NFPA 70, National Electrical Code

Cover
Contents
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
	230 - Services
	240 - Overcurrent Protection
	242 - Overvoltage Protection
	250 - Grounding and Bonding
Chapter 3 - Wiring Methods and Materials
	300 - General Requirements for Wiring Methods and Materials
	310 - Conductors for General Wiring
	311 - Medium Voltage Conductors and Cable
	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
	330 - Metal-Clad Cable: Type MC
	332 - Mineral-Insulated, Metal-Sheathed Cable: Type MI
	334 - Nonmetallic-Sheathed Cable: Types NM and NMC
	336 - Power and Control Tray Cable: Type TC
	337 - Type P Cable
	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: TypeI 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-MeltingEquipment
	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 lgnitible 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 and Relocatable Structures
	547 - Agricultural Buildings
	550 - Mobile Homes, Manufactured Homes, and Mobile Home Parks
	551 - Recreational Vehicles and Recreational Vehicle Parks
	552 - Park Trailers
	555 - Marinas, Boatyards, Floating Buildings, 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 Power Transfer 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 - futegrated Electrical Systems
	690 - Solar Photovoltaic (PV) Systems
	691 - Large-Scale Photovoltaic (PV) Electric Supply Stations
	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 Microgricls
	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 - General Requirements for Communications Systems
	805 - Communications Circuits
	810 - Radio and Television Equipment
	820 - Radio and Television Equipment
	830 - Network-Powered Broadband Communications Systems
	840 - Premises-Powered Broadband Communications Systems
Chapter 9 - Tables
	Percent of Cross Section of Conduit and Tubing for Conductors and Cables
	Radius of Conduit and Tubing Bends
	Dimensions and Percent Area of Conduit and Tubing
	Dimensions of Insulated Conductors and Fixture Wires
	Compact Copper and Aluminum Building Wire Nominal Dimensions and Areas
	Conductor Properties
	Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) - Three Single Conductors in Conduit
	Conductor Stranding
Appendix
	Informative Annex
		Product Standards
		Ampacities
		Tables
		Examples
		Construction Types
		Critical Operations Power Systems
		SCADA - Supervisory Control and Data Acquisition
		Administration
		Tightening Torque Tables
		ADA Standards for Accessible Design
	Index
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	Sequence of Events for the StandardsDevelopment Process
	Committee Membership Classifications
	Submitting Public Input
	Information on the NFPA Standards Development Process