, Cable Joints, and Cable Terminations
Part I. General
Part II. Construction Specifications
Part III. Installation
Part IV. Ampacities
Article 320 Armored Cable: Type AC
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 322 Flat Cable Assemblies: Type FC
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 324 Flat Conductor Cable: Type FCC
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 326 Integrated Gas Spacer Cable: Type IGS
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 330 Metal-Clad Cable: Type MC
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 332 Mineral-Insulated, Metal-Sheathed Cable: Type MI
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 334 Nonmetallic-Sheathed Cable: Types NM and NMC
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 335 Instrumentation Tray Cable: Type ITC
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 336 Power and Control Tray Cable: Type TC
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 337 Type P Cable
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 338 Service-Entrance Cable: Types SE and USE
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 340 Underground Feeder and Branch-Circuit
Cable: Type UF
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 342 Intermediate Metal Conduit (IMC)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 344 Rigid Metal Conduit (RMC)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 348 Flexible Metal Conduit (FMC)
Part I. General
Part II. Installation
Article 350 Liquidtight Flexible Metal Conduit (LFMC)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 352 Rigid Polyvinyl Chloride Conduit (PVC)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 353 High Density Polyethylene Conduit (HDPE Conduit)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 354 Nonmetallic Underground Conduit with Conductors (NUCC)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 355 Reinforced Thermosetting Resin Conduit (RTRC)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 356 Liquidtight Flexible Nonmetallic Conduit (LFNC)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 358 Electrical Metallic Tubing (EMT)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 360 Flexible Metallic Tubing (FMT)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 362 Electrical Nonmetallic Tubing (ENT)
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 366 Auxiliary Gutters
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 368 Busways
Part I. General
Part II. Installation
Part III. Construction
Part IV. Requirements for Over 1000 Volts ac,
1500 Volts dc, Nominal
Article 369 Insulated Bus Pipe (IBP)/Tubular Covered Conductors (TCC) Systems
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 370 Cablebus
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 371 Flexible Bus Systems
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 372 Cellular Concrete Floor Raceways
Part I. General
Part II. Installations
Article 374 Cellular Metal Floor Raceways
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 376 Metal Wireways
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 378 Nonmetallic Wireways
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 380 Multioutlet Assembly
Part I. General
Part II. Installation
Article 382 Nonmetallic Extensions
Part I. General
Part II. Installation
Part III. Construction Specifications (Concealable Nonmetallic Extensions Only)
Article 384 Strut-Type Channel Raceway
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 386 Surface Metal Raceways
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 388 Surface Nonmetallic Raceways
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 390 Underfloor Raceways
Part I. General
Part II. Installation
Article 392 Cable Trays
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 393 Low-Voltage Suspended Ceiling Power Distribution Systems
Part I. General
Part II. Installation
Part III. Construction Specifications .............
Article 394 Concealed Knob-and-Tube Wiring
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 396 Messenger-Supported Wiring
Part I. General
Part II. Installation
Article 398 Open Wiring on Insulators
Part I. General
Part II. Installation
Part III. Construction Specifications
Chapter 4 Equipment for General Use
Part I. General
Part II. Construction Specifications
Part III. Portable Cables Over 600 Volts, up to 2000 Volts, Nominal
Part IV. Portable Power Feeder Cables Over 2000 Volts, Nominal
Article 402 Fixture Wires
Article 404 Switches
Part I. General
Part II. Construction Specifications
Article 406 Wiring Devices
Part I. General
Part II. Receptacles, Cord Connectors, and Attachment Plugs (Caps)
Part III. General-Use Snap Switches, Dimmers, and Electronic Control Switches
Article 408 Switchboards, Switchgear, and Panelboards
Part I. General
Part II. Switchboards and Switchgear
Part III. Panelboards
Part IV. Construction Specifications
Article 409 Industrial Control Panels
Part I. General
Part II. Installation
Part III. Construction Specifications
Article 410 Luminaires, Lampholders, and Lamps
Part I. General
Part II. Luminaire Locations
Part III. Luminaire Outlet Boxes, Canopies, and Pans
Part IV. Luminaire Supports
Part V. Grounding
Part VI. Wiring of Luminaires
Part VII. Construction of Luminaires
Part VIII. Installation of Lampholders
Part IX. Lamps and Auxiliary Equipment
Part X. Special Provisions for Flush and Recessed Luminaires
Part XI. Special Provisions for Electric-Discharge Lighting Systems of 1000 Volts or Less
Part XII. Special Provisions for Electric-Discharge Lighting Systems of More Than 1000 Volts
Part XIII. Lighting Track
Part XIV. Decorative Lighting and Similar Accessories
Part XV. Special Provisions for Horticultural Lighting Equipment
Part XVI. Special Provisions for Germicidal Irradiation Luminaires
Article 411 Low-Voltage Lighting
Article 422 Appliances
Part I. General
Part II. Installation
Part III. Disconnecting Means
Part IV. Construction
Part V. Marking
Article 424 Fixed Electric Space-Heating Equipment
Part I. General
Part II. Installation
Part III. Control and Protection of Fixed Electric Space-Heating Equipment
Part IV. Marking of Heating Equipment
Part V. Electric Space-Heating Cables
Part VI. Duct Heaters
Part VII. Resistance-Type Boilers
Part VIII. Electrode-Type Boilers
Part IX. Electric Radiant Heating Panels and Heating Panel Sets
Part X. Low-Voltage Fixed Electric Space-Heating Equipment
Article 425 Fixed Resistance and Electrode Industrial Process Heating Equipment
Part I. General
Part II. Installation
Part III. Control and Protection of Fixed Industrial Process Heating Equipment
Part IV. Marking of Heating Equipment
Part V. Fixed Industrial Process Duct Heaters
Part VI. Fixed Industrial Process Resistance-Type Boilers
Part VII. Fixed Industrial Process Electrode-Type Boilers
Article 426 Fixed Outdoor Electric Deicing and Snow-Melting Equipment
Part I. General
Part II. Installation
Part III. Resistance Heating Elements
Part IV. Impedance Heating
Part V. Skin-Effect Heating
Part VI. Conductive Pavement Heating Systems
Part VII. Control and Protection
Article 427 Fixed Electric Heating Equipment for Pipelines, Vessels, and Other Applications for Trace Heating
Part I. General
Part II. Installation
Part III. Resistance Heating Elements
Part IV. Impedance Heating
Part V. Induction Heating
Part VI. Skin-Effect Heating
Part VII. Control and Protection
Article 430 Motors, Motor Circuits, and Controllers
Part I. General
Part II. Motor Circuit Conductors
Part III. Motor and Branch-Circuit Overload Protection
Part IV. Motor Branch-Circuit Short-Circuit and Ground-Fault Protection
Part V. Motor Feeder Short-Circuit and Ground-Fault Protection
Part VI. Motor Control Circuits
Part VII. Motor Controllers
Part VIII. Motor Control Centers
Part IX. Disconnecting Means
Part X. Adjustable-Speed Drive Systems
Part XI. Over 1000 Volts ac, 1500 Volts dc, Nominal
Part XII. Protection of Live Parts – All Voltages
Part XIII. Grounding – All Voltages
Part XIV. Tables
Article 440 Air-Conditioning and Refrigerating Equipment
Part I. General
Part II. Disconnecting Means
Part III. Branch-Circuit Short-Circuit and Ground-Fault Protection
Part IV. Circuit Conductors
Part V. Controllers for Motor-Compressors
Part VI. Motor-Compressor and Branch-Circuit Overload Protection
Part VII. Room Air Conditioners
Article 445 Generators
Article 450 Transformers and Transformer Vaults (Including Secondary Ties)
Part I. General
Part II. Installation
Part III. Transformer Vaults
Article 455 Phase Converters
Part I. General
Part II. Specific Provisions Applicable to Different Types of Phase Converters
Article 460 Capacitors
Part I. General
Part II. 1000 Volts, Nominal, or Less
Part III. Over 1000 Volts, Nominal
Article 470 Resistors and Reactors
Part I. General
Part II. 1000 Volts, Nominal, or Less
Part III. Over 1000 Volts, Nominal
Article 480 Stationary Batteries
Article 495 Equipment Over 1000 Volts ac, 1500 Volts dc, Nominal
Part I. General
Part II. Equipment – Specific Provisions
Part III. Equipment – Switchgear, Substations, and Industrial Control Assemblies
Part IV. Mobile and Portable Equipment
Part V. Boilers
Part VI. Equipment with Insulating Liquids
Part VII. Equipment Vaults
Chapter 5 Specific Occupancies and Locations
Part I. General
Part II. Wiring
Part III. Equipment
Article 502 Class II Locations
Part I. General
Part II. Wiring
Part III. Equipment
Article 503 Class III Locations
Part I. General
Part II. Wiring
Part III. Equipment
Article 504 Intrinsically Safe Systems
Article 505 Zone 0, 1, and 2 Locations
Article 506 Zone 20, 21, and 22 Locations for Combustible Dusts or Ignitible Fibers/Flyings
Article 511 Commercial Garages, Repair and Storage
Article 512 Cannabis Oil Equipment and Cannabis Oil Systems Using Flammable Materials
Part I. General
Part II. Wiring.
Part III. Equipment
Article 513 Aircraft Hangars
Article 514 Motor Fuel Dispensing Facilities
Article 515 Bulk Storage Plants
Article 516 Spray Application, Dipping, Coating, and Printing Processes Using Flammable or Combustible Materials
Part I. General
Part II. Open Containers
Part III. Spray Application Processes
Part IV. Spray Application Operations in Membrane Enclosures
Part V. Printing, Dipping, and Coating Processes
Article 517 Health Care Facilities
Part I. General
Part II. Wiring and Protection
Part III. Essential Electrical System (EES)
Part IV. Inhalation Anesthetizing Locations
Part V. Diagnostic Imaging and Treatment Equipment
Part VI. Communications, Signaling Systems, Data Systems, Fire Alarm Systems, and Systems Less Than 120 Volts, Nominal
Part VII. Isolated Power Systems
Article 518 Assembly Occupancies
Article 520 Theaters, Audience Areas of Motion Picture and Television Studios, Performance Areas, and Similar Locations
Part I. General
Part II. Fixed Stage Switchboards
Part III. Fixed Stage Equipment Other Than Switchboards
Part IV. Portable Switchboards on Stage
Part V. Portable Stage Equipment Other Than Switchboards
Part VI. Dressing Rooms, Dressing Areas, and Makeup Areas
Part VII. Equipment Grounding Conductor
Article 522 Control Systems for Permanent Amusement Attractions
Part I. General
Part II. Control Circuits
Part III. Control Circuit Wiring Methods
Article 525 Carnivals, Circuses, Fairs, and Similar Events
Part I. General
Part II. Power Sources
Part III. Wiring Methods
Part IV. Equipment Grounding and Bonding
Article 530 Motion Picture and Television Studios and Remote Locations
Part I. General
Part II. Portable Equipment In Production Areas of Studios and Remote Locations
Part III. Portable Equipment in Support Areas
Part IV. Dressing Rooms
Part V. Portable Substations
Article 540 Motion Picture Projection Rooms
Part I. General
Part II. Equipment and Projectors of the Professional Type
Part III. Nonprofessional Projectors
Article 545 Manufactured Buildings and Relocatable Structures
Part I. General
Part II. Relocatable Structures
Article 547 Agricultural Buildings
Part I. General
Part II. Installations
Part III. Distribution and Equipotential Plane
Article 550 Mobile Homes, Manufactured Homes, and Mobile Home Parks
Part I. General
Part II. Mobile and Manufactured Homes
Part III. Interconnected Sections of Mobile or Manufactured Home Units
Part IV. Services and Feeders
Article 551 Recreational Vehicles and Recreational Vehicle Parks
Part I. General
Part II. Combination Electrical Systems
Part III. Other Power Sources
Part IV. Nominal 120-Volt or 120/240-Volt Systems
Part V. Factory Tests
Part VI. Recreational Vehicle Parks
Article 552 Park Trailers
Part I. General
Part II. Low-Voltage Systems
Part III. Combination Electrical Systems
Part IV. Nominal 120-Volt or 120/240-Volt Systems
Part V. Factory Tests
Article 555 Marinas, Boatyards, Floating Buildings, and Docking Facilities
Part I. General
Part II. Marinas, Boatyards, and Docking Facilities
Part III. Floating Buildings
Article 590 Temporary Installations
Chapter 6 Specific Equipment
Part I. General
Part II. Field-Installed Skeleton Tubing, Outline Lighting, and Secondary Wiring
Article 604 Manufactured Wiring Systems
Article 605 Office Furnishings
Article 610 Cranes and Hoists
Part I. General
Part II. Wiring
Part III. Contact Conductors
Part IV. Disconnecting Means
Part V. Overcurrent Protection
Part VI. Control
Part VII. Grounding and Bonding
Article 620 Elevators, Dumbwaiters, Escalators, Moving Walks, Platform Lifts, and Stairway Chairlifts
Part I. General
Part II. Conductors
Part III. Wiring
Part IV. Installation of Conductors
Part V. Traveling Cables
Part VI. Disconnecting Means and Control
Part VII. Overcurrent Protection
Part VIII. Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces
Part IX. Grounding and Bonding
Part X. Emergency and Standby Power Systems
Article 624 Electric Self-Propelled Vehicle Power Transfer Systems (ESVSEs)
Part I. General
Part II. Equipment Construction
Part III. Installation
Part IV. Wireless Power Transfer Equipment
Article 625 Electric Vehicle Power Transfer System
Part I. General
Part II. Equipment Construction
Part III. Installation
Part IV. Wireless Power Transfer Equipment
Article 626 Electrified Truck Parking Spaces
Part I. General
Part II. Electrified Truck Parking Space Electrical Wiring Systems
Part III. Electrified Truck Parking Space Supply Equipment
Part IV. Transport Refrigerated Units (TRUs)
Article 630 Electric Welders
Part I. General
Part II. Arc Welders
Part III. Resistance Welders
Part IV. Welding Cable
Article 640 Audio Signal Processing, Amplification, and Reproduction Equipment
Part I. General
Part II. Permanent Audio System Installations
Part III. Portable and Temporary Audio System Installations
Article 645 Information Technology Equipment
Article 646 Modular Data Centers
Part I. General
Part II. Equipment
Part III. Lighting
Part IV. Workspace
Article 647 Sensitive Electronic Equipment
Article 650 Pipe Organs
Article 660 X-Ray Equipment
Part I. General
Part II. Control
Part III. Transformers and Capacitors
Part IV. Guarding and Grounding
Article 665 Induction and Dielectric Heating Equipment
Part I. General
Part II. Guarding, Grounding, and Labeling
Article 668 Electrolytic Cells
Article 669 Electroplating
Article 670 Industrial Machinery
Article 675 Electrically Driven or Controlled Irrigation Machines
Part I. General
Part II. Center Pivot Irrigation Machines
Article 680 Swimming Pools, Fountains, and Similar Installations
Part I. General
Part II. Permanently Installed Pools
Part III. Storable Pools, Storable Spas, Storable Hot Tubs, and Storable Immersion Pools
Part IV. Permanently Installed and Self-Contained Spas and Hot Tubs and Permanently Installed Immersion Pools
Part V. Fountains
Part VI. Pools and Tubs for Therapeutic Use
Part VII. Hydromassage Bathtubs
Part VIII. Electrically Powered Pool Lifts
Article 682 Natural and Artificially Made Bodies of Water
Part I. General
Part II. Installation
Part III. Grounding and Bonding
Article 685 Integrated Electrical Systems
Part I. General
Part II. Orderly Shutdown
Article 690 Solar Photovoltaic (PV) Systems
Part I. General
Part II. Circuit Requirements
Part III. Disconnecting Means
Part IV. Wiring Methods and Materials
Part V. Grounding and Bonding
Part VI. Source Connections
Article 691 Large-Scale Photovoltaic (PV) Electric Supply Stations
Article 692 Fuel Cell Systems
Part I. General
Part II. Circuit Requirements
Part III. Disconnecting Means
Part IV. Wiring Methods
Part V. Marking
Part VI. Connection to Other Circuits
Article 694 Wind Electric Systems
Part I. General
Part II. Circuit Requirements
Part III. Disconnecting Means
Part IV. Wiring Methods
Part V. Grounding and Bonding
Part VI. Marking
Part VII. Connection to Other Sources
Article 695 Fire Pumps
Chapter 7 Specific Conditions and Systems
Part I. General
Part II. Circuit Wiring
Part III. Sources of Power
Part IV. Emergency System Circuits for Lighting and Power
Part V. Control – Emergency Lighting Circuits
Part VI. Overcurrent Protection
Article 701 Legally Required Standby Systems
Part I. General
Part II. Circuit Wiring
Part III. Sources of Power
Part IV. Overcurrent Protection
Article 702 Optional Standby Systems
Part I. General
Part II. Wiring
Article 705 Interconnected Electric Power Production Sources
Part I. General
Part II. Microgrid Systems
Part III. Interconnected Systems Operating in Island Mode
Article 706 Energy Storage Systems
Part I. General
Part II. Disconnecting Means
Part III. Installation Requirements
Part IV. Circuit Requirements
Part V. Flow Battery ESSs
Part VI. Other Energy Storage Technologies
708 Critical Operations Power Systems (COPS)
Part I. General
Part II. Circuit Wiring and Equipment
Part III. Power Sources and Connection
Part IV. Overcurrent Protection
Part V. System Performance and Analysis
Article 710 Stand-Alone Systems
Article 720 General Requirements for Limited-Energy System Wiring Methods and Materials
Part I. General
Part II. Installation
Article 721 Power Sources for Limited-Energy Systems
Article 722 Limited-Energy Cables for Power-Limited Circuits, Fault-Managed-Power Circuits, Optical Fiber Circuits, and Communications Circuits
Part I. General
Part II. Marking Requirements
Part III. Limited-Energy Cables and Wiring Methods
Part IV. Communication Cables and Wiring Methods
Part V. Class 2 or Class 3 Cables and Wiring Methods
Part VI. Class 4 Cables and Wiring Methods
Part VII. Optical Fiber Cables and Wiring Methods
Part VIII. Power-Limited Fire Alarm (PLFA) Cables and Wiring Methods
Part IX. Circuit Integrity Cables (Type CI), Fire-Resistive Cable Systems, and Electrical Circuit Protective Systems
Article 723 Raceways, Cable Routing Assemblies, and Cable Trays for Limited-Energy Systems
Part I. General
Part II. Application and Installation of Raceways for Limited-Energy Systems
Part III. Application and Installation of Cable Routing Assemblies for Limited-Energy Systems
Part IV. Cable Trays for Limited-Energy Systems
Article 724 Class 1 Power-Limited Circuits and Class 1 Power-Limited Remote-Control and Signaling Circuits
Article 725 Class 2 and Class 3 Power-Limited Circuits
Part I. General
Part II. Installation Requirements
Article 726 Class 4 Fault-Managed Power Systems
Part I. General
Part II. Class 4 Circuits
Article 742 Overvoltage Protection of Limited-Energy Systems
Part I. General
Part II. Primary and Secondary Protection
Article 750 Grounding and Bonding of Limited-Energy Systems
Part I. General
Part II. Conductors and Equipment Outside and Entering Buildings
Part III. Grounding and Bonding Methods
Part IV. Primary and Secondary Protection
Article 760 Fire Alarm Systems
Part I. General
Part II. NPLFA Circuits
Part III. Power-Limited Fire Alarm (PLFA) Circuits
Article 772 Fire-Resistive Cable Systems
Chapter 8 Communications Systems – Outside and
Part I. General
Part II. Wires and Cables Outside and Entering Buildings
Article 810 Antenna Systems.
Part I. General
Part II. Receiving Equipment – Antenna Systems
Part III. Amateur and Citizen Band Transmitting and Receiving Stations – Antenna Systems
Part IV. Interior Installation – Transmitting Stations
Article 820 Community Antenna Television and Radio Distribution Systems
Part I. General
Part II. Protection
Part III. Grounding Methods
Article 830 Network-Powered Broadband Communications Systems
Part I. General
Part II. Cables Outside and Entering Buildings
Part III. Installation Methods Within Buildings
Chapter 9 Tables
Informative Annex A: Informational References
Informative Annex B: Application Information for Ampacity Calculation
Informative Annex C: Conduit, Tubing, and Cable Tray Fill Tables for Conductors and Fixture Wires of the Same Size
Informative Annex D: Examples
Informative Annex E: Reserved
Informative Annex F: Availability and Reliability for Critical Operations Power Systems; and Development and Implementation of Functional Performance Tests (FPTs) for Critical Operations Power Systems
Informative Annex G: Supervisory Control and Data Acquisition (SCADA)
Informative Annex H: Administration and Enforcement
Informative Annex I: Recommended Tightening Torque Tables from UL Standard 486A-486B
Informative Annex J: Reserved
Informative Annex K: Use of Medical Electrical Equipment in Dwellings and Residential Board-and-Care Occupancies
Informative Annex L: Proposed Organization of the 2029 National Electrical Code
Index
Show more

Chapter 1 General

Article 100 Definitions
Article 110 General Requirements for Electrical Installations

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