National Electrical Code 2002

by National Fire Protection Association

• ISBN13: 9780877654605
• ISBN10: 0877654603
• Edition: 1st
• Format: Paperback
• Copyright: 2001-09-19
• Publisher: Del Mar Pub

Summary

The #1 electrical reference, the 2002 National Electrical Code?, is now available through today's #1 electrical publisher, Delmar Publishers! The single most important reference in the electrical industry, the National Electrical Code? (NEC?), is updated every three years and outlines minimum standards for all types of electrical installations. Adopted as law by states, cities, and municipalities, the 2002 edition of the NEC? features newly adopted articles on transient voltage surge suppressors (Article 285), sensitive electronic equipment (Article 647), fuel cells (Article 692), and more! The latest administrative rules (e.g., Article 80) and safety rules (e.g., Article 100 on flash protection and Article 430 on motor disconnect locations) are also included. An excellent resource for anyone involved in electrical design, installation, and inspection, NEC? 2002 provides 100% of the information needed to meet Code and avoid costly errors in electrical installations of all types. Delmar is pleased to make this authoritative reference by the NFPA - containing the most widely accepted and most frequently used criteria for electrical installations in the U.S. - available directly from us for the convenience of our customers who work in and around the electrical trades. It may be used independently or as a companion to any electrical book, including Delmar's best-selling wiring series as well as our guides to understanding and using the NEC?.

Table of Contents

Administration and Enforcement	23	(6)
Introduction	29	(4)
General
Definitions	33	(7)
General	33	(6)
Over 600 Volts, Nominal	39	(1)
Requirements for Electrical Installations	40	(9)
General	40	(3)
600 Volts, Nominal, or Less	43	(2)
Over 600 Volts, Nominal	45	(2)
Tunnel Installations over 600 Volts, Nominal	47	(2)
Wiring and Protection
Use and Identification of Grounded Conductors	49	(2)
Branch Circuits	51	(9)
General Provisions	51	(3)
Branch-Circuit Ratings	54	(3)
Required Outlets	57	(3)
Feeders	60	(1)
Branch-Circuit, Feeder, and Service Calculations	61	(8)
General	61	(2)
Feeders and Services	63	(3)
Optional Calculations for Computing Feeder and Service Loads	66	(3)
Method for Computing Farm Loads	69	(1)
Outside Branch Circuits and Feeders	69	(6)
General	70	(2)
More Than One Building or Other Structure	72	(2)
Over 600 Volts	74	(1)
Services	75	(10)
General	75	(2)
Overhead Service-Drop Conductors	77	(1)
Underground Service-Lateral Conductors	78	(1)
Service-Entrance Conductors	78	(3)
Service Equipment---General	81	(1)
Service Equipment---Disconnecting Means	81	(1)
Service Equipment---Overcurrent Protection	82	(2)
Services Exceeding 600 Volts, Nominal	84	(1)
Overcurrent Protection	85	(10)
General	85	(3)
Location	88	(3)
Enclosures	91	(1)
Disconnecting and Guarding	92	(1)
Plug Fuses, Fuseholders, and Adapters	92	(1)
Cartridge Fuses and Fuseholders	93	(1)
Circuit Breakers	93	(1)
Supervised Industrial Installations	94	(1)
Overcurrent Protection Over 600 Volts, Nominal	95	(1)
Grounding	95	(25)
General	95	(3)
Circuit and System Grounding	98	(6)
Grounding Electrode System and Grounding Electrode Conductor	104	(4)
Enclosure, Raceway, and Service Cable Grounding	108	(1)
Bonding	108	(3)
Equipment Grounding and Equipment Grounding Conductors	111	(4)
Methods of Equipment Grounding	115	(2)
Direct-Current Systems	117	(1)
Instruments, Meters, and Relays	118	(1)
Grounding of Systems and Circuits of 1 kV and Over (High Voltage)	119	(1)
Surge Arresters	120	(2)
General	120	(1)
Installation	121	(1)
Connecting Surge Aresters	121	(1)
Transient Voltage Surge Suppressors: TVSSs	122	(1)
General	122	(1)
Installation	122	(1)
Connecting Transient Voltage Surge Suppressors	122	(1)
Wiring Methods and Materials
Wiring Methods	123	(10)
General Requirements	123	(9)
Requirements for Over 600 Volts, Nominal	132	(1)
Conductors for General Wiring	133	(28)
Cabinets, Cutout Boxes, and Meter Socket Enclosures	161	(3)
Installation	161	(1)
Construction Specifications	162	(2)
Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Manholes	164	(9)
Scope and General	164	(1)
Installation	165	(5)
Construction Specifications	170	(1)
Manholes and Other Electric Enclosures Intended for Personnel Entry	171	(1)
Pull and Junction Boxes for Use on Systems Over 600 Volts, Nominal	172	(1)
Armored Cable: Type AC	173	(1)
General	173	(1)
Installation	173	(1)
Construction Specifications	174	(1)
Flat Cable Assemblies: Type FC	174	(1)
General	174	(1)
Installation	174	(1)
Construction	175	(1)
Flat Conductor Cable: Type FCC	175	(3)
General	175	(1)
Installation	176	(1)
Construction	177	(1)
Integrated Gas Spacer Cable: Type IGS	178	(1)
General	178	(1)
Installation	178	(1)
Construction Specifications	178	(1)
Medium Voltage Cable: Type MV	179	(1)
General	179	(1)
Installation	179	(1)
Construction Specifications	179	(1)
Metal-Clad Cable: Type MC	179	(2)
General	179	(1)
Installation	179	(2)
Construction Specifications	181	(1)
Mineral-Insulated, Metal-Sheathed Cable: Type MI	181	(1)
General	181	(1)
Installation	181	(1)
Construction Specifications	182	(1)
Nonmetallic- Sheathed Cable: Types NM, NMC, and NMS	182	(2)
General	182	(1)
Installation	182	(2)
Construction Specifications	184	(1)
Power and Control Tray Cable: Type TC	184	(2)
General	184	(1)
Installation	185	(1)
Construction Specifications	185	(1)
Service-Entrance Cable: Types SE and USE	186	(1)
General	186	(1)
Installation	186	(1)
Construction	186	(1)
Underground Feeder and Branch-Circuit Cable: Type UF	187	(1)
General	187	(1)
Installation	187	(1)
Construction Specifications	187	(1)
Intermediate Metal Conduit: Type IMC	187	(2)
General	187	(1)
Installation	188	(1)
Construction Specifications	189	(1)
Rigid Metal Conduit: Type RMC	189	(2)
General	189	(1)
Installation	189	(2)
Construction Specifications	191	(1)
Flexible Metal Conduit: Type FMC	191	(1)
General	191	(1)
Installation	191	(1)
Liquidtight Flexible Metal Conduit: Type LFMC	192	(2)
General	192	(1)
Installation	193	(1)
Construction Specifications	193	(1)
Rigid Nonmetallic Conduit: Type RNC	194	(3)
General	194	(1)
Installation	194	(1)
Construction Specifications	195	(2)
Nonmetallic Underground Conduit with Conductors: Type NUCC	197	(1)
General	197	(1)
Installation	197	(1)
Construction Specifications	198	(1)
Liquidtight Flexible Nonmetallic Conduit: Type LFNC	198	(2)
General	198	(1)
Installation	198	(1)
Construction Specifications	199	(1)
Electrical Metallic Tubing: Type EMT	200	(1)
General	200	(1)
Installation	200	(1)
Construction Specifications	201	(1)
Flexible Metallic Tubing: Type FMT	201	(1)
General	201	(1)
Installation	201	(1)
Construction Specifications	202	(1)
Electrical Nonmetallic Tubing: Type ENT	202	(2)
General	202	(1)
Installation	202	(2)
Construction Specifications	204	(1)
Auxiliary Gutters	204	(2)
Busways	206	(2)
General Requirements	206	(1)
Requirements for Over 600 Volts, Nominal	207	(1)
Cablebus	208	(1)
Cellular Concrete Floor Raceways	209	(1)
Cellular Metal Floor Raceways	210	(1)
Installation	210	(1)
Construction Specifications	211	(1)
Metal Wireways	211	(1)
General	211	(1)
Installation	211	(1)
Construction Specifications	212	(1)
Nonmetallic Wireways	212	(1)
General	212	(1)
Installation	212	(1)
Construction Specifications	213	(1)
Multioutlet Assembly	213	(1)
Nonmetallic Extensions	214	(1)
General	214	(1)
Installation	214	(1)
Strut-Type Channel Raceway	215	(1)
General	215	(1)
Installation	215	(1)
Construction Specifications	216	(1)
Surface Metal Raceways	216	(1)
General	216	(1)
Installation	216	(1)
Construction Specifications	217	(1)
Surface Nonmetallic Raceways	217	(1)
General	217	(1)
Installation	217	(1)
Construction Specifications	218	(1)
Underfloor Raceways	218	(1)
Cable Trays	219	(6)
Concealed Knob-and-Tube Wiring	225	(2)
General	225	(1)
Installation	226	(1)
Construction Specifications	226	(1)
Messenger Supported Wiring	227	(1)
General	227	(1)
Installation	227	(1)
Open Wiring on Insulators	227	(4)
General	227	(1)
Installation	227	(2)
Construction Specifications	229	(2)
Equipment for General Use
Flexible Cords and Cables	231	(10)
General	231	(8)
Construction Specifications	239	(1)
Portable Cables Over 600 Volts, Nominal	240	(1)
Fixture Wires	241	(3)
Switches	244	(3)
Installation	244	(3)
Construction Specifications	247	(1)
Receptacles, Cord Connectors, and Attachment Plugs (Caps)	247	(3)
Switchboards and Panelboards	250	(4)
General	250	(1)
Switchboards	251	(1)
Panelboards	252	(1)
Construction Specifications	253	(1)
Luminaires (Lighting Fixtures), Lampholders, and Lamps	254	(10)
General	254	(1)
Luminaire (Fixture) Locations	254	(1)
Provisions at Luminaire (Fixture) Outlet Boxes, Canopies, and Pans	255	(1)
Luminaire (Fixture) Supports	256	(1)
Grounding	257	(1)
Wiring of Luminaires (Fixtures)	257	(2)
Construction of Luminaires (Fixtures)	259	(1)
Installation of Lampholders	260	(1)
Construction of Lampholders	260	(1)
Lamps and Auxiliary Equipment	260	(1)
Special Provisions for Flush and Recessed Luminaires (Fixtures)	260	(1)
Construction of Flush and Recessed Luminaires (Fixtures)	261	(1)
Special Provisions for Electric-Discharge Lighting Systems of 1000 Volts or Less	261	(1)
Special Provisions for Electric-Discharge Lighting Systems of More Than 1000 Volts	262	(1)
Lighting Track	263	(1)
Lighting Systems Operating at 30 Volts or Less	264	(1)
Appliances	264	(5)
General	264	(1)
Installation	264	(3)
Disconnecting Means	267	(1)
Construction	267	(1)
Marking	268	(1)
Fixed Electric Space-Heating Equipment	269	(9)
General	269	(1)
Installation	269	(1)
Control and Protection of Fixed Electric Space-Heating Equipment	270	(2)
Marking of Heating Equipment	272	(1)
Electric Space-Heating Cables	272	(2)
Duct Heaters	274	(1)
Resistance-Type Boilers	274	(1)
Electrode-Type Boilers	275	(1)
Electric Radiant Heating Panels and Heating Panel Sets	276	(2)
Fixed Outdoor Electric Deicing and Snow-Melting Equipment	278	(3)
General	278	(1)
Installation	279	(1)
Resistance Heating Elements	279	(1)
Impedance Heating	280	(1)
Skin-Effect Heating	280	(1)
Control and Protection	281	(1)
Fixed Electric Heating Equipment for Pipelines and Vessels	281	(3)
General	281	(1)
Installation	282	(1)
Resistance Heating Elements	282	(1)
Impedance Heating	283	(1)
Induction Heating	283	(1)
Skin-Effect Heating	283	(1)
Control and Protection	284	(1)
Motors, Motor Circuits, and Controllers	284	(28)
General	284	(6)
Motor Circuit Conductors	290	(2)
Motor and Branch-Circuit Overload Protection	292	(3)
Motor Branch-Circuit Short-Circuit and Ground-Fault Protection	295	(3)
Motor Feeder Short-Circuit and Ground-Fault Protection	298	(1)
Motor Control Circuits	299	(2)
Motor Controllers	301	(1)
Motor Control Centers	302	(2)
Disconnecting Means	304	(3)
Over 600 Volts, Nominal	307	(1)
Protection of Live Parts---All Voltages	308	(1)
Grounding---All Voltages	308	(1)
Tables	309	(3)
Air-Conditioning and Refrigerating Equipment	312	(7)
General	312	(2)
Disconnecting Means	314	(1)
Branch-Circuit Short-Circuit and Ground-Fault Protection	315	(1)
Branch-Circuit Conductors	316	(1)
Controllers for Motor-Compressors	316	(1)
Motor-Compressor and Branch-Circuit Overload Protection	317	(1)
Provisions for Room Air Conditioners	318	(1)
Generators	319	(1)
Transformers and Transformer Vaults (Including Secondary Ties)	320	(7)
General Provisions	320	(4)
Specific Provisions Applicable to Different Types of Transformers	324	(2)
Transformer Vaults	326	(1)
Phase Converters	327	(2)
General	327	(1)
Specific Provisions Applicable to Different Types of Phase Converters	328	(1)
Capacitors	329	(1)
600 Volts, Nominal, and Under	329	(1)
Over 600 Volts, Nominal	329	(1)
Resistors and Reactors (For Rheostats, See 430.82.)	330	(1)
600 Volts, Nominal, and Under	330	(1)
Over 600 Volts, Nominal	331	(1)
Storage Batteries	331	(1)
Equipment, Over 600 Volts, Nominal	332	(7)
General	332	(1)
Equipment---Specific Provisions	332	(3)
Equipment---Metal-Enclosed Power Switchgear and Industrial Control Assemblies	335	(2)
Mobile and Portable Equipment	337	(1)
Electrode-Type Boilers	337	(2)
Special Occupancies
Hazardous (Classified) Locations, Classes I, II, and III, Divisions 1 and 2	339	(8)
Class I Locations	347	(9)
Class II Locations	356	(6)
Class III Locations	362	(2)
Intrinsically Safe Systems	364	(3)
Class I, Zone 0, 1, and 2 Locations	367	(13)
Hazardous (Classified) Locations---Specific	380	(1)
Commercial Garages, Repair and Storage	380	(2)
Aircraft Hangars	382	(3)
Motor Fuel Dispensing Facilities	385	(4)
Bulk Storage Plants	389	(4)
Spray Application, Dipping, and Coating Processes	393	(6)
Health Care Facilities	399	(18)
General	399	(3)
Wiring and Protection	402	(3)
Essential Electrical System	405	(6)
Inhalation Anesthetizing Locations	411	(3)
X-Ray Installations	414	(1)
Communications, Signaling Systems, Data Systems, Fire Alarm Systems, and Systems Less Than 120 Volts, Nominal	415	(1)
Isolated Power Systems	416	(1)
Places of Assembly	417	(1)
Theaters, Audience Areas of Motion Picture and Television Studios, Performance Areas, and Similar Locations	418	(9)
General	418	(1)
Fixed Stage Switchboards	419	(2)
Fixed Stage Equipment Other Than Switchboards	421	(1)
Portable Switchboards on Stage	422	(3)
Portable Stage Equipment Other Than Switchboards	425	(1)
Dressing Rooms	426	(1)
Grounding	426	(1)
Carnivals, Circuses, Fairs, and Similar Events	427	(2)
General Requirements	427	(1)
Power Sources	427	(1)
Wiring Methods	427	(1)
Grounding and Bonding	428	(1)
Temporary Installations	429	(1)
Motion Picture and Television Studios and Similar Locations	430	(4)
General	430	(1)
Stage or Set	431	(2)
Dressing Rooms	433	(1)
Viewing, Cutting, and Patching Tables	434	(1)
Cellulose Nitrate Film Storage Vaults	434	(1)
Substations	434	(1)
Motion Picture Projection Rooms	434	(2)
General	434	(1)
Equipment and Projectors of the Professional Type	434	(1)
Nonprofessional Projectors	435	(1)
Audio Signal Processing, Amplification, and Reproduction Equipment	435	(1)
Manufactured Buildings	436	(1)
Agricultural Buildings	437	(2)
Mobile Homes, Manufactured Homes, and Mobile Home Parks	439	(10)
General	439	(1)
Mobile and Manufactured Homes	440	(7)
Services and Feeders	447	(2)
Recreational Vehicles and Recreational Vehicle Parks	449	(14)
General	449	(1)
Low-Voltage Systems	450	(2)
Combination Electrical Systems	452	(1)
Other Power Sources	452	(1)
Nominal 120- Volt or 120/240-Volt Systems	453	(7)
Factory Tests	460	(1)
Recreational Vehicle Parks	460	(3)
Park Trailers	463	(9)
General	463	(1)
Low-Voltage Systems	463	(1)
Combination Electrical Systems	464	(1)
Nominal 120- Volt or 120/240- Volt Systems	465	(7)
Factory Tests	472	(1)
Floating Buildings	472	(1)
General	472	(1)
Services and Feeders	472	(1)
Grounding	472	(1)
Marinas and Boatyards	473	(4)
Special Equipment
Electric Signs and Outline Lighting	477	(4)
General	477	(3)
Field-Installed Skeleton Tubing	480	(1)
Manufactured Wiring Systems	481	(1)
Office Furnishings (Consisting of Lighting Accessories and Wired Partitions)	482	(1)
Cranes and Hoists	483	(5)
General	483	(1)
Wiring	483	(3)
Contact Conductors	486	(1)
Disconnecting Means	487	(1)
Overcurrent Protection	487	(1)
Control	488	(1)
Grounding	488	(1)
Elevators, Dumbwaiters, Escalators, Moving Walks, Wheelchair Lifts, and Stairway Chair Lifts	488	(10)
General	488	(2)
Conductors	490	(1)
Wiring	491	(3)
Installation of Conductors	494	(1)
Traveling Cables	494	(1)
Disconnecting Means and Control	495	(1)
Overcurrent Protection	496	(1)
Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces	497	(1)
Grounding	497	(1)
Emergency and Standby Power Systems	497	(1)
Electric Vehicle Charging System	498	(4)
General	498	(1)
Wiring Methods	498	(1)
Equipment Construction	499	(1)
Control and Protection	499	(1)
Electric Vehicle Supply Equipment Locations	500	(2)
Electric Welders	502	(2)
General	502	(1)
Arc Welders	502	(1)
Resistance Welders	503	(1)
Welding Cable	504	(1)
Audio Signal Processing, Amplification, and Reproduction Equipment	504	(5)
General	504	(3)
Permanent Audio System Installations	507	(1)
Portable and Temporary Audio System Installations	508	(1)
Information Technology Equipment	509	(2)
Sensitive Electronic Equipment	511	(1)
Pipe Organs	512	(1)
X-Ray Equipment	513	(2)
General	513	(1)
Control	514	(1)
Transformers and Capacitors	514	(1)
Guarding and Grounding	514	(1)
Induction and Dielectric Heating Equipment	515	(1)
General	515	(1)
Guarding, Grounding, and Labeling	516	(1)
Electrolytic Cells	516	(3)
Electroplating	519	(1)
Industrial Machinery	520	(1)
Electrically Driven or Controlled Irrigation Machines	521	(2)
General	521	(2)
Center Pivot Irrigation Machines	523	(1)
Swimming Pools, Fountains, and Similar Installations	523	(14)
General	523	(3)
Permanently Installed Pools	526	(6)
Storable Pools	532	(1)
Spas and Hot Tubs	533	(2)
Fountains	535	(1)
Pools and Tubs for Therapeutic Use	536	(1)
Hydromassage Bathtubs	537	(1)
Integrated Electrical Systems	537	(1)
General	537	(1)
Orderly Shutdown	538	(1)
Solar Photovoltaic Systems	538	(9)
General	538	(2)
Circuit Requirements	540	(2)
Disconnecting Means	542	(1)
Wiring Methods	543	(1)
Grounding	544	(1)
Marking	545	(1)
Connection to Other Sources	545	(1)
Storage Batteries	546	(1)
Systems Over 600 Volts	547	(1)
Fuel Cell Systems	547	(3)
General	547	(1)
Circuit Requirements	548	(1)
Disconnecting Means	549	(1)
Wiring Methods	549	(1)
Grounding	549	(1)
Marking	549	(1)
Connection to Other Circuits	549	(1)
Outputs Over 600 Volts	550	(1)
Fire Pumps	550	(5)
Special Conditions
Emergency Systems	555	(4)
General	555	(1)
Circuit Wiring	556	(1)
Sources of Power	557	(1)
Emergency System Circuits for Lighting and Power	558	(1)
Control---Emergency Lighting Circuits	559	(1)
Overcurrent Protection	559	(1)
Legally Required Standby Systems	559	(3)
General	559	(1)
Circuit Wiring	560	(1)
Sources of Power	561	(1)
Overcurrent Protection	562	(1)
Optional Standby Systems	562	(1)
General	562	(1)
Circuit Wiring	563	(1)
Grounding	563	(1)
Interconnected Electric Power Production Sources	563	(2)
Circuits and Equipment Operating at Less Than 50 Volts	565	(1)
Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits	565	(9)
General	565	(1)
Class 1 Circuits	566	(2)
Class 2 and Class 3 Circuits	568	(6)
Instrumentation Tray Cable: Type ITC	574	(1)
Fire Alarm Systems	575	(8)
Non--Power-Limited Fire Alarm (NPLFA) Circuits	576	(3)
Power-Limited Fire Alarm (PLFA) Circuits	579	(4)
Optical Fiber Cables and Raceways	583	(1)
General	583	(6)
Protection	584	(1)
Cables Within Buildings	584	(3)
Closed-Loop and Programmed Power Distribution	587	(2)
Communications Systems
Communications Circuits	589	(8)
General	589	(1)
Conductors Outside and Entering Buildings	590	(1)
Protection	591	(1)
Grounding Methods	592	(1)
Communications Wires and Cables Within Buildings	593	(4)
Radio and Television Equipment	597	(4)
General	597	(1)
Receiving Equipment---Antenna Systems	598	(2)
Amateur Transmitting and Receiving Stations---Antenna Systems	600	(1)
Interior Installation---Transmitting Stations	601	(1)
Community Antenna Television and Radio Distribution Systems	601	(6)
General	601	(1)
Cables Outside and Entering Buildings	602	(1)
Protection	603	(1)
Grounding Methods	603	(1)
Cables Within Buildings	604	(3)
Network-Powered Broadband Communications Systems	607	(10)
General	607	(2)
Cables Outside and Entering Buildings	609	(3)
Protection	612	(1)
Grounding Methods	613	(1)
Wiring Methods Within Buildings	614	(3)
Tables
Percent of Cross Section of Conduit and Tubing for Conductors	617	(1)
Dimensions and Percent Area of Conduit and Tubing (Areas of Conduit or Tubing for the Combinations of Wires Permitted in Table 1, Chapter 9)	617	(5)
Dimensions of Insulated Conductors and Fixture Wires	622	(2)
Compact Aluminum Building Wire Nominal Dimensions and Areas	624	(1)
Conductor Properties	625	(1)
Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F)---Three Single Conductors in Conduit	626	(2)
Class 2 and Class 3 Alternating-Current Power Source Limitations	628	(1)
Class 2 and Class 3 Direct-Current Power Source Limitations	628	(1)
PLFA Alternating-Current Power Source Limitations	629	(1)
PLFA Direct-Current Power Source Limitations	629	(52)
Annex A	631	(4)
Annex B	635	(10)
Annex C	645	(22)
Annex D	667	(8)
Annex E	675	(2)
Annex F	677	(4)
Index	681