Nec Electrical Code

Front 1

100

Back 1

Definitions

Front 2

110

Back 2

Requirements for electrical installation

Front 3

200

Back 3

Use and identification of grounded conductors

Front 4

210

Back 4

Branch circuits

Front 5

215

Back 5

Feeders

Front 6

220

Back 6

Branch circuit,feeders,and service load calculations

Front 7

225

Back 7

outside branch circuits and feeders

Front 8

230

Back 8

Services

Front 9

240

Back 9

Overcurrent protection

Front 10

250

Back 10

Grounding and bonding

Front 11

280

Back 11

Surge arresters over 1,000 volts

Front 12

285

Back 12

Surge protective devices 1000 volts or less

Front 13

310

Back 13

Conductors for General wiring

Front 14

312

Back 14

Cabinets cut out boxes and meter socket enclosures

Front 15

314

Back 15

Outlet, device, pull, and junction boxes; conduit bodies, fittings, and handhole enclosures

Front 16

320

Back 16

Armored cable: type AC

Front 17

324

Back 17

Flat conductor cable: type FCC

Front 18

322

Back 18

Flat cable assemblies: type FC

Front 19

326

Back 19

Integrated gas spacer cable: type IGS

Front 20

328

Back 20

Medium voltage cable: type MV

Front 21

330

Back 21

Metal-clad cable: type MC

Front 22

332

Back 22

Mineral-insulated, metal-sheathed cable: type MI

Front 23

334

Back 23

Nonmetallic-sheathed cable: types NM, NMC, and NMS

Front 24

336

Back 24

Power and control tray cable: type TC

Front 25

338

Back 25

Service-entrance cable: type SE and USE

Front 26

340

Back 26

Underground feeder and branch-circuit cable: type UF

Front 27

342

Back 27

Intermediate metal conduit: type IMC

Front 28

344

Back 28

Rigid metal conduit: type RMC

Front 29

348

Back 29

Flexible metal conduit: type FMC

Front 30

350

Back 30

Liquidtight flexible metal conduit: LFMC

Front 31

352

Back 31

Rigid polyvinyl chloride conduit: type HDPE conduit

Front 32

354

Back 32

Nonmetallic underground conduit with conductors: Type NUCC

Front 33

355

Back 33

Reinforced thermosetting resin conduit: type RTRC

Front 34

356

Back 34

Liquidtight flexible nonmetallic conduit: Type LFNC

Front 35

358

Back 35

Electrical metallic tubing: type EMT

Front 36

360

Back 36

Flexible metallic tubing: FMT

Front 37

362

Back 37

Electrical nonmetallic tubing: type ENT

Front 38

366

Back 38

Auxiliary gutters

Front 39

368

Back 39

Busways

Front 40

370

Back 40

Cablebus

Front 41

372

Back 41

Cellular concrete floor raceways

Front 42

374

Back 42

Cellular metal floor raceways

Front 43

376

Back 43

Metal wireways

Front 44

378

Back 44

Nonmetallic wireways

Front 45

380

Back 45

Multioutlet assembly

Front 46

382

Back 46

Nonmetallic wireways

Front 47

384

Back 47

Strut-type channel raceways

Front 48

386

Back 48

Surface metal raceways

Front 49

388

Back 49

Surface nonmetallic raceways

Front 50

390

Back 50

Underfloor raceways

Front 51

392

Back 51

Cable trays

Front 52

393

Back 52

Low-voltage suspended ceiling power distribution system

Front 53

394

Back 53

concealed knob-and-tube wiring

Front 54

396

Back 54

Messenger-supported wiring

Front 55

398

Back 55

Open wiring on insulators

Front 56

399

Back 56

Outdoor overhead conductors over 1000 volts

Front 57

400

Back 57

Flexible cords and flexible cables

Front 58

402

Back 58

Fixture wires

Front 59

404

Back 59

Switches

Front 60

406

Back 60

Receptacles, cord connectors, and attachment plugs (caps)

Front 61

408

Back 61

Switchboards, switchgear, and panelboards

Front 62

409

Back 62

Industrial control panels

Front 63

410

Back 63

Luminaries, lampholders, and lamps

Front 64

411

Back 64

Low-voltage lighting

Front 65

422

Back 65

Appliances

Front 66

424

Back 66

Fixed electric space-heating equipment

Front 67

425

Back 67

Fixed resistance and electrode industrial process heating equiptment

Front 68

426

Back 68

Fixed outdoor electric deicing and snow-melting equipment

Front 69

427

Back 69

Fixed electric heating equipment for pipelines and vessels

Front 70

430

Back 70

Motors, motor circuits, and controls

Front 71

440

Back 71

Air-conditioning and refrigerating equipment

Front 72

445

Back 72

Generators

Front 73

450

Back 73

Transformers and transformer vaults (including secondary ties)

Front 74

455

Back 74

Phase converters

Front 75

460

Back 75

Capacitors

Front 76

470

Back 76

Resistors and reactors

Front 77

480

Back 77

Storage batteries

Front 78

490

Back 78

Equipment over 1000 volts, nominal

Front 79

500

Back 79

Hazardous (classified) locations, classes 1, 2, and 3, divisions 1 and 2

Front 80

501

Back 80

Class 1 locations

Front 81

502

Back 81

Class 2 locations

Front 82

503

Back 82

Class 3 locations

Front 83

504

Back 83

Intrinsically safe systems

Front 84

505

Back 84

Zone 0, 1 and 2 locations

Front 85

506

Back 85

Zone 20, 21, and 22 locations for combustible dusts or ignitable fibers/flyings

Front 86

510

Back 86

Hazardous (classified) locations - specific

Front 87

511

Back 87

Commercial garages, repair and storage

Front 88

513

Back 88

Aircraft hangars

Front 89

514

Back 89

Motor fuel dispensing facilities

Front 90

515

Back 90

Bulk storage plants

Front 91

516

Back 91

Spray application, dipping, coating, and printing processes using flammable or combustible materials

Front 92

517

Back 92

Health care facilities

Front 93

518

Back 93

Assembly occupancies

Front 94

520

Back 94

Theaters, audience areas of motion picture and television studios, performances areas, and similar locations

Front 95

522

Back 95

Control systems for permanent amusement attractions

Front 96

525

Back 96

Carnivals, circuses, fairs, and similar events

Front 97

530

Back 97

Motion picture projection rooms

Front 98

540

Back 98

Motion picture projection rooms

Front 99

545

Back 99

Manufactured buildings

Front 100

547

Back 100

Agricultural buildings

Front 101

550

Back 101

Mobile homes, manufactured homes, and mobile home parks

Front 102

551

Back 102

Recreational vehicles and recreational vehicle parks

Front 103

552

Back 103

Park trailers

Front 104

553

Back 104

Floating buildings

Front 105

555

Back 105

Marinas, boatyards, and commercial and noncommercial docking facilities

Front 106

590

Back 106

Temporary installations

Front 107

600

Back 107

Electric signs and outline lighting

Front 108

604

Back 108

Manufactured wiring systems

Front 109

605

Back 109

Office furnishings

Front 110

610

Back 110

Cranes and hoists

Front 111

620

Back 111

Elevators, dumbwaiter, escalators, moving walks, platform lifts, and stairway chairlifts

Front 112

625

Back 112

Electric vehicle charging systems

Front 113

626

Back 113

Electrified truck parking spaces

Front 114

630

Back 114

Electric welders

Front 115

640

Back 115

Audio signal processing, amplification, and reproduction equipment

Front 116

645

Back 116

Information technology equipment

Front 117

646

Back 117

Modular data centers

Front 118

647

Back 118

Sensitive electronic equipment

Front 119

650

Back 119

Pipe organs

Front 120

660

Back 120

X-Ray equipment

Front 121

665

Back 121

Induction and dielectric heating equipment

Front 122

668

Back 122

Electrolytic cells

Front 123

669

Back 123

Electroplating

Front 124

670

Back 124

Industrial machinery

Front 125

675

Back 125

Electrically driven or controlled irrigation machines

Front 126

680

Back 126

Swimming pools, fountains, and similar installations

Front 127

682

Back 127

Natural and artificially made bodies of water

Front 128

685

Back 128

Integrated electrical systems

Front 129

690

Back 129

Solar photovoltaic (PV) systems

Front 130

691

Back 130

Large-scale photovoltaic (PV) electric power production facility

Front 131

692

Back 131

Fuel cell systems

Front 132

694

Back 132

Wind electric systems

Front 133

695

Back 133

Fire pumps

Front 134

700

Back 134

Emergency systems

Front 135

701

Back 135

Legally required standby systems

Front 136

702

Back 136

Optional standby systems

Front 137

705

Back 137

Interconnected electric power production sources

Front 138

706

Back 138

Energy storage systems

Front 139

708

Back 139

Critical operations power systems (COPS)

Front 140

710

Back 140

Stand-alone systems

Front 141

712

Back 141

Direct current microgrids

Front 142

720

Back 142

Circuits and equipment operating at less than 50 volts

Front 143

725

Back 143

Class 1, class2, and class 3 remote-control, signaling, and power-limited circuits

Front 144

727

Back 144

Instrumentation tray cable: type ITC

Front 145

728

Back 145

Fire-resistive cable systems

Front 146

750

Back 146

Energy management systems

Front 147

760

Back 147

Fire alarm systems

Front 148

770

Back 148

Optical fiber cables

Front 149

800

Back 149

Communications circuits

Front 150

810

Back 150

Radio and television equipment

Front 151

820

Back 151

Community antenna television and radio distribution systems

Front 152

830

Back 152

Network-powered broadband communications systems

Front 153

840

Back 153

Premises-powered broadband communications systems

Front 154

Informative annex A

Back 154

Product safety standards

Front 155

Informative annex B

Back 155

Application information for ampacity calculation

Front 156

Informative annex C

Back 156

Conduit and tubing fill tables for conductors and fixture wires of the same size

Front 157

Informative annex D

Back 157

Examples

Front 158

Informative annex E

Back 158

Types of contruction

Front 159

Informative annex F

Back 159

Availability and reliability for critical operations power systems; and development and implementation of functional performance tests (FPTs) for critical operations power systems

Front 160

Informative annex G

Back 160

Supervisory control and data acquisition (SCADA)

Front 161

Informative annex H

Back 161

Administration and enforcement

Front 162

Informative annex I

Back 162

Recommended tightening torque tables from UL standard 486A-B

Front 163

Informative annex J

Back 163

ADA standards for accessible design

Front 164

300

Back 164

General requirements for wiring methods and materials