Preface IX
Article
90 Introduction 1
Chapter 1
General 11
Article 100
Definitions 12
Article 110
Requirements for Electrical Installations 33
Chapter 2
Wiring and Protection 59
Article 200 Use
and Identification of Grounded Conductors 60
Article 210
Branch Circuits 65
Article 215
Feeders 96
Article 220
Branch-Circuit, Feeder, and Service Calculations 101
Article 225
Outside Branch Circuits and Feeders
120
Article 230
Services 130
Article 240
Overcurrent Protection 157
Article 250
Grounding and Bonding 180
Article 280 Surge
Arresters 244
Article 285
Transient Voltage Surge Suppressors: TVSSs
246
Chapter 3
Wiring Methods and Materials 251
Article 300
Wiring Methods 252
Article 310
Conductors for General Wiring 277
Article 312
Cabinets, Cutout Boxes, and Meter Socket Enclosures 314
Article 314
Outlet, Device, Pull, and Junction Boxes; Conduit Bodies;
Fittings; and Handhole Enclosures
320
Article 320
Armored Cable: Type AC 336
Article 322 Flat
Cable Assemblies: Type FC 339
Article 324 Flat
Conductor Cable: Type FCC 341
Article 326
Integrated Gas Spacer Cable: Type IGS 344
Article 328
Medium Voltage Cable: Type MV 345
Article 330
Metal-Clad Cable: Type MC 346
Article 332
Mineral-Insulated, Metal-Sheathed Cable: Type MI 351
Article 334
Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS 355
Article 336 Power
and Control Tray Cable: Type TC 360
Article 338
Service-Entrance Cable: Types SE and USE 362
Article 340
Underground Feeder and Branch-Circuit Cable: Type UF 364
Article 342
Intermediate Metal Conduit: Type IMC 365
Article 344 Rigid
Metal Conduit: Type RMC 368
Article 348
Flexible Metal Conduit: Type FMC 373
Article 350
Liquidtight Flexible Metal Conduit:
Type LFMC 376
Article 352 Rigid
Nonmetallic Conduit: Type RNC 378
Article 353 High
Density Polyethylene Conduit: Type HDPE Conduit 384
Article 354
Nonmetallic Underground Conduit with Calculations 101
Conductors: Type NUCC 386
Article 356
Liquidtight Flexible Nonmetallic
Conduit: Type LFNC 387
Article 358
Electrical Metallic Tubing: Type EMT 390
Article 360
Flexible Metallic Tubing: Type FMT 393
Article 362
Electrical Nonmetallic Tubing: Type ENT 395
Article 366
Auxiliary Gutters 401
Article 368
Busways 404
Article 370
Cablebus 409
Article 372
Cellular Concrete Floor Raceways 411
Article 374
Cellular Metal Floor Raceways 412
Article 376 Metal
Wireways 414
Article 378
Nonmetallic Wireways 416
Article 380
Multioutlet Assembly 418
Article 382
Nonmetallic Extensions 419
Article 384
Strut-Type Channel Raceway 420
Article 386
Surface Metal Raceways 422
Article 388
Surface Nonmetallic Raceways 424
Article 390
Underfloor Raceways 426
Article 392 Cable
Trays 428
Article 394
Concealed Knob-and-Tube Wiring 439
Article 396
Messenger Supported Wiring 441
Article 398 Open
Wiring on Insulators 442
Chapter 4
Equipment for General Use 445
Article 400
Flexible Cords and Cables 446
Article 402
Fixture Wires 459
Article 404
Switches 463
Article 406
Receptacles, Cord Connectors, and Attachment and Plugs (Caps)
469
Article 408
Switchboards and Panelboards 478
Article 409
Industrial Control Panels 488
Article 410
Luminaires (Lighting Fixtures),
Lampholders, and Lamps 491
Article 411
Lighting Systems Operating at 30 Volts or Less 512
Article 422
Appliances 513
Article 424 Fixed
Electric Space-Heating Equipment 522
Article 426 Fixed
Outdoor Electric Deicing and Snow-Melting Equipment 534
Article
427 Fixed Electric Heating Equipment
for Pipelines and Vessels 538
Article 430
Motors, Motor Circuits, and Controllers 543
Article 440
Air-Conditioning and Refrigerating Equipment 595
Article 445
Generators 605
Article 450
Transformers and Transformer Vaults (Including Secondary Ties)
608
Article 455 Phase
Converters 626
Article 460
Capacitors 628
Article 470
Resistors and Reactors 631
Article 480
Storage Batteries 632
Article 490
Equipment, Over 600 Volts, Nominal 635
Chapter 5
Special Occupancies 645
Article 500
Hazardous (Classified) Locations, Classes I, II, and III,
Divisions 1 and 2 646
Article 501
Class I Locations 671
Article 502 Class
II Locations 698
Article 503 Class
III Locations 708
Article 504
Intrinsically Safe Systems 713
Article 505 Class
I, Zone 0, 1, and 2 Locations 718
Article 506 Zone
20, 21, and 22 Locations for Combustible Dust, Fibers and
Flyings 735
Article 510
Hazardous (Classified) Locations — Specific 741
Article 511
Commercial Garages, Repair and Storage 741
Article 513
Aircraft Hangars 748
Article 514 Motor
Fuel Dispensing Facilities 752
Article 515 Bulk
Storage Plants 759
Article 516 Spray
Application, Dipping, and Coating
Processes 766
Article 517
Health Care Facilities 774
Article 518
Assembly Occupancies 800
Article 520
Theaters, Audience Areas of Motion Picture and Television
Studios, Performance Areas, and Similar Locations 805
Article 525
Carnivals, Circuses, Fairs, and Similar Events 823
Article 530
Motion Picture and Television Studios and Similar Locations 826
Article 540
Motion Picture Projection Rooms 831
Article 545
Manufactured Buildings 834
Article 547
Agricultural Buildings 835
Article 550
Mobile Homes, Manufactured Homes, and Mobile Home Parks 841
Article 551
Recreational Vehicles and Recreational Vehicle Parks 853
Article 552 Park
Trailers 869
Article 553
Floating Buildings 880
Article 555
Marinas and Boatyards 882
Article 590
Temporary Installations 888
Chapter 6
Special Equipment 895
Article 600
Electric Signs and Outline Lighting 896
Article 604
Manufactured Wiring Systems 905
Article 605
Office Furnishings (Consisting of Lighting Accessories and Wired
Partitions) 908
Article 610
Cranes and Hoists 909
Article 620
Elevators, Dumbwaiters, Escalators, Moving Walks, Wheelchair
Lifts, and Stairway Chair Lifts 916
Article 625
Electric Vehicle Charging System 933
Article 630
Electric Welders 942
Article 640 Audio
Signal Processing, Amplification, and Reproduction Equipment 946
Article 645
Information Technology Equipment 955
Article 647
Sensitive Electronic Equipment 959
Article 650 Pipe
Organs 961
Article 660 X-Ray
Equipment 961
Article 665
Induction and Dielectric Heating Equipment 964
Article 668
Electrolytic Cells 970
Article 669
Electroplating 974
Article 670
Industrial Machinery 974
Article 675
Electrically Driven or Controlled Irrigation Machines 977
Article 680
Swimming Pools, Fountains, and Similar Installations 981
Article 682
Natural and Artificially Made Bodies of Water 1011
Article 685
Integrated Electrical Systems 1013
Article 690 Solar
Photovoltaic Systems 1014
Article 692 Fuel
Cell Systems 1036
Article 695 Fire
Pumps 1040
Chapter 7
Special Conditions 1053
Article 700
Emergency Systems 1054
Article 701
Legally Required Standby Systems 1068
Article 702
Optional Standby Systems 1072
Article 705
Interconnected Electric Power Production Sources 1074
Article 720
Circuits and Equipment Operating at Less Than 50 Volts 1078
Article 725 Class
1, Class 2, and Class 3 Remote-Control, Signaling, and
Power-Limited Circuits 1079
Article 727
Instrumentation Tray Cable: Type ITC 1097
Article 760 Fire
Alarm Systems 1098
Article 770
Optical Fiber Cables and Raceways 1112
Article 780
Closed-Loop and Programmed Power Distribution 1119
Chapter 8
Communications Systems 1123
Article 800
Communications Circuits 1124
Article 810 Radio
and Television Equipment 1139
Article 820
Community Antenna Television and Radio Distribution Systems 1144
Article 830
Network-Powered Broadband Communications Systems 1153
Chapter 9
Tables 1167
Table 1 Percent
of Cross Section of Conduit and Tubing for Conductors 1168
Table 2 Radius of
Conduit and Tubing Bends 1171
Table 4
Dimensions and Percent Area of Conduit and Tubing (Areas of
Conduit or Tubing for the Combinations of Wires Permitted in
Table 1, Chapter 9) 1172
Table 5
Dimensions of Insulated Conductors and Fixture Wires 1176
Table 5A Compact
Aluminum Building Wire Nominal Dimensions and Areas 1180
Table 8 Conductor
Properties 1181
Table 9
Alternating-Current Resistance and Reactance for 600-Volt
Cables, 3-Phase, 60 Hz, 75_C (167_F) –Three Single Conductors
in Conduit 1183
Table 11(A) Class
2 and Class 3 Alternating-Current Power Source Limitations 1185
Table 11(B) Class
2 and Class 3 Direct-Current Power Source Limitations 1186
Table 12(A) PLFA
Alternating-Current Power Source Limitations 1187
Table 12(B) PLFA
Direct-Current Power Source Limitations 1187
Annexes
Annex A Product
Safety Standards 1189
Annex B
Application Information for Ampacity
Article Calculation 1193
Annex C Conduit
and Tubing Fill Tables for Conductors and Fixture Wires of the
Same Size 1209
Annex D Examples
1273
Annex E Types of
Construction 1283
Annex F
Cross-Reference Tables 1285
Annex G
Administration and Enforcement 1293
Index
1301
TIA
1332
About the
Editors 1333