national electrical code 2008

NFPA 70

National Electrical Code

2008 Edition

NFPA 70


2008 Edition

NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization

Copyright National Fire Protection Association Provided by IHS under license with NFPA Licensee=Aramco HQ/9980755100

Not for Resale, 09/23/2007 23:20:41 MDTNo reproduction or networking permitted without license from IHS

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2008 EditioCopyright National Fire Protection AssociaProvided by IHS under license with NFPANo reproduction or networking permitted wCopyright 2007, National Fire Protection Association. All Rights Reserved

NFPA 70


2008 Edition

his edition of NFPA 70, National Electrical Code, was prepared by the National Electrical Codeommittee and acted on by NFPA at its June Association Technical Meeting held June 37, 2007, inoston, MA. It was issued by the Standards Council on July 26, 2007, with an effective date of August5, 2007, and supersedes all previous editions.

This edition of NFPA 70 was approved as an American National Standard on August 15, 2007.

History and Development of the National Electrical Code

The National Fire Protection Association has acted as sponsor of the National Electrical Code since911. The original Code document was developed in 1897 as a result of the united efforts of variousnsurance, electrical, architectural, and allied interests.

In accordance with the provisions of the NFPA Regulations Governing Committee Projects, aational Electrical Code Committee Report on Proposals containing proposed amendments to the 2005ational Electrical Code was published by NFPA in July 2006. This report recorded the actions of thearious Code-Making Panels and the Correlating Committee of the National Electrical Code Committeen each proposal that had been made to revise the 2005 Code. The report was circulated to all membersf the National Electrical Code Committee and was made available to other interested NFPA membersnd to the public for review and comment. Following the close of the public comment period, theode-Making Panels met, acted on each comment, and reported their action to the Correlating Com-ittee. NFPA published the National Electrical Code Committee Report on Comments in March 2007,hich recorded the actions of the Code-Making Panels and the Correlating Committee on each public

omment to the National Electrical Code Committee Report on Proposals. The National Electrical Codeommittee Report on Proposals and the National Electrical Code Committee Report on Comments wereresented to the 2007 June Association Technical Meeting for adoption.

NFPA has an Electrical Section that provides particular opportunity for NFPA members interested inlectrical safety to become better informed and to contribute to the development of the Nationallectrical Code and other NFPA electrical standards. At the Electrical Section Codes and Standardseview Session held at the 2007 NFPA World Safety Conference and Exposition, Section members hadpportunity to discuss and review the report of the National Electrical Code Committee prior to thedoption of this edition of the Code by the Association at its 2007 June Technical Session.

This 51st edition supersedes all other previous editions, supplements, and printings dated 1897,899, 1901, 1903, 1904, 1905, 1907, 1909, 1911, 1913, 1915, 1918, 1920, 1923, 1925, 1926, 1928,930, 1931, 1933, 1935, 1937, 1940, 1942, 1943, 1947, 1949, 1951, 1953, 1954, 1955, 1956, 1957,958, 1959, 1962, 1965, 1968, 1971, 1975, 1978, 1981, 1984, 1987, 1990, 1993, 1996, 1999, 2002, and005.

This Code is purely advisory as far as NFPA is concerned. It is made available for a wide variety ofoth public and private uses in the interest of life and property protection. These include both use in lawnd for regulatory purposes, and use in private self-regulation and standardization activities such asnsurance underwriting, building and facilities construction and management, and product testing andertification.

This 2008 edition includes the following usability features as aids to the user. Changes other thanditorial are highlighted with gray shading within sections and with vertical ruling for large blocks ofhanged or new text and for new tables and changed or new figures. Where one or more completearagraphs have been deleted, the deletion is indicated by a bullet () between the paragraphs thatemain. The index now has dictionary-style headers with helpful identifiers at the top of every indexage.n NATIONAL ELECTRICAL CODE 701tion

Licensee=Aramco HQ/9980755100 Not for Resale, 09/23/2007 23:20:41 MDTithout license from IHS

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240 Overcurrent Protection ........................... 70 83I. General ......................................... 70 83

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320 Armored Cable: Type AC ....................... 70175I. General ......................................... 70175

CONTENTS

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RTICLE90 Introduction ........................................ 70 21

Chapter 1 General100 Definitions ......................................... 70 24

I. General ......................................... 70 24II. Over 600 Volts, Nominal .................... 70 31

110 Requirements for Electrical Installations ..... 70 32I. General ......................................... 70 32

II. 600 Volts, Nominal, or Less ................ 70 36III. Over 600 Volts, Nominal .................... 70 38IV. Tunnel Installations over 600 Volts,

Nominal ......................................... 70 40V. Manholes and Other Electrical

Enclosures Intended for PersonnelEntry, All Voltages ............................ 70 41

Chapter 2 Wiring and Protection200 Use and Identification of Grounded

Conductors .......................................... 70 43210 Branch Circuits ................................... 70 45

I. General Provisions ............................ 70 45II. Branch-Circuit Ratings ....................... 70 49

III. Required Outlets .............................. 70 52215 Feeders ............................................. 70 55220 Branch-Circuit, Feeder, and Service

Calculations ........................................ 70 57I. General ......................................... 70 57

II. Branch-Circuit Load Calculations .......... 70 58III. Feeder and Service Load Calculations .... 70 60IV. Optional Feeder and Service Load

Calculations ..................................... 70 62V. Farm Load Calculations .................... 70 66

225 Outside Branch Circuits and Feeders ......... 70 67I. General ......................................... 70 67

II. More Than One Building or OtherStructure ......................................... 70 70

III. Over 600 Volts ................................ 70 72230 Services ............................................ 70 73

I. General ......................................... 70 73II. Overhead Service-Drop Conductors ....... 70 74

III. Underground Service-LateralConductors ...................................... 70 75

IV. Service-Entrance Conductors ............... 70 76V. Service Equipment General ............. 70 78

VI. Service Equipment DisconnectingMeans ............................................ 70 78

VII. Service Equipment OvercurrentProtection ....................................... 70 80

VIII. Services Exceeding 600 Volts,Nominal ......................................... 70 81

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---II. Location ........................................ 70 86

02ional Fire Protection Association HS under license with NFPAon or networking permitted without license from IHSs

RTICLEIII. Enclosures ...................................... 70 90IV. Disconnecting and Guarding ................ 70 90V. Plug Fuses, Fuseholders, and Adapters ... 70 90

VI. Cartridge Fuses and Fuseholders ........... 70 91VII. Circuit Breakers ............................... 70 91

VIII. Supervised Industrial Installations ......... 70 92IX. Overcurrent Protection over 600 Volts,

Nominal ......................................... 70 93250 Grounding and Bonding ......................... 70 94

I. General ......................................... 70 94II. System Grounding ............................ 70 97

III. Grounding Electrode System andGrounding Electrode Conductor ............ 70104

IV. Enclosure, Raceway, and ServiceCable Connections ............................. 70109

V. Bonding ........................................ 70109VI. Equipment Grounding and Equipment

Grounding Conductors ........................ 70113VII. Methods of Equipment Grounding ......... 70117

VIII. Direct-Current Systems ...................... 70120IX. Instruments, Meters, and Relays ........... 70121X. Grounding of Systems and Circuits of

1 kV and Over (High Voltage) .............. 70121280 Surge Arresters, Over 1 kV ..................... 70123

I. General ......................................... 70123II. Installation ..................................... 70124

III. Connecting Surge Arresters ................. 70124285 Surge-Protective Devices (SPDs), 1 kV or

Less .................................................. 70124I. General ......................................... 70124

II. Installation ..................................... 70125III. Connecting SPDs. ............................. 70125

Chapter 3 Wiring Methods and Materials300 Wiring Methods ................................... 70126

I. General Requirements ........................ 70126II. Requirements for over 600 Volts,

Nominal ......................................... 70136310 Conductors for General Wiring ................ 70138312 Cabinets, Cutout Boxes, and Meter Socket

Enclosures .......................................... 70164I. Installation ..................................... 70164

II. Construction Specifications ................. 70165314 Outlet, Device, Pull, and Junction Boxes;

Conduit Bodies; Fittings; and HandholeEnclosures .......................................... 70167I. Scope and General ............................ 70167

II. Installation ..................................... 70168III. Construction Specifications ................. 70174IV. Pull and Junction Boxes for Use on

Systems over 600 Volts, Nominal .......... 70175II. Installation ..................................... 70175

NATIONAL ELECTRICAL CODE 2008 Edition

Licensee=Aramco HQ/9980755100 Not for Resale, 09/23/2007 23:20:41 MDT

ACONTENTS

2Copyright National Fire PrProvided by IHS under licNo reproduction or networ

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---RTICLEIII. Construction Specifications ................. 70177

322 Flat Cable Assemblies: Type FC ............... 70177I. General ......................................... 70177

II. Installation ..................................... 70177III. Construction ................................... 70178

324 Flat Conductor Cable: Type FCC .............. 70178I. General ......................................... 70178


326 Integrated Gas Spacer Cable: Type IGS ...... 70180I. General ......................................... 70180

II. Installation ..................................... 70180III. Construction Specifications ................. 70181

328 Medium Voltage Cable: Type MV ............. 70181I. General ......................................... 70181


330 Metal-Clad Cable: Type MC .................... 70182I. General ......................................... 70182


332 Mineral-Insulated, Metal-Sheathed Cable:Type MI ............................................. 70184I. General ......................................... 70184


334 Nonmetallic-Sheathed Cable: Types NM,NMC, and NMS ................................... 70185I. General ......................................... 70185


336 Power and Control Tray Cable: Type TC .... 70188I. General ......................................... 70188


338 Service-Entrance Cable: Types SE andUSE .................................................. 70189I. General ......................................... 70189


340 Underground Feeder and Branch-CircuitCable: Type UF .................................... 70190I. General ......................................... 70190


342 Intermediate Metal Conduit: Type IMC ...... 70191I. General ......................................... 70191


344 Rigid Metal Conduit: Type RMC .............. 70192I. General ......................................... 70192

II. Installation ..................................... 70193

III. Construction Specifications ................. 70194

008 Edition NATIONAL ELECTRICAL CODEotection Association ense with NFPA Licensee=A

Not for Resking permitted without license from IHSARTICLE348 Flexible Metal Conduit: Type FMC ........... 70194


350 Liquidtight Flexible Metal Conduit: TypeLFMC ............................................... 70196I. General ......................................... 70196


352 Rigid Polyvinyl Chloride Conduit: TypePVC ................................................. 70197I. General ......................................... 70197


353 High Density Polyethylene Conduit: TypeHDPE Conduit ..................................... 70200I. General ......................................... 70200


354 Nonmetallic Underground Conduit withConductors: Type NUCC ........................ 70201I. General ......................................... 70201


355 Reinforced Thermosetting Resin Conduit:Type RTRC ......................................... 70203I. General ......................................... 70203


356 Liquidtight Flexible Nonmetallic Conduit:Type LFNC ......................................... 70205I. General ......................................... 70205


358 Electrical Metallic Tubing: Type EMT ........ 70207I. General ......................................... 70207


360 Flexible Metallic Tubing: Type FMT ......... 70208I. General ......................................... 70208


362 Electrical Nonmetallic Tubing: Type ENT ... 70210I. General ......................................... 70210

II. Installation ..................................... 70210III. Construction Specifications .................. 70211

366 Auxiliary Gutters ................................. 70212I. General ......................................... 70212


368 Busways ............................................ 70214I. General Requirements ........................ 70214

II. Installation ..................................... 70214

III. Construction ................................... 70215

703

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7Copyright NatProvided by INo reproductiRTICLEIV. Requirements for Over 600 Volts,

Nominal ......................................... 70216370 Cablebus ........................................... 70216372 Cellular Concrete Floor Raceways ............ 70217374 Cellular Metal Floor Raceways ................ 70218

I. Installation ..................................... 70219II. Construction Specifications ................. 70219

376 Metal Wireways ................................... 70219I. General ......................................... 70219


378 Nonmetallic Wireways ........................... 70221I. General ......................................... 70221


380 Multioutlet Assembly ............................ 70222382 Nonmetallic Extensions .......................... 70222


III. Construction Specifications(Concealable Nonmetallic Extensionsonly) ............................................. 70224

384 Strut-Type Channel Raceway ................... 70224I. General ......................................... 70224


386 Surface Metal Raceways ........................ 70226I. General ......................................... 70226


388 Surface Nonmetallic Raceways ................ 70227I. General ......................................... 70227


390 Underfloor Raceways ............................ 70228392 Cable Trays ........................................ 70229394 Concealed Knob-and-Tube Wiring ............. 70235


III. Construction Specifications ................. 70236396 Messenger-Supported Wiring ................... 70237


398 Open Wiring on Insulators ...................... 70237I. General ......................................... 70237


Chapter 4 Equipment for General Use400 Flexible Cords and Cables ...................... 70240

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---I. General ......................................... 70240

04ional Fire Protection Association HS under license with NFPAon or networking permitted without license from IHSRTICLEII. Construction Specifications ................. 70249

III. Portable Cables Over 600 Volts,Nominal ......................................... 70250

402 Fixture Wires ...................................... 70251404 Switches ............................................ 70255

I. Installation ..................................... 70255II. Construction Specifications ................. 70258

406 Receptacles, Cord Connectors, andAttachment Plugs (Caps) ......................... 70258

408 Switchboards and Panelboards ................. 70262I. General ......................................... 70262

II. Switchboards .................................. 70263III. Panelboards .................................... 70263IV. Construction Specifications ................. 70264

409 Industrial Control Panels ........................ 70265I. General ......................................... 70265


410 Luminaires, Lampholders, and Lamps ........ 70267I. General ......................................... 70267

II. Luminaire Locations ......................... 70268III. Provisions at Luminaire Outlet Boxes,

Canopies, and Pans ............................ 70269IV. Luminaire Supports ........................... 70269V. Grounding ...................................... 70270

VI. Wiring of Luminaires ........................ 70271VII. Construction of Luminaires ................. 70272

VIII. Installation of Lampholders ................. 70273IX. Construction of Lampholders ............... 70273X. Lamps and Auxiliary Equipment ........... 70274

XI. Special Provisions for Flush andRecessed Luminaires .......................... 70274

XII. Construction of Flush and RecessedLuminaires ...................................... 70274

XIII. Special Provisions forElectric-Discharge Lighting Systems of1000 Volts or Less ............................ 70274

XIV. Special Provisions forElectric-Discharge Lighting Systems ofMore Than 1000 Volts ........................ 70276

XV. Lighting Track ................................. 70277XVI. Decorative Lighting and Similar

Accessories ..................................... 70277411 Lighting Systems Operating at 30 Volts or

Less .................................................. 70278422 Appliances ......................................... 70278


III. Disconnecting Means ........................ 70281IV. Construction ................................... 70282V. Marking ........................................ 70283

424 Fixed Electric Space-Heating Equipment ..... 70284I. General ......................................... 70284

II. Installation ..................................... 70284III. Control and Protection of Fixed

Electric Space-Heating Equipment ......... 70284

IV. Marking of Heating Equipment ............ 70286



ACONTENTS

2Copyright National Fire PrProvided by IHS under licNo reproduction or networRTICLEV. Electric Space-Heating Cables .............. 70286

VI. Duct Heaters ................................... 70288VII. Resistance-Type Boilers ..................... 70289

VIII. Electrode-Type Boilers ....................... 70290IX. Electric Radiant Heating Panels and

Heating Panel Sets ............................ 70290426 Fixed Outdoor Electric Deicing and

Snow-Melting Equipment ........................ 70292I. General ......................................... 70292

II. Installation ..................................... 70293III. Resistance Heating Elements ............... 70293IV. Impedance Heating ........................... 70294V. Skin-Effect Heating ........................... 70294

VI. Control and Protection ....................... 70295427 Fixed Electric Heating Equipment for

Pipelines and Vessels ............................. 70295I. General ......................................... 70295

II. Installation ..................................... 70296III. Resistance Heating Elements ............... 70296IV. Impedance Heating ........................... 70297V. Induction Heating ............................. 70297

VI. Skin-Effect Heating ........................... 70298VII. Control and Protection ....................... 70298

430 Motors, Motor Circuits, and Controllers ...... 70298I. General ......................................... 70298

II. Motor Circuit Conductors ................... 70304III. Motor and Branch-Circuit Overload

Protection ....................................... 70306IV. Motor Branch-Circuit Short-Circuit

and Ground-Fault Protection ................. 70310V. Motor Feeder Short-Circuit and

Ground-Fault Protection ...................... 70313VI. Motor Control Circuits ....................... 70313

VII. Motor Controllers ............................. 70315VIII. Motor Control Centers ....................... 70316

IX. Disconnecting Means ........................ 70317X. Adjustable-Speed Drive Systems ........... 70320

XI. Over 600 Volts, Nominal .................... 70321XII. Protection of Live Parts All

Voltages ......................................... 70322XIII. Grounding All Voltages .................. 70323XIV. Tables ........................................... 70324

440 Air-Conditioning and RefrigeratingEquipment .......................................... 70327I. General ......................................... 70327

II. Disconnecting Means ........................ 70329III. Branch-Circuit Short-Circuit and

Ground-Fault Protection ...................... 70330IV. Branch-Circuit Conductors .................. 70331V. Controllers for Motor-Compressors ........ 70331

VI. Motor-Compressor and Branch-CircuitOverload Protection ........................... 70332

VII. Provisions for Room Air Conditioners .... 70333445 Generators ......................................... 70334450 Transformers and Transformer Vaults

(Including Secondary Ties) ...................... 70335I. General Provisions ............................ 70335

II. Specific Provisions Applicable to

Different Types of Transformers ............ 70339


Not for Resking permitted without license from IHS

--`,,,,,``,`,````ARTICLEIII. Transformer Vaults ........................... 70341

455 Phase Converters ................................. 70342I. General ......................................... 70342

II. Specific Provisions Applicable toDifferent Types of Phase Converters ....... 70343

460 Capacitors .......................................... 70344I. 600 Volts, Nominal, and Under ............ 70344

II. Over 600 Volts, Nominal .................... 70344470 Resistors and Reactors ........................... 70345

I. 600 Volts, Nominal, and Under ............ 70345II. Over 600 Volts, Nominal .................... 70346

480 Storage Batteries .................................. 70346490 Equipment, Over 600 Volts, Nominal ......... 70347

I. General ......................................... 70347II. Equipment Specific Provisions ......... 70347

III. Equipment Metal-Enclosed PowerSwitchgear and Industrial ControlAssemblies ...................................... 70350

IV. Mobile and Portable Equipment ............ 70352V. Electrode-Type Boilers ....................... 70352

Chapter 5 Special Occupancies500 Hazardous (Classified) Locations, Classes

I, II, and III, Divisions 1 and 2 ................. 70354501 Class I Locations ................................. 70362

I. General ......................................... 70362II. Wiring .......................................... 70363

III. Equipment ...................................... 70368502 Class II Locations ................................ 70372


III. Equipment ...................................... 70374503 Class III Locations ............................... 70378


III. Equipment ...................................... 70379504 Intrinsically Safe Systems ....................... 70380505 Class I, Zone 0, 1, and 2 Locations ........... 70384506 Zone 20, 21, and 22 Locations for

Combustible Dusts or IgnitibleFibers/Flyings ...................................... 70398

510 Hazardous (Classified) Locations Specific .............................................. 70404

511 Commercial Garages, Repair and Storage .... 70404513 Aircraft Hangars .................................. 70407514 Motor Fuel Dispensing Facilities .............. 70410515 Bulk Storage Plants .............................. 70414516 Spray Application, Dipping, and Coating

Processes ............................................ 70419517 Health Care Facilities ............................ 70425I. General ......................................... 70425

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--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---RTICLEII. Wiring and Protection ........................ 70427

III. Essential Electrical System .................. 70430IV. Inhalation Anesthetizing Locations ........ 70437V. X-Ray Installations ........................... 70440

VI. Communications, Signaling Systems,Data Systems, Fire Alarm Systems,and Systems Less Than 120 Volts,Nominal ......................................... 70441

VII. Isolated Power Systems ...................... 70442518 Assembly Occupancies .......................... 70443520 Theaters, Audience Areas of Motion

Picture and Television Studios,Performance Areas, and Similar Locations ... 70444I. General ......................................... 70444

II. Fixed Stage Switchboards ................... 70446III. Fixed Stage Equipment Other Than

Switchboards ................................... 70447IV. Portable Switchboards on Stage ............ 70448V. Portable Stage Equipment Other Than

Switchboards ................................... 70451VI. Dressing Rooms ............................... 70452

VII. Grounding ...................................... 70453522 Control Systems for Permanent

Amusement Attractions ........................... 70453I. General ......................................... 70453

II. Control Circuits ............................... 70453III. Control Circuit Wiring Methods ........... 70454

525 Carnivals, Circuses, Fairs, and SimilarEvents ............................................... 70455I. General Requirements ........................ 70455

II. Power Sources ................................. 70455III. Wiring Methods ............................... 70456IV. Grounding and Bonding ..................... 70457

530 Motion Picture and Television Studiosand Similar Locations ............................ 70457I. General ......................................... 70457

II. Stage or Set .................................... 70458III. Dressing Rooms ............................... 70460IV. Viewing, Cutting, and Patching Tables .... 70460V. Cellulose Nitrate Film Storage Vaults ..... 70460

VI. Substations ..................................... 70460540 Motion Picture Projection Rooms ............. 70461

I. General ......................................... 70461II. Equipment and Projectors of the

Professional Type .............................. 70461III. Nonprofessional Projectors .................. 70462IV. Audio Signal Processing,

Amplification, and ReproductionEquipment ...................................... 70462

545 Manufactured Buildings ......................... 70462547 Agricultural Buildings ........................... 70463550 Mobile Homes, Manufactured Homes, and

Mobile Home Parks ............................... 70466I. General ......................................... 70466

II. Mobile and Manufactured Homes ......... 70467

III. Services and Feeders ......................... 70474

06ional Fire Protection Association HS under license with NFPAon or networking permitted without license from IHSRTICLE551 Recreational Vehicles and Recreational

Vehicle Parks ....................................... 70475I. General ......................................... 70475

II. Combination Electrical Systems ............ 70477III. Other Power Sources ......................... 70477IV. Nominal 120-Volt or 120/240-Volt

Systems .......................................... 70478V. Factory Tests ................................... 70485

VI. Recreational Vehicle Parks .................. 70485552 Park Trailers ....................................... 70488

I. General ......................................... 70488II. Low-Voltage Systems ........................ 70488

III. Combination Electrical Systems ............ 70489IV. Nominal 120-Volt or 120/240-Volt

Systems .......................................... 70490V. Factory Tests ................................... 70496

553 Floating Buildings ................................ 70497I. General ......................................... 70497

II. Services and Feeders ......................... 70497III. Grounding ...................................... 70497

555 Marinas and Boatyards .......................... 70498590 Temporary Installations .......................... 70501

Chapter 6 Special Equipment600 Electric Signs and Outline Lighting ........... 70504

I. General ......................................... 70504II. Field-Installed Skeleton Tubing and

Wiring ........................................... 70508604 Manufactured Wiring Systems ................. 70509605 Office Furnishings (Consisting of Lighting

Accessories and Wired Partitions) .............. 70510610 Cranes and Hoists ................................ 70511


III. Contact Conductors ........................... 70514IV. Disconnecting Means ........................ 70515V. Overcurrent Protection ....................... 70515

VI. Control .......................................... 70516VII. Grounding ...................................... 70516

620 Elevators, Dumbwaiters, Escalators,Moving Walks, Platform Lifts, andStairway Chairlifts ................................ 70517I. General ......................................... 70517

II. Conductors ..................................... 70519III. Wiring .......................................... 70520IV. Installation of Conductors ................... 70523V. Traveling Cables .............................. 70523

VI. Disconnecting Means and Control ......... 70524VII. Overcurrent Protection ....................... 70526

VIII. Machine Rooms, Control Rooms,Machinery Spaces, and Control Spaces .... 70526

IX. Grounding ...................................... 70527X. Emergency and Standby Power

Systems .......................................... 70527625 Electric Vehicle Charging System ............. 70527I. General ......................................... 70527



ACONTENTS

2Copyright National Fire PrProvided by IHS under licNo reproduction or networRTICLEII. Wiring Methods ............................... 70528

III. Equipment Construction ..................... 70528IV. Control and Protection ....................... 70529V. Electric Vehicle Supply Equipment

Locations ........................................ 70529626 Electrified Truck Parking Spaces .............. 70531

I. General ......................................... 70531II. Electrified Truck Parking Spaces

Electrical Wiring Systems .................... 70532III. Electrified Truck Parking Space Supply

Equipment ...................................... 70533IV. Transport Refrigerated Units (TRUs) ...... 70535

630 Electric Welders ................................... 70536I. General ......................................... 70536

II. Arc Welders .................................... 70536III. Resistance Welders ........................... 70537IV. Welding Cable ................................. 70538

640 Audio Signal Processing, Amplification,and Reproduction Equipment .................... 70538I. General ......................................... 70538

II. Permanent Audio System Installations .... 70542III. Portable and Temporary Audio System

Installations ..................................... 70542645 Information Technology Equipment ........... 70544647 Sensitive Electronic Equipment ................ 70546650 Pipe Organs ........................................ 70547660 X-Ray Equipment ................................ 70548

I. General ......................................... 70548II. Control .......................................... 70549

III. Transformers and Capacitors ................ 70549IV. Guarding and Grounding .................... 70549

665 Induction and Dielectric HeatingEquipment .......................................... 70550I. General ......................................... 70550

II. Guarding, Grounding, and Labeling ....... 70551668 Electrolytic Cells ................................. 70551669 Electroplating ...................................... 70554670 Industrial Machinery ............................. 70555675 Electrically Driven or Controlled

Irrigation Machines ............................... 70556I. General ......................................... 70556

II. Center Pivot Irrigation Machines .......... 70558680 Swimming Pools, Fountains, and Similar

Installations ......................................... 70558I. General ......................................... 70558

II. Permanently Installed Pools ................. 70561III. Storable Pools ................................. 70568IV. Spas and Hot Tubs ........................... 70568V. Fountains ....................................... 70570

VI. Pools and Tubs for Therapeutic Use ...... 70572VII. Hydromassage Bathtubs ..................... 70572

682 Natural and Artificially Made Bodies ofWater ................................................ 70573

I. General ......................................... 70573


Not for Resking permitted without license from IHS

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---ARTICLEII. Installation ..................................... 70573

III. Grounding and Bonding ..................... 70574685 Integrated Electrical Systems ................... 70575

I. General ......................................... 70575II. Orderly Shutdown ............................ 70575

690 Solar Photovoltaic Systems ..................... 70575I. General ......................................... 70575

II. Circuit Requirements ......................... 70578III. Disconnecting Means ........................ 70580IV. Wiring Methods ............................... 70581V. Grounding ...................................... 70583

VI. Marking ........................................ 70585VII. Connection to Other Sources ............... 70585

VIII. Storage Batteries .............................. 70587IX. Systems over 600 Volts ...................... 70588

692 Fuel Cell Systems ................................ 70588I. General ......................................... 70588

II. Circuit Requirements ......................... 70589III. Disconnecting Means ........................ 70589IV. Wiring Methods ............................... 70590V. Grounding ...................................... 70590

VI. Marking ........................................ 70590VII. Connection to Other Circuits ............... 70590

VIII. Outputs Over 600 Volts ...................... 70591695 Fire Pumps ......................................... 70591

Chapter 7 Special Conditions700 Emergency Systems .............................. 70596

I. General ......................................... 70596II. Circuit Wiring ................................. 70597

III. Sources of Power ............................. 70598IV. Emergency System Circuits for

Lighting and Power ........................... 70600V. Control Emergency Lighting

Circuits .......................................... 70600VI. Overcurrent Protection ....................... 70600

701 Legally Required Standby Systems ............ 70601I. General ......................................... 70601

II. Circuit Wiring ................................. 70602III. Sources of Power ............................. 70602IV. Overcurrent Protection ....................... 70603

702 Optional Standby Systems ...................... 70604I. General ......................................... 70604

II. Circuit Wiring ................................. 70605III. Grounding ...................................... 70605IV. Sources of Power ............................. 70605

705 Interconnected Electric Power ProductionSources .............................................. 70605I. General ......................................... 70605

II. Utility-Interactive Inverters ................. 70608III. Generators ...................................... 70609

708 Critical Operations Power Systems(COPS) .............................................. 70609I. General ......................................... 70609II. Circuit Wiring and Equipment .............. 70610

707

ramco HQ/9980755100 ale, 09/23/2007 23:20:41 MDT

ARTICLEIII. Power Sources and Connection ............ 70612IV. Overcurrent Protection ....................... 70613V. System Performance and Analysis ......... 70614

720 Circuits and Equipment Operating at Less

ARTICLEIII. Protection ...................................... 70655IV. Grounding Methods .......................... 70656V. Installation Methods Within Buildings .... 70657

VI. Listing Requirements ......................... 70659

T

CONTENTS

7Copyright NatProvided by INo reproductiThan 50 Volts ...................................... 70614725 Class 1, Class 2, and Class 3

Remote-Control, Signaling, andPower-Limited Circuits ........................... 70614I. General ......................................... 70614

II. Class 1 Circuits ............................... 70615III. Class 2 and Class 3 Circuits ................ 70617IV. Listing Requirements ......................... 70622

727 Instrumentation Tray Cable: Type ITC ........ 70624760 Fire Alarm Systems .............................. 70625

I. General ......................................... 70625II. NonPower-Limited Fire Alarm

(NPLFA) Circuits .............................. 70626III. Power-Limited Fire Alarm (PLFA)

Circuits .......................................... 70628IV. Listing Requirements ......................... 70631

770 Optical Fiber Cables and Raceways ........... 70633I. General ......................................... 70633

II. Cables Outside and EnteringBuildings. ....................................... 70634

III. Protection ...................................... 70635IV. Grounding Methods .......................... 70635V. Installation Methods Within Buildings .... 70636

VI. Listing Requirements ......................... 70638

Chapter 8 Communications Systems800 Communications Circuits ........................ 70640

I. General ......................................... 70640II. Wires and Cables Outside and

Entering Buildings ............................. 70641III. Protection ...................................... 70642IV. Grounding Methods .......................... 70644V. Installation Methods Within Buildings ... 70645

VI. Listing Requirements ......................... 70647810 Radio and Television Equipment ............... 70649

I. General ......................................... 70649II. Receiving Equipment Antenna

Systems .......................................... 70650III. Amateur Transmitting and Receiving

Stations Antenna Systems ................ 70652IV. Interior Installation Transmitting

Stations .......................................... 70653820 Community Antenna Television and Radio

Distribution Systems .............................. 70653I. General ......................................... 70653

II. Coaxial Cables Outside and EnteringBuildings ........................................ 7065408ional Fire Protection Association HS under license with NFPAon or networking permitted without license from IHS

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---830 Network-Powered BroadbandCommunications Systems ........................ 70660I. General ......................................... 70660

II. Cables Outside and Entering Buildings ... 70662III. Protection ...................................... 70664IV. Grounding Methods .......................... 70666V. Installation Methods Within Buildings .... 70667

VI. Listing Requirements ......................... 70669ABLES

Chapter 9 Tables1 Percent of Cross Section of Conduit and

Tubing for Conductors ........................... 706712 Radius of Conduit and Tubing Bends ......... 706714 Dimensions and Percent Area of Conduit

and Tubing(Areas of Conduit or Tubing for theCombinations of Wires Permitted in Table1, Chapter 9) ....................................... 70672

5 Dimensions of Insulated Conductors andFixture Wires ....................................... 70676

5A Compact Copper and Aluminum BuildingWire Nominal Dimensions and Areas ......... 70680

8 Conductor Properties ............................. 706819 Alternating-Current Resistance and

Reactance for 600-Volt Cables, 3-Phase,60 Hz, 75C (167F) Three SingleConductors in Conduit ............................ 70682

11(A) Class 2 and Class 3 Alternating-CurrentPower Source Limitations ........................ 70684

11(B) Class 2 and Class 3 Direct-Current PowerSource Limitations ................................ 70684

12(A) PLFA Alternating-Current Power SourceLimitations .......................................... 70685

12(B) PLFA Direct-Current Power SourceLimitations .......................................... 70685Annex A ............................................ 70686Annex B ............................................ 70689Annex C ............................................ 70703Annex D ............................................ 70763Annex E ............................................ 70773Annex F ............................................ 70774Annex G ............................................ 70776Annex H ............................................ 70778Index ................................................ 70785NATIONAL ELECTRICAL CODE 2008 Edition


NATIONAL ELECTRICAL CODE COMMITTEE

e Committeeccurred. A k

orrelating

. Carpenter,ion of Electric

Mark W. Earley, Secretary

James E. Brunssen, Telcordia Technologies, Inc., NJ [UT]Re

Merto(VDocument: 70B, Document: 70E, Document: 79)

William R. Drake, Marinco, CA [M]PC

JW

J

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James M. Daly, General Cable, NJ [M]

David L. Hittinger, IEC of Greater Cincinnati, OH [IM](Alt. to R. G. Wilkinson)

imary responotential ignitfire and exp

M

L

KWH

Rep. Institute of Electrical & Electronics Engineers, Inc.PalmeComm

Re

Lanny G. McMahill, City of Phoenix, AZ [E]


2008Copyright National Fire ProtectioProvided by IHS under license wNo reproduction or networking pe

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---Edition Associith NFPArmitted r L. Hickman, National Joint Apprentice & Trainingittee, MD [L]p. International Brotherhood of Electrical Workers

Rep. International Association of Electrical InspectorsH. Brooke Stauffer, National Electrical ContractorsAssociation, MD [IM]CODEMAKING PANEL NO. 1Articles 90, 100, 110, Annex A, Annex G

John D. Minick, ChairNational Electrical Manufacturers Association, TX [M]

ichael A. Anthony, University of Michigan, MI [U]Rep. Association of Higher Education Facilities Officers

ouis A. Barrios, Shell Global Solutions, TX [U]Rep. American Chemistry Council

enneth P. Boyce, Underwriters Laboratories Inc., IL [RT]illiam T. Fiske, Intertek Testing Services NA, Inc., NY [RT]. Landis Floyd, The DuPont Company, DE [U]

David L. Hittinger, IEC of Greater Cincinnati, OH [IM]Rep. Independent Electrical Contractors, Inc.

Neil F. LaBrake, Jr., National Grid, NY [UT]Rep. Electric Light & Power Group/EEI

Randall R. McCarver, Telcordia Technologies, Inc., NJ [U]Rep. Alliance for Telecommunications Industry Solutionsalmer L. Hickman, National Joint Apprentice & Trainingommittee, MD [L]

Rep. International Brotherhood of Electrical Workersohn R. Kovacik, Underwriters Laboratories Inc., IL [RT]illiam M. Lewis, Martinsville, IN [U]

Rep. American Chemistry Councilim Pauley, Square D Company/Schneider Electric, KY [M]

Rep. National Electrical Manufacturers Associationichael D. Toman, MEGA Power Electrical Services, Inc.,D [IM]

Rep. National Electrical Contractors Associationohn W. Troglia, Edison Electric Institute, WI [UT]

Rep. Electric Light & Power Group/EEIobert G. Wilkinson, IEC Texas Gulf Coast, TX [IM]

Rep. Independent Electrical Contractors, Inc.

Alternateseffrey Boksiner, Telcordia Technologies, Inc., NJ [UT]

(Alt. to J. E. Brunssen)

Committee Scope: This Committee shall have prelectricity as a source of electric shock and as a presponsible for text to minimize the propagation ofn NATIONAL ELECTRICAL CODEation

Licensee=AraNot for Resalewithout license from IHSNeil F. LaBrake, Jr., National Grid, NY [UT](Alt. to J. W. Troglia)

Danny Liggett, Dupont Company, TX [U](Alt. to W. M. Lewis)

Mark C. Ode, Underwriters Laboratories Inc., NC [RT](Alt. to J. R. Kovacik)

Richard P. Owen, City of St. Paul, MN [E](Alt. to J. W. Carpenter)

NonvotingDavid Mascarenhas, Canadian Standards Association,Canada [RT]Richard G. Biermann, Biermann Electric Company, Inc.,IA [IM]

(Member Emeritus)D. Harold Ware, Libra Electric Company, OK [IM]

(Member Emeritus)

sibility for documents on minimizing the risk ofion source of fires and explosions. It shall also belosions due to electrical installations.p. Alliance for Telecommunications Industry Solutionsn W. Bunker, Jr., U.S. Department of State, VA [U]L to Document: 110, Document: 111, Document: 70,

(Alt. to J. Pauley)Stanley J. Folz, Morse Electric Company, NV [IM]

(Alt. to M. D. Toman)National Fire Protection Association, MA(nonvoting)

Jean A. OConnor, Recording SecretaryNational Fire Protection Association, MA

(nonvoting)These lists represent the membership at the time ththat time, changes in the membership may have odocument.

Technical C

James WInternational Associatwas balloted on the final text of this edition. Sinceey to classifications is found at the back of this

Committee

Chairal Inspectors, TX [E]709

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AlternatesM

BT

E

R

DCompany, SC [U]

Gil Moniz, National Electrical Manufacturers Association,

State of Wisconsin, WI [E]Association of

RW

LDFNT[D

RB

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Andrew M. Trotta, U.S. Consumer Product SafetyCommission, MD [C]

City of St. Paul, MN [E]Rep. International Association of Electrical Inspectors

L

P

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7010Copyright National Fire ProtProvided by IHS under licenNo reproduction or networkiawrence S. Ayer, Biz Com Electric, Inc., OH [IM]Rep. Independent Electrical Contractors, Inc.

aul J. Casparro, Scranton Electricians JATC, PA [L]Rep. International Brotherhood of Electrical Workers

es Easter, Allied Tube and Conduit, IL [M]Rep. National Electrical Manufacturers Association

anford E. Egesdal, Egesdal Associates PLC, MN [M]Rep. Automatic Fire Alarm Association, Inc.

homas J. Guida, Underwriters Laboratories Inc., NY [RT]ay R. R. Keden, ERICO, Inc., CA [M]

Rep. Building Industry Consulting Services Internationalection Association se with NFPA Licensee

Not for Rng permitted without license from IHSRonald E. Maassen, Lemberg Electric Company, Inc.,WI [IM]

Rep. National Electrical Contractors AssociationJuan C. Menendez, Southern California Edison Company,CA [UT]

Rep. Electric Light & Power Group/EEISteven J. Owen, Steven J. Owen, Inc., AL [IM]

Rep. Associated Builders & Contractors, Inc.David A. Pace, Olin Corporation, AL [U]

Rep. American Chemistry CouncilCODEMAKING PANEL NO. 3Articles 300, 590, 720, 725, 727, 760, Chapter 9, Tables 11(A) and (B), and Tables 12(A) and (B)

Richard P. Owen, ChairRep. International

ichard W. Becker, Engineered Electrical Systems, Inc.,A [U]

Rep. Institute of Electrical & Electronics Engineers, Inc.awrence Brown, National Association of Home Builders,C [U]rank Coluccio, New York City Department of Buildings,Y [E]homas L. Harman, University of Houston-Clear Lake, TX

SE]onald M. King, IBEW Local Union 313, DE [L]

Rep. International Brotherhood of Electrical Workersobert L. LaRocca, Underwriters Laboratories Inc., NY [RT]rian J. Nenninger, The Dow Chemical Company, TX [U]

Rep. American Chemistry Councilim Pauley, Square D Company/Schneider Electric, KY [M]

Rep. National Electrical Manufacturers Associationonald L. Purvis, Sharpsburg, GA [UT]

Rep. Electric Light & Power Group/EEIichael D. Toman, MEGA Power Electrical Services, Inc.,D [IM]

Rep. National Electrical Contractors Associationobert G. Wilkinson, IEC Texas Gulf Coast, TX [IM]

Rep. Independent Electrical Contractors, Inc.Electrical Inspectors

AlternatesJames E. Degnan, Sparling, WA [U]

(Alt. to R. W. Becker)David A. Dini, Underwriters Laboratories Inc., IL [RT]

(Alt. to R. L. LaRocca)Daniel J. Kissane, Pass & Seymour/Legrand, NY [M]

(Alt. to J. Pauley)William Ross McCorcle, American Electric Power, OK [UT]

(Alt. to R. L. Purvis)William J. McGovern, City of Plano, TX [E]

(Alt. to R. W. Weber)Clifford L Rediger, Independent Electrical ContractorsTraining Fund, CO [IM]

(Alt. to R. G. Wilkinson)Janet D. Skipper, IBEW Local Union 606, FL [L]

(Alt. to D. M. King)Joseph E. Wiehagen, National Association of HomeBuilders, MD [U]

(Alt. to L. Brown)Nonvoting

William Burr, Canadian Standards Association, Canada [RT]Douglas A. Lee, U.S. Consumer Product SafetyCommission, MD [C](Alt. to H. L. Floyd)

CODEMAKING PANEL NO. 2Articles 210, 215, 220, Annex D, Chapter 9 Examples 1 through 6

Raymond W. Weber, Chairark Christian, IBEW Local Union 175, TN [L](Alt. to P. L. Hickman)

enjamin F. Dunford, Ben Dunford Electric Company Inc.,N [IM]

(Alt. to D. L. Hittinger)rnest J. Gallo, Telcordia Technologies, Inc., NJ [U]

(Alt. to R. R. McCarver)ussell J. Helmick, Jr., Orange, CA [E]

(Alt. to L. G. McMahill)onald H. McCullough, II, Washington Savannah RiverMA [M](Alt. to J. D. Minick)

Alfredo M Ramirez, Underwriters Laboratories Inc., IL [RT](Alt. to K. P. Boyce)

John W. Troglia, Edison Electric Institute, WI [UT](Alt. to N. F. LaBrake, Jr.)

NonvotingArk Tsisserev, City of Vancouver, Canada

Rep. CSA/Canadian Electrical Code CommitteeNATIONAL ELECTRICAL CODE 2008 Edition

=Aramco HQ/9980755100 esale, 09/23/2007 23:20:41 MDT

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---

Melvin K. Sanders, Things Electrical Co., Inc.(TECo., Inc.), IA [U]

J

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Roger S. Passmore, Davis Electrical Constructors, Inc., SC[IM]

TRep. Electric Light & Power Group/EEI

Malcolm Allison, Ferraz Shawmut, MA [M]R

H

MJT

J

J

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Paul D. Barnhart, Underwriters Laboratories Inc., NC [RT]

CODE-MAKING PANEL NO. 5

JRep. Alliance for Telecommunications Industry Solutions

David Brender, Copper Development Association, Inc., NY[

M

P

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WMIC

TX [U]Rep. Institute of Electrical & Electronics Engineers, Inc.



--`,,,,,``,`,````,,`M]Rep. Copper Development Association Inc.

artin J. Brett, Jr., Wheatland Tube Company, NJ [M]Rep. American Iron and Steel Institute

aul Dobrowsky, Innovative Technology Services, NY [U]Rep. American Chemistry Council

an Hammel, IBEW Local Union 704, IA [L]Rep. International Brotherhood of Electrical Workers

. Scott Harding, F. B. Harding, Inc., MD [IM]Rep. Independent Electrical Contractors, Inc.

illiam J. Helfrich, U.S. Department of Labor, PA [E]ichael J. Johnston, International Association of Electrical

nspectors, TX [E]huck Mello, Underwriters Laboratories Inc., WA [RT]Edition NATIONAL ELECTRICAL CODEn Association ith NFPA Licensee=Ara

Not for Resalermitted without license from IHS

`,`,``,`,,`-`-`,,`,,`,`,,`---Gregory J. Steinman, Thomas & Betts Corporation, TN [M]Rep. National Electrical Manufacturers Association

Robert G. Stoll, Thomas Associates, Inc., OH [M]Rep. Power Tool Institute, Inc

Richard Temblador, Southwire Company, GA [M]Rep. The Aluminum Association

C. Douglas White, CenterPoint Energy, Inc., TX [UT]Rep. Electric Light & Power Group/EEI

AlternatesHarold G. Alexander, American Electric Power, OH [UT]

(Alt. to C. D. White)Ron D. Alley, Northern New Mexico IEC, NM [IM]

(Alt. to G. S. Harding)Articles 200, 250, 280, 285

Ronald J. Toomer, ChairToomer Electrical Company Inc., LA [IM]

Rep. National Electrical Contractors Association

effrey Boksiner, Telcordia Technologies, Inc., NJ [UT] Daleep C. Mohla, DCM Electrical Consulting Services, Inc.,obert J. Deaton, The Dow Chemical Company, TX [U]Rep. Institute of Electrical & Electronics Engineers, Inc.

oward D. Hughes, Hughes Electric Company Inc., AR [IM]Rep. National Electrical Contractors Association

ark C. Ode, Underwriters Laboratories Inc., NC [RT]ames J. Rogers, Towns of Oak Bluffs, Tisbury, Westisbury, MA [E]

Rep. International Association of Electrical Inspectorsohn A. Sigmund, PPG Industries, Inc., LA [U]

Rep. American Chemistry Councilohn W. Young, Siemens Energy & Automation, Inc., GA [M]

Rep. National Electrical Manufacturers Associationincent Zinnante, Advantage Electric, Inc., TX [IM]

Rep. Independent Electrical Contractors, Inc.(Alt. to M. C. Ode)Mark D. Gibbs, BWXT Y-12, LLC, TN [U]

(Alt. to R. J. Deaton)Kenneth W. Hengst, EAS Contracting, LP, TX [IM]

(Alt. to V. Zinnante)Mark R. Hilbert, State of New Hampshire, NH [E]

(Alt. to J. J. Rogers)Philip M. Piqueira, General Electric Company, CT [M]

(Alt. to J. W. Young)Mark H. Sumrall, IBEW Local Union 527, TX [L]

(Alt. to J. M. Naughton)Peter R. Walsh, Ferraz Shawmut, MA [M]

(Alt. to M. Allison)CODEMAKING PANEL NO. 4Articles 225, 230

James M. Naughton, ChairIBEW Local Union 103, MA [L]

Rep. International Brotherhood of Electrical Workers

homas L. Adams, Exelon Corporation, IL [UT] AlternatesRep. Institute of Electrical & Electronics Engineers, Inc.ohn E. Sleights, St. Paul Travelers, CT [I]

Alternateshane M. Clary, Bay Alarm Company, CA [M]

(Alt. to S. E. Egesdal)dam D. Corbin, Corbin Electrical Services, Inc., NJ [IM]

(Alt. to L. S. Ayer)anny Liggett, Dupont Company, TX [U]

(Alt. to D. A. Pace). David Mills, Bechtel Savannah River, Inc., SC [U]

(Alt. to M. K. Sanders)ark C. Ode, Underwriters Laboratories Inc., NC [RT]

(Alt. to T. J. Guida)(Alt. to S. J. Owen)Marty L. Riesberg, IBEW Local Union 22, MD [L]

(Alt. to P. J. Casparro)George A. Straniero, Tyco/AFC Cable Systems, Inc., NJ[M]

(Alt. to L. Easter)Robert J. Walsh, City of Hayward, CA [E]

(Alt. to R. P. Owen)Nonvoting

Edward C. Lawry, Oregon, WI [E](Member Emeritus)7011

mco HQ/9980755100 , 09/23/2007 23:20:41 MDT

Joseph P. DeGregoria, Underwriters Laboratories Inc., NY[RT]

R

P

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Paul R. Picard, Tyco/AFC Cable Systems, Inc., MA [M](Alt. to R. Temblador)

SRep. National Electrical Manufacturers Association

RT

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LI

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AlternatesJacob Benninger, IBEW Local Union 241 JATC, NY [L]

MRep. National Electrical Contractors Association

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JJ

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[U]


7012Copyright National Fire ProtProvided by IHS under licenNo reproduction or networki

--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---arry C. Brown, IBEW Local Union 606, FL [L]Rep. International Brotherhood of Electrical Workers

ohn J. Cangemi, Underwriters Laboratories Inc., NY [RT]ames M. Daly, General Cable, NJ [M]

Rep. National Electrical Manufacturers Associationimothy Edwards, Alcan Cable Company, GA [M]

Rep. The Aluminum Associationhris J. Fahrenthold, Design Electric, TX [IM]

Rep. Independent Electrical Contractors, Inc.erman J. Hall, Austin, TX [M]

Rep. Society of the Plastics Industry, Inc.ection Association se with NFPA Licensee

Not for Rng permitted without license from IHSJohn W. Wes Ray, Duke Energy Corporation, NC [UT]Rep. Electric Light & Power Group/EEI

Gregory L. Runyon, Eli Lilly and Company, IN [U]Rep. American Chemistry Council

David E. Schumacher, Associated Builders & Contractors,Inc., IA [IM]H. R. Stewart, HRS Consulting, TX [U]

Rep. Institute of Electrical & Electronics Engineers, Inc.George A. Straniero, Tyco/AFC Cable Systems, Inc., NJ[M]

Rep. Copper Development Association Inc.CODE-MAKING PANEL NO. 7Articles 320, 322, 324, 326, 328, 330, 332, 334, 336, 338, 340, 382, 394, 396, 398

Gaylen D. Rogers, ChairHighland, UT [E]

Rep. International Association of Electrical Inspectors

artin D. Adams, Adams Electric, Inc., CO [IM] Ronald G. Nickson, National Multi Housing Council, DCobert L. Huddleston, Jr., Eastman Chemical Company,N [U]

Rep. American Chemistry Council. W. Jerry Kent, Kent Electric & Plumbing Systems,X [IM]

Rep. Independent Electrical Contractors, Inc.illiam F. Laidler, South Shore VoTech/IBEW 223, MA [L]

Rep. International Brotherhood of Electrical Workers. Bruce McClung, Electrical Safety Consulting Services,

nc., WV [U]Rep. Institute of Electrical & Electronics Engineers, Inc.

aul R. Picard, Tyco/AFC Cable Systems, Inc., MA [M]Rep. The Aluminum Association

ran P. Post, Akron, OH [E]Rep. International Association of Electrical Inspectors

arl Timothy Wall, Alabama Power Company, AL [UT]Rep. Electric Light & Power Group/EEI

ustin D. Wetherell, Underwriters Laboratories Inc., NYRT]oseph S. Zimnoch, The Okonite Company, NJ [M]

Rep. Copper Development Association Inc.(Alt. to W. F. Laidler)Peter E. Bowers, Satellite Electric Company, Inc., MD [IM]

(Alt. to G. W. Kent)James M. Daly, General Cable, NJ [M]

(Alt. to J. S. Zimnoch)Timothy Edwards, Alcan Cable Company, GA [M]

(Alt. to P. R. Picard)Richard A. Holub, E. I. DuPont de Nemours & Company,Inc., DE [U]

(Alt. to R. L. Huddleston, Jr.)Lowell Lisker, American Insulated Wire Corporation, MA[M]

(Alt. to S. B. Friedman)Harry J. Sassaman, Forest Electric Corporation, NJ [IM]

(Alt. to S. Cline)Bradley J. Schmidt, Underwriters Laboratories Inc., IL [RT]

(Alt. to A. D. Wetherell)John Stacey, City of St. Louis, MO [E]

(Alt. to O. P. Post)Donald A. Voltz, Mustang Engineering, Inc., TX [U]

(Alt. to L. B. McClung)CODE-MAKING PANEL NO. 6Articles 310, 400, 402, Chapter 9 Tables 5 through 9, Annex B

Scott Cline, ChairMcMurtrey Electric, Inc., CA [IM]

Rep. National Electrical Contractors Association

amuel B. Friedman, General Cable Corporation, RI [M](Alt. to C. Mello)onald Lai, FCI Electrical, NH [M]

(Alt. to G. J. Steinman)aul J. LeVasseur, Bay City JEATC, MI [L]

(Alt. to D. Hammel)ichard E. Loyd, R & N Associates, AZ [M]

(Alt. to M. J. Brett, Jr.)ichael E. McNeil, FMC Corporation/Bio Polymer, ME [U]

(Alt. to P. Dobrowsky)athan Philips, Integrated Electronic Systems, OR [IM]

(Alt. to R. J. Toomer)Elliot Rappaport, Electro Technology Consultants, Inc., FL[U]

(Alt. to D. C. Mohla)Phil Simmons, Simmons Electrical Services, WA [M]

(Alt. to D. Brender)David A. Williams, Delta Charter Township, MI [E]

(Alt. to M. J. Johnston)Nonvoting

Robert A. Nelson, Canadian Standards Association, Canada[RT]NATIONAL ELECTRICAL CODE 2008 Edition


AlternatesWilliam B. Crist, Houston Stafford Electric Company, TX[

J

R

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J

Samuel R. LaDart, City of Memphis, TN [L](Alt. to H. C. Brown)

Joseph Dabe, City of St. Paul, MN [L]Rep. International Brotherhood of Electrical Workers

G

J

J

M

D

D

R

S[

GLS

Alternates

ROR [L]

Rep. International Brotherhood of Electrical WorkersB

RY

F[T

R

Rep. National Electrical Manufacturers AssociationSukanta Sengupta, FMC Corporation, NJ [U]



--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---illy Breitkreutz, Fluor Corporation, TX [U]Rep. Associated Builders & Contractors, Inc.

ichard P. Fogarty, Consolidated Edison Company of Nework, Inc., NY [UT]

Rep. Electric Light & Power Group/EEIrederic P. Hartwell, Hartwell Electrical Services, Inc., MA

SE]homas J. LeMay, LeMay Electric, Inc., GA [IM]

Rep. Independent Electrical Contractors, Inc.obert D. Osborne, Underwriters Laboratories Inc., NC [RT]Edition NATIONAL ELECTRICAL CODEn Association ith NFPA Licensee=Ara

Not for Resalermitted without license from IHSRep. Institute of Electrical & Electronics Engineers, Inc.Monte Szendre, Wilson Construction Company, OR [IM]

Rep. National Electrical Contractors AssociationRalph H. Young, Eastman Chemical Company, TN [U]

Rep. American Chemistry Council

AlternatesCharles L. Boynton, The DuPont Company, TX [U]

(Alt. to R. H. Young)CODE-MAKING PANEL NO. 9Articles 312, 314, 404, 408, 450, 490

Robert A. McCullough, ChairOcean County Construction Inspection Department, NJ [E]


odney D. Belisle, NECA-IBEW Electrical Training Trust, Bradford D. Rupp, Allied Moulded Products, Inc., OH [M]eorge R. Dauberger, Thomas & Betts Corporation, TN [M]Rep. National Electrical Manufacturers Association

ames C. Dollins, Tyco/AFC Cable Systems, MA [M]Rep. The Aluminum Association

ames T. Dwight, Sasol North America, Inc., LA [U]Rep. American Chemistry Council

. Shan Griffith, Kellogg, Brown & Root, Inc., TX [U]Rep. Institute of Electrical & Electronics Engineers, Inc.

avid G. Humphrey, County of Henrico, Virginia, VA [E]Rep. International Association of Electrical Inspectors

avid H. Kendall, Carlon, Lamson & Sessions, OH [M]Rep. Society of the Plastics Industry, Inc.

ichard E. Loyd, R & N Associates, AZ [M]Rep. American Iron and Steel Institute

tephen P. Poholski, Newkirk Electric Associates, Inc., MIIM]

Rep. National Electrical Contractors Associationeorge F. Walbrecht, Underwriters Laboratories Inc., IL [RT]eslie R. Zielke, South Carolina Electric & Gas Company,C [UT]

Rep. Electric Light & Power Group/EEIRichard J. Berman, Underwriters Laboratories Inc., IL [RT](Alt. to G. F. Walbrecht)

Joyce Evans Blom, The Dow Chemical Company, CA [U](Alt. to J. T. Dwight)

Duane A. Carlson, PRS Consulting Engineers, WA [U](Alt. to M. S. Griffith)

Charles W. Forsberg, Shaker Heights, OH [M](Alt. to D. H. Kendall)

James M. Imlah, City of Hillsboro, OR [E](Alt. to D. G. Humphrey)

Kevin J. Lippert, Eaton Corporation, PA [M](Alt. to G. R. Dauberger)

Gregory L. Maurer, Wheatland Tube Company, AR [M](Alt. to R. E. Loyd)

Gary W. Pemble, Montana Electrical JATC, MT [L](Alt. to J. Dabe)

C. Ernest Reynolds, Hatfield-Reynolds Electric Company,AZ [IM]

(Alt. to J. R. Burns)Richard Temblador, Southwire Company, GA [M]

(Alt. to J. C. Dollins)CODE-MAKING PANEL NO. 8Articles 342, 344, 348, 350, 352, 353, 354, 356, 358, 360, 362, 366, 368, 370, 372, 374, 376, 378, 380, 384,

386, 388, 390, 392, Chapter 9, Tables 1 through 4, Annex C

Julian R. Burns, ChairBurns Electrical/Quality Power Solutions, Inc., NC [IM]

Rep. Independent Electrical Contractors, Inc.IM](Alt. to C. J. Fahrenthold)

ames D. Erwin, Celanese, Ltd., TX [U](Alt. to G. L. Runyon)

ogers Hester, Jr., Encore Wire Limited, TX [M](Alt. to G. A. Straniero)

ames K. Hinrichs, State of Washington, WA [E](Alt. to G. D Rogers)

acob Killinger, Underwriters Laboratories Inc., IL [RT](Alt. to J. J. Cangemi)David Mercier, Southwire Company, GA [M](Alt. to J. M. Daly)

Dennis A. Nielsen, Lawrence Berkeley National Laboratory,CA [U]

(Alt. to H. R. Stewart)Peter Pollak, The Aluminum Association, Inc., VA [M]

(Alt. to T. Edwards)Thomas H. Wood, Cecil B. Wood Inc., IL [IM]

(Alt. to M. D. Adams)7013

mco HQ/9980755100 , 09/23/2007 23:20:41 MDT

Kevin J. Breen, Breen Electrical Contractors Inc., NY [IM](Alt. to T. J. LeMay)

James C. Carroll, Square D Company/Schneider Electric,TN [M]

KN

JA

Paul W. Myers, Innovene LLC, OH [U](Alt. to S. Sengupta)

Donald R. Offerdahl, North Dakota State Electrical Board,ND [E]

ING PANicles 240, 7

James T. Dollard, Jr., ChairIBEW Local Union 98, PA [L]

CI

M

DRep. Institute of Electrical & Electronics Engineers, Inc.

Charles Eldridge, Indianapolis Power & Light Company, IN[

C

C

JR

GR

G

Inc., PA [E]

ING PAN460, 470, A

Brinkmeyer,Britain Electric Company, TX [IM]

R

J

T

Robert G. Fahey, City of Janesville, WI [E]Rep. International Association of Electrical Inspectors

W

CP

L

Lawrence E. Todd, Intertek Testing Services NA, Inc., OR[RT]



--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---illiam D. Glover, PPG Industries, Inc., WV [U]Rep. American Chemistry Council

harles A. Goetz, Underwriters Laboratories Inc., IL [RT]aul E. Guidry, Fluor Enterprises, Inc., TX [U]

Rep. Associated Builders & Contractors, Inc.eo H. Haas, Jr., CenterPoint Energy, Inc., TX [UT]

Rep. Electric Light & Power Group/EEIection Association se with NFPA Licensee

Not for Rng permitted without license from IHSRon Widup, Shermco Industries, Inc., TX [IM]Rep. InterNational Electrical Testing Association

James R. Wright, Siemens Energy & Automation, Inc., IL[M]

Rep. National Electrical Manufacturers AssociationRep. National Electrical Contractors Association

ick L. Bunch, Tecumseh Products Company, MI [M]Rep. Air-Conditioning and Refrigeration Institute

. Ron Caccamese, Alterman Electric Co., Ltd., TX [L]Rep. International Brotherhood of Electrical Workers

erry D. Cole, Hamer Electric, Inc., WA [IM]Rep. Independent Electrical Contractors, Inc.

Paul S. Hamer, Chevron Energy Technology Company, CA[U]

Rep. American Petroleum InstituteVincent J. Saporita, Cooper Bussmann, MO [M]Lynn F. Saunders, Brighton, MI [U]

Rep. Institute of Electrical & Electronics Engineers, Inc.UT]Rep. Electric Light & Power Group/EEI

arl Fredericks, The Dow Chemical Company, TX [U]Rep. American Chemistry Council

. W. Kimblin, Eaton Electrical Corporation, PA [M]Rep. National Electrical Manufacturers Association

ohn R. Kovacik, Underwriters Laboratories Inc., IL [RT]obert W. Mount, Jr., Hussmann Corporation, MO [M]

Rep. Air-Conditioning and Refrigeration Instituteeorge J. Ockuly, OFallon, MO [M]ichard Sobel, Quantum Electric Corporation, NY [IM]

Rep. National Electrical Contractors Associationerald W. Williams, County of Ventura, California, CA [E]


CODE-MAKArticles 409, 430, 440,

Wayne(Alt. to G. W. Williams)Frank G. Ladonne, Underwriters Laboratories Inc., IL [RT]

(Alt. to J. R. Kovacik)Richard E. Lofton, II, IBEW Local Union 280, OR [L]

(Alt. to J. T. Dollard, Jr.)Alan Manche, Square D Company/Schneider Electric, KY[M]

(Alt. to C. W. Kimblin)Vincent J. Saporita, Cooper Bussmann, MO [M]

(Alt. to G. J. Ockuly)Steve A. Struble, Freemans Electric Service, Inc., SD [IM]

(Alt. to M. Borthick)Steven E. Townsend, General Motors Corporation, MI [U]

(Alt. to D. M. Darling)

EL NO. 11nnex D, Example D8

ChairRep. International Brotherhood of Electrical Workers

harles K. Blizard, American Electrical Testing Company,nc., MA [IM]

Rep. InterNational Electrical Testing Associationadeline Borthick, IEC of Houston, Inc., TX [IM]

Rep. Independent Electrical Contractors, Inc.ennis M. Darling, Ayres, Lewis, Norris & May, Inc., MI [U]

AlternatesRobert R. Gage, National Grid, NY [UT]

(Alt. to C. Eldridge)Roderic Hageman, PRIT Service, Inc., IL [IM]

(Alt. to C. K Blizard)Robert J. Kauer, Middle Department Inspection Agency,(Alt. to B. D. Rupp)enneth L. McKinney, Jr., Underwriters Laboratories Inc.,C [RT]

(Alt. to R. D. Osborne)ames C. Missildine, Jr., Southern Company Services, Inc.,L [UT]

(Alt. to R. P. Fogarty)

CODE-MAKArt(Alt. to R. A. McCullough)Rhett A. Roe, IBEW Local Union 26 JATC, MD [L]

(Alt. to R. D. Belisle)

EL NO. 1080NATIONAL ELECTRICAL CODE 2008 Edition


AlternatesLarry

(ARalphNew Y

(AJames

(AStanle

(ABarry

(ARobert J. Keough, Emerson Motor Company, MO [M]

(Alt. to J. R. Wright)

Thomas E. Moore, City of North Royalton, OH [E](Alt. to R. G. Fahey)

]

]

(Alt. to R. L. Bunch)

ING PAN645, 647, 6xamples D

. Croushoreeny Power, PAc Light & Pow

K

TC

R

R

RTA

T

SNJohn H. Mortimer, Inductotherm Corporation, NJ [M]

(VL to 610, 630, 665, 668, 669)R

D

CAC

Kenneth White, Olin Corporation, NY [U]Rep. American Chemistry Council

[M](Alt. to T. Lottmann)

Andre R. Cartal, Yardley, PA [E](Member Emeritus)



--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---Edition NATIONAL ELECTRICAL CODEn Association ith NFPA Licensee=Ara

Not for Resalermitted without license from IHSalph C. Prichard, Hercules Incorporated, DE [U]Rep. Institute of Electrical & Electronics Engineers, Inc.

avid R. Quave, IBEW Local Union 903, MS [L]Rep. International Brotherhood of Electrical Workers

raig Sato, Underwriters Laboratories Inc., CA [RT]rthur E. Schlueter, Jr., A. E. Schlueter Pipe Organompany, GA [M]

Rep. American Institute of Organ Builders(VL to 640, 650)

George S. Tidden, Georges Electrical Service Inc., TX [IM](Alt. to R. A. Jones)

Charles M. Trout, Maron Electric Company, FL [IM](Alt. to T. L. Hedges)

Robert C. Turner, Oxford, MD [M](VL to 610, 630, 665, 668, 669)(Alt. to J. H. Mortimer)

NonvotingCODE-MAKArticles 610, 620, 625, 630, 640,

Annex D, E

Timothy MAllegh

Rep. Electri

ent B. Givens, Alcoa, Inc., TX [M]Rep. The Aluminum Association(VL to 610, 625, 630, 645, 660, 665, 668, 669, 685)

homas L. Hedges, Hedges Electric & Construction Inc.,A [IM]

Rep. National Electrical Contractors Associationon L. Janikowski, City of Wausau, Wisconsin, WI [E]

Rep. International Association of Electrical Inspectorsobert E. Johnson, ITE Safety, MA [U]

Rep. Information Technology Industry Council(VL to 640, 645, 647, 685)

obert A. Jones, Independent Electrical Contractors, Inc.,X [IM]ndy Juhasz, Kone, Inc., IL [M]

Rep. National Elevator Industry Inc.(VL to 610, 620, 630)

odd Lottmann, Cooper Bussmann, MO [M]Rep. National Electrical Manufacturers Association

am Marcovici, New York City Department of Buildings,Y [E]EL NO. 1250, 660, 665, 668, 669, 670, 685,9 and D10

, Chair[UT]er Group/EEI

AlternatesWilliam E. Anderson, The Procter & Gamble Company, OH[U]

(Alt. to R. C. Prichard)Jeffrey W. Blain, Schindler Elevator Corporation, NY [M]

(VL to 610, 620, 630)(Alt. to A. Juhasz)

Thomas M. Burke, Underwriters Laboratories Inc., CA [RT](Alt. to C. Sato)

Jeffrey L. Holmes, IBEW Local Union 1 JATC, MO [L](Alt. to D. R. Quave)

Tim McClintock, Wayne County, Ohio, OH [E](Alt. to R. L. Janikowski)

Roger D. McDaniel, Georgia Power Company, GA [UT](Alt. to T. M. Croushore)

Peter Pollak, The Aluminum Association, Inc., VA [M](VL to 610, 625, 630, 645, 660, 665, 668, 669, 685)(Alt. to K. B. Givens)

Lori L. Tennant, Square D Company/Schneider Electric, NCW. Burns, Burns Electric, Inc., TX [IM]lt. to T. D. Cole)M. Esemplare, Consolidated Edison Company ofork, NY [UT]

lt. to L. H. Haas, Jr.)M. Fahey, IBEW Local Union 103, MA [L]

lt. to J. R. Caccamese)y J. Folz, Morse Electric Company, NV [IM]lt. to W. Brinkmeyer)G. Karnes, Underwriters Laboratories Inc., CA [RT]

lt. to C. A. Goetz)

Arthur S. Neubauer, Colonial Pipeline Company, GA [U(Alt. to P. S. Hamer)

George J. Ockuly, OFallon, MO [M](Alt. to V. J. Saporita)

Charles L. Powell, Eastman Chemical Company, TN [U(Alt. to W. D. Glover)

Arthur J. Smith, III, Waldemar S. Nelson & Company,Inc., LA [U]

(Alt. to L. F. Saunders)Russell A. Tiffany, Johnson Controls, Inc., PA [M]7015

mco HQ/9980755100 , 09/23/2007 23:20:41 MDT

CODE-MAKING PANEL NO. 13Articles 445, 455, 480, 690, 692, 695, 700, 701, 702, 705

s H. Wood, C. Wood Inc., Ilectrical Contr

TA

W

D[

G[SE]E

R

B

BRep. Electric Light & Power Group/EEI

K

J

SNE[

D[

TC

(Alt. to B. N. Hornberger)

(VL to 690, 692, 705)(Alt. to K. Krastins)

ING PAN4, 505, 506

ld Cook, Chevelopment S

Association of

T

M

EJL

M

Gregory D. Hall, Better-Way Electric, Inc., CO [IM]

JC

Rep. Grain Elevator and Processing Society



--`,,,,,``,`,````,,``,`,``,`,,`-`-`,,`,,`,`,,`---Rep. Independent Electrical Contractors, Inc.oseph H. Kuczka, Killark Electric Manufacturingompany, MO [M]

Rep. National Electrical Manufacturers Association

AlternatesDonald W. Ankele, Underwriters Laboratories Inc., IL [RT]

(Alt. to E. M. Briesch)enneth Krastins, Plug Power, Inc., NY [M]Rep. U.S. Fuel Cell Council(VL to 690, 692, 705)

ames S. Nasby, Master Control Systems, Inc., IL [M]Rep. National Electrical Manufacturers Association

teven H. Pasternack, Intertek Testing Services NA, Inc.,Y [RT]lliot Rappaport, Electro Technology Consultants, Inc., FL

U]Rep. Institute of Electrical & Electronics Engineers, Inc.

uke W. Schamel, Electrical Service Solutions, Inc., COIM]

Rep. Independent Electrical Contractors, Inc.odd W. Stafford, National Joint Apprentice & Trainingommittee, TN [L]

Rep. International Brotherhood of Electrical Workers

CODE-MAKArticles 500, 501, 502, 503, 50