Illustrated Guide to the 1999 National Electrical Code

Chapter 1
About the NEC, 7
     Purpose and History of the NEC, 7
     NEC Terminology, 7
     Learning the NEC Layout, 8
     Wiring Design and Protection, 10
     Wiring Methods and Materials, 10
     Equipment for General Use, 11
     Special Occupancies, 11
     Special Equipment, 12
     Special Conditions, 12
     Definitions, 13
     Testing Laboratories, 14
     Major Changes to the 1999 NEC, 16

Chapter 2
Electric Services, 27
     Sizing the Service, 29
     Single and Multifamily Dwellings, 34
     Sizing Neutral Conductors, 39
     Sizing the Load Center, 40
     Optional Calculations for Single-Family Dwellings, 42
     Multifamily Dwelling Calculations, 42
     Commercial Occupancy Calculations, 44
     Retail Stores with Show Windows, 45
     Office Building, 46
     Mobile Home and RV Parks, 51
     Restaurants, 59
     Services for Hotels and Motels, 59
     Optional Calculation for Schools, 59
     Shore Power Circuits for Marinas and Boatyards, 61
     Farm Load Calculations, 61
     Industrial Motor-Control Center, 63
     Underground Systems, 67
     Service Clearances, 75
     Service Components, 76
     Material Take-Off, 82

Chapter 3
Service Equipment and Grounding, 89
     Safety Switches, 90
     Heavy-Duty Switches, 91
     General-Duty Switches, 95
     Double-Throw Safety Switches, 96
     NEC Safety-Switch Requirements, 97
     Panelboards, 97
     Current Transformers, 102
     Gutters, 104
     Grounding, 105

Chapter 4
Overcurrent Protection, 111
     Plug Fuses, 111
     Cartridge Fuses, 112
     Conductor Protection, 114
     Circuit Breakers, 118

Chapter 5
Branch Circuits and Feeders, 121
     Boxes, 121
     Conduit Bodies, Pull Boxes and Junction Boxes, 125
     Wiring Methods, 132
     Identifying Conductors, 142
     Locating Outlets, 142
     Ground-Fault Circuit-Interrupters, 147

Chapter 6
Utilization Equipment, 149
     Air-Conditioning and Refrigeration, 151
     Equipment Appliances, 154
     Capacitors, 157
     Computer/Data Processing, 157
     Miscellaneous Electric Equipment, 157
     Elevators, Escalators, Moving Walks and Dumbwaiters, 158
     Fire Pumps, 158
     Fixed Electric Space Heating, 160
     Forced-Air Systems, 167
     Electric Lighting, 168

Chapter 7
Miscellaneous Electrical Systems, 173
     Electric Signs and Outline Lighting, 173
     Electric Vehicle Charging Systems, 175
     Electric Welders, 175
     Audio Signal, Processing, Amplification and
           Reproduction Equipment, 179
     Industrial Machinery, 179
     Cable Tray, 180
     Industrial and Dielectric Heating Equipment, 188
     Electronic Computer/Data-Processing Systems, 189
     Swimming Pools, 189

Chapter 8
Signaling Systems, 195
     Classification of Signal Circuits, 196
     Fire-Alarm Systems, 199
     Components of Security/Fire Alarm System, 203

Chapter 9
Electric Motors and Controllers, 209
     Polyphase Motors, 212
     Three-Phase Motor Basics, 213
     Calculating Motor Circuit Conductors, 218
     Motor Protective Devices, 222
     Circuit Breakers, 230
     Multimotor Branch Circuits, 232
     Power-Factor Correction at Motor Terminals, 234
     Motor Controllers, 235
     Controller Components and Related Graphic Symbols, 237

Chapter 10
Transformers, 241
     Transformer Basics, 241
     Transformer Construction, 244
     Transformer Taps, 248
     Transformer Connections – Basic, 249
     Autotransformers, 252
     Parallel Operation of Transformers, 253
     Transformer Connections - Dry Type, 256
     Buck-and-Boost Transformers, 258
     Control Transformers, 264
     Potential and Current Transformers, 264
     NEC Requirements, 265
     Transformer Grounding, 270

Chapter 11
Capacitors, Resistors and Reactors, 275
     Power Factor, 275
     Capacitors, 278
     Resistors and Reactors, 281

Chapter 12
Special Occupancies, 283
     Introduction to Hazardous Locations, 283
     Prevention of External Ignition/Explosion, 288
     Explosionproof Equipment, 290
     Seals and Drains, 292
     Garages and Similar Locations, 296
     Airport Hangars, 296
     Theaters, 300
     Health Care Facilities, 300
     Petro/Chemical Hazardous Locations, 300
     Manufacturers' Data, 301

Appendix: Electrical Wiring Symbols, 303
Glossary, 316
Index, 351