NFPA 70: National Electrical Code 2017

Important Notices and Disclaimers
Additional Notices and Disclaimers
90 Introduction
Chapter 1 General
	100 Definitions
	110 Requirements for Electrical Installations
Chapter 2 Wiring and Protection
	200 Use and Identification of Grounded Conductors
	210 Branch Circuits
	215 Feeders
	220 Branch-Circuit, Feeder, and Service Load Calculations
	225 Outside Branch Circuits and Feeders
	230 Services
	240 Overcurrent Protection
	250 Grounding and Bonding
	280 Surge Arresters, Over 1000 Volts
	285 Surge-Protective Devices (SPDs), 1000 Volts or Less
Chapter 3 Wiring Methods and Materials
	300 General Requirements for Wiring Methods and Materials
	310 Conductors for General Wiring
	312 Cabinets, Cutout Boxes, and Meter Socket Enclosures
	314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures
	320 Armored Cable: Type AC
	322 Flat Cable Assemblies: Type FC
	324 Flat Conductor Cable: Type FCC
	326 Integrated Gas Spacer Cable: Type IGS
	328 Medium Voltage Cable: Type MV
	330 Metal-Clad Cable: Type MC
	332 Mineral-Insulated, Metal-Sheathed Cable: Type MI
	334 Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS
	336 Power and Control Tray Cable: Type TC
	338 Service-Entrance Cable: Types SE and USE
	340 Underground Feeder and Branch-Circuit Cable: Type UF
	342 Intermediate Metal Conduit: Type IMC
	344 Rigid Metal Conduit: Type RMC
	348 Flexible Metal Conduit: Type FMC
	350 Liquidtight Flexible Metal Conduit: Type LFMC
	352 Rigid Polyvinyl Chloride Conduit: Type PVC
	353 High Density Polyethylene Conduit: Type HDPE Conduit
	354 Nonmetallic Underground Conduit with Conductors: Type NUCC
	355 Reinforced Thermosetting Resin Conduit: Type RTRC
	356 Liquidtight Flexible Nonmetallic Conduit: Type LFNC
	358 Electrical Metallic Tubing: Type EMT
	360 Flexible Metallic Tubing: Type FMT
	362 Electrical Nonmetallic Tubing: Type ENT
	366 Auxiliary Gutters
	368 Busways
	370 Cablebus
	372 Cellular Concrete Floor Raceways
	374 Cellular Metal Floor Raceways
	376 Metal Wireways
	378 Nonmetallic Wireways
	380 Multioutlet Assembly
	382 Nonmetallic Extensions
	384 Strut-Type Channel Raceway
	386 Surface Metal Raceways
	388 Surface Nonmetallic Raceways
	390 Underfloor Raceways
	392 Cable Trays
	393 Low-Voltage Suspended Ceiling Power Distribution Systems
	394 Concealed Knob-and-Tube Wiring
	396 Messenger-Supported Wiring
	398 Open Wiring on Insulators
	399 Outdoor Overhead Conductors over 1000 Volts
Chapter 4 Equipment for General Use
	400 Flexible Cords and Flexible Cables
	402 Fixture Wires
	404 Switches
	406 Receptacles, Cord Connectors, and Attachment Plugs (Caps)
	408 Switchboards, Switchgear, and Panelboards
	409 Industrial Control Panels
	410 Luminaires, Lampholders, and Lamps
	411 Low-Voltage Lighting
	422 Appliances
	424 Fixed Electric Space-Heating Equipment
	425 Fixed Resistance and Electrode Industrial Process Heating Equipment
	426 Fixed Outdoor Electric Deicing and Snow-Melting Equipment
	427 Fixed Electric Heating Equipment for Pipelines and Vessels
	430 Motors, Motor Circuits, and Controllers
	440 Air-Conditioning and Refrigerating Equipment
	445 Generators
	450 Transformers and Transformer Vaults (Including Secondary Ties)
	455 Phase Converters
	460 Capacitors
	470 Resistors and Reactors
	480 Storage Batteries
	490 Equipment Over 1000 Volts, Nominal
Chapter 5 Special Occupancies
	500 Hazardous (Classified) Locations, Classes I, II, and III, Divisions 1 and 2
	501 Class I Locations
	502 Class II Locations
	503 Class III Locations
	504 Intrinsically Safe Systems
	505 Zone 0, 1, and 2 Locations
	506 Zone 20, 21, and 22 Locations for Combustible Dusts or Ignitible Fibers/Flyings
	510 Hazardous (Classified) Locations — Specific
	511 Commercial Garages, Repair and Storage
	513 Aircraft Hangars
	514 Motor Fuel Dispensing Facilities
	515 Bulk Storage Plants
	516 Spray Application, Dipping, Coating, and Printing Processes Using Flammable or Combustible Materials
	517 Health Care Facilities
	518 Assembly Occupancies
	520 Theaters, Audience Areas of Motion Picture and Television Studios, Performance Areas, and Similar Locations
	522 Control Systems for Permanent Amusement Attractions
	525 Carnivals, Circuses, Fairs, and Similar Events
	530 Motion Picture and Television Studios and Similar Locations
	540 Motion Picture Projection Rooms
	545 Manufactured Buildings
	547 Agricultural Buildings
	550 Mobile Homes, Manufactured Homes, and Mobile Home Parks
	551 Recreational Vehicles and Recreational Vehicle Parks
	552 Park Trailers
	553 Floating Buildings
	555 Marinas, Boatyards, and Commercial and Noncommercial Docking Facilities
	590 Temporary Installations
Chapter 6 Special Equipment
	600 Electric Signs and Outline Lighting
	604 Manufactured Wiring Systems
	605 Office Furnishings
	610 Cranes and Hoists
	620 Elevators, Dumbwaiters, Escalators, Moving Walks, Platform Lifts, and Stairway Chairlifts
	625 Electric Vehicle Charging System
	626 Electrified Truck Parking Spaces
	630 Electric Welders
	640 Audio Signal Processing, Amplification, and Reproduction Equipment
	645 Information Technology Equipment
	646 Modular Data Centers
	647 Sensitive Electronic Equipment
	650 Pipe Organs
	660 X-Ray Equipment
	665 Induction and Dielectric Heating Equipment
	668 Electrolytic Cells
	669 Electroplating
	670 Industrial Machinery
	675 Electrically Driven or Controlled Irrigation Machines
	680 Swimming Pools, Fountains, and Similar Installations
	682 Natural and Artificially Made Bodies of Water
	685 Integrated Electrical Systems
	690 Solar Photovoltaic (PV) Systems
	691 Large-Scale Photovoltaic (PV) Electric Power Production Facility
	692 Fuel Cell Systems
	694 Wind Electric Systems
	695 Fire Pumps
Chapter 7 Special Conditions
	700 Emergency Systems
	701 Legally Required Standby Systems
	702 Optional Standby Systems
	705 Interconnected Electric Power Production Sources
	706 Energy Storage Systems
	708 Critical Operations Power Systems (COPS)
	710 Stand-Alone Systems
	712 Direct Current Microgrids
	720 Circuits and Equipment Operating at Less Than 50 Volts
	725 Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits
	727 Instrumentation Tray Cable: Type ITC
	728 Fire-Resistive Cable Systems
	750 Energy Management Systems
	760 Fire Alarm Systems
	770 Optical Fiber Cables
Chapter 8 Communications Systems
	800 Communications Circuits
	810 Radio and Television Equipment
	820 Community Antenna Television and Radio Distribution Systems
	830 Network-Powered Broadband Communications Systems
	840 Premises-Powered Broadband Communications Systems
Chapter 9 Tables
Informative Annex A Product Safety Standards
Informative Annex B Application Information for Ampacity Calculation
Informative Annex C Conduit and Tubing Fill Tables for Conductors and Fixture Wires of the Same Size
Informative Annex D Examples
Informative Annex E Types of Construction
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-B
Informative Annex J ADA Standards for Accessible Design
Index