AS/NZS 3000:2018 Wiring Rules

AS/NZS 3000:2018 WIRING RULES......Page 1
PREFACE......Page 5
CONTENTS......Page 12
LIST OF TABLES......Page 23
LIST OF FIGURES......Page 26
FOREWORD......Page 33
1.2 APPLICATION......Page 36
1.4.6 Adjacent......Page 37
1.4.15 Area, hazardous......Page 38
1.4.20 Barrier......Page 39
1.4.30 Circuit-breaker......Page 40
1.4.32 Class II equipment......Page 41
1.4.39 Contact, indirect......Page 42
1.4.47 Earthed......Page 43
1.4.51 Electrical fault......Page 44
1.4.57 Electricity distributor......Page 45
1.4.62 Exposed conductive part......Page 46
1.4.66 Functional earthing (FE)......Page 47
1.4.73 Insulation system......Page 48
1.4.77 Lift......Page 49
1.4.83 Multiple earthed neutral (MEN) system......Page 50
1.4.91 Plug......Page 51
1.4.100 Protective earthing conductor......Page 52
1.4.107 Shall......Page 53
1.4.115 Subcircuit, final......Page 54
1.4.122 Switchboard, main......Page 55
1.4.130 Wiring enclosure......Page 56
1.5.1 Protection against dangers and damage......Page 57
1.5.3 Protection against electric shock......Page 58
1.5.4 Basic protection......Page 59
1.5.5 Fault protection......Page 62
1.5.6 Additional protection by the use of RCDs......Page 65
1.5.8 Protection against thermal effects in normal service......Page 66
1.5.11 Protection against abnormal voltages......Page 67
1.5.12 Protection against the spread of fire......Page 68
1.6.1 General......Page 69
1.6.4 Utilization voltage......Page 70
1.7.2 Installation work practice......Page 71
1.7.3 Equipment selection......Page 72
1.8 VERIFICATION (INSPECTION AND TESTING)......Page 73
1.9.4 Compliance by specific design and installation......Page 74
2.2.1 Circuits......Page 78
2.2.2 Maximum demand......Page 80
2.2.4 Operating characteristics of equipment......Page 81
2.3.1 General......Page 82
2.3.2 Common control requirements......Page 83
2.3.3 Main switches......Page 86
2.3.4 Additional isolating switches......Page 89
2.3.5 Emergency switching including emergency stopping......Page 91
2.3.6 Shutting down for mechanical maintenance......Page 93
2.3.7 Functional (control) switching......Page 94
2.4.2 Protection by automatic disconnection of supply......Page 95
2.5.1 General......Page 96
2.5.2 Devices for protection against both overload and short-circuit currents......Page 99
2.5.3 Protection against overload current......Page 100
2.5.4 Protection against short-circuit current......Page 102
2.5.5 Protection against switchboard internal arcing fault currents......Page 111
2.5.6 Coordination of overload and short-circuit protective devices......Page 114
2.5.7 Reliability of supply......Page 115
2.6.1 General......Page 122
2.6.2 Selection and arrangement of devices......Page 123
2.6.3 Additional protection by residual current devices......Page 126
2.7.1 General......Page 133
2.8.1 General......Page 134
2.8.2 Selection of protective device......Page 135
2.9.6 Final subcircuits in Australia......Page 136
2.10.1 General......Page 137
2.10.2 Location of switchboards......Page 138
2.10.3 Construction......Page 146
2.10.4 Bars......Page 148
2.10.5 Equipment identification......Page 149
2.10.7 Fire-protective measures......Page 151
3.2 TYPES OF WIRING SYSTEMS......Page 152
3.3.2 Particular influences......Page 153
3.4.1 General......Page 158
3.4.2 Operating temperature limits......Page 159
3.4.3 Conductors in parallel......Page 161
3.5.1 General......Page 162
3.5.2 Neutral conductor......Page 163
3.6.2 Value......Page 165
3.7.2 Connection methods......Page 166
3.8.1 General......Page 170
3.8.2 Colour identification......Page 171
3.8.3 Exceptions and special applications......Page 172
3.9.1 General......Page 174
3.9.3 Support and fixing......Page 175
3.9.4 Protection against mechanical damage......Page 176
3.9.7 Particular installation requirements......Page 180
3.9.8 Prevention of mutual detrimental effects between services......Page 184
3.9.9 Selection and installation to minimize the spread of fire......Page 187
3.9.10 Limitation of circulating and eddy currents......Page 190
3.9.11 Minimization of electromagnetic interference......Page 191
3.10.2 Wiring enclosures......Page 192
3.10.3 Installation of wiring enclosures......Page 193
3.11.2 Classification of wiring systems......Page 195
3.11.3 Arrangements......Page 196
3.11.4 Installation requirements......Page 199
3.11.5 Spacing from other underground services......Page 206
3.12.3 Clearances......Page 207
3.12.5 Aerial conductor supports......Page 210
3.12.6 Poles and posts (including supports, struts and extensions to structures)......Page 211
3.14 SAFETY SERVICES......Page 212
3.16 EARTH SHEATH RETURN (ESR) SYSTEM......Page 213
4.1.2 Selection and installation......Page 215
4.1.3 External influences......Page 216
4.1.4 Adverse effects and interference......Page 218
4.2.2 Prevention of fire hazard......Page 219
4.3.1 General......Page 221
4.3.2 Direct connection......Page 222
4.3.3 Installation wiring connected by an installation coupler(s)......Page 223
4.3.5 Other connecting devices......Page 224
4.3.6 Equipment wiring......Page 225
4.4.1 Types......Page 226
4.4.2 Location......Page 228
4.4.4 Switching device......Page 229
4.5.1 Lampholders, including lampholders incorporated in a luminaire......Page 231
4.5.2 Lamps and luminaires......Page 232
4.7.1 Switching device......Page 246
4.7.3 Clearance from open cooking surfaces......Page 247
4.8.1 General......Page 248
4.9.1 General......Page 249
4.10.2 Heating cables......Page 250
4.10.6 Signs......Page 251
4.12.2 Selection and installation......Page 252
4.12.4 Isolation......Page 253
4.12.5 Overcurrent protection......Page 254
4.12.8 Electrical equipment connected to output......Page 255
4.13.1 Protection against injury from mechanical movement......Page 256
4.13.2 Protection against overload......Page 257
4.13.3 Protection against overtemperature......Page 258
4.14.2 Secondary circuit......Page 259
4.15.2 Electrical equipment......Page 260
4.15.3 Provision for discharge and control......Page 261
4.18.1 Gas appliances......Page 263
4.18.2 Gas cylinders containing heavier-than-air gases-Outdoors......Page 264
4.18.4 Gas relief vent terminal-Natural gas, LP Gas or Biogas......Page 265
4.18.5 Reticulated lighter-than-air gas system, metering system and regulators-New Zealand only......Page 266
4.19 AIRCONDITIONING AND HEAT PUMP SYSTEMS......Page 267
4.20.4 Motor-room-less lifts (MRLs)......Page 268
5.1.3 MEN earthing system......Page 270
5.1.4 Other earthing systems......Page 273
5.2.2 Functional earthing (FE)......Page 274
5.3.1 General......Page 275
5.3.2 Earthing conductor material and type......Page 276
5.3.3 Earthing conductor size (cross-sectional area)......Page 279
5.3.4 Main earthing terminal/connection or bar......Page 283
5.3.5 MEN connection......Page 284
5.3.6 Earth electrodes......Page 285
5.4.1 General......Page 287
5.4.4 Luminaires......Page 289
5.4.6 Structural metalwork including conductive building materials......Page 290
5.4.8 Variable frequency devices......Page 291
5.5.1 Main earthing conductor......Page 292
5.5.2 Protective earthing conductors......Page 293
5.5.3 Particular methods of earthing......Page 296
5.5.4 Continuity......Page 303
5.5.5 Installation......Page 304
5.5.6 Connections......Page 305
5.6.1 General......Page 306
5.6.2 Arrangement......Page 307
5.6.3 Bonding conductors......Page 314
5.7.1 General......Page 315
5.7.3 Earth fault-loop......Page 316
5.7.5 Supplementary equipotential bonding......Page 317
5.8 OTHER EARTHING ARRANGEMENTS......Page 318
6.1.2 Selection and installation......Page 319
6.2.2 Classification of zones......Page 320
6.2.4 Selection and installation of electrical equipment......Page 323
6.3.1 Scope......Page 339
6.3.2 Classification of zones......Page 340
6.3.3 Protection against electric shock......Page 341
6.3.4 Selection and installation of electrical equipment......Page 342
6.4.1 Scope......Page 351
6.4.3 Protection against electric shock......Page 352
6.4.4 Selection and installation of electrical equipment......Page 353
6.5.2 Classification of zones......Page 357
6.5.4 Selection and installation of electrical equipment......Page 358
6.6.3 Selection and installation of electrical equipment......Page 361
6.7.2 Classification of zone......Page 363
6.7.4 Selection and installation of electrical equipment......Page 364
7.1.2 Selection and installation......Page 365
7.2.1 Scope and general......Page 366
7.2.2 Supply systems......Page 367
7.2.3 Main switchboard and switchgear......Page 370
7.2.4 Main switches......Page 374
7.2.5 Fire pumps and fire pump control equipment......Page 376
7.2.6 Fire and smoke detection equipment and fire alarm systems......Page 380
7.2.7 Air-handling systems......Page 381
7.2.8 Evacuation equipment......Page 382
7.2.9 Emergency lifts......Page 383
7.2.10 Emergency motor-room-less lifts......Page 385
7.3.1 General......Page 387
7.3.3 Control......Page 388
7.3.4 Isolation......Page 389
7.3.5 Overcurrent protection......Page 390
7.3.7 Connected electrical equipment......Page 391
7.3.8 Connection to electrical installation......Page 392
7.4.2 Source of supply......Page 400
7.4.6 Supply to multiple items of electrical equipment......Page 401
7.4.8 Testing......Page 402
7.5.3 Sources of supply to SELV and PELV systems......Page 405
7.5.5 Arrangement of SELV circuits......Page 406
7.5.7 Voltage drop in conductors......Page 407
7.5.9 Overcurrent protection......Page 408
7.5.12 Testing......Page 409
7.6.2 Application......Page 410
7.7.2 Classification of hazardous areas......Page 411
7.8.1 Scope......Page 412
7.8.2 Standards containing additional requirements......Page 413
7.8.3 Standards containing guidance......Page 415
7.9.2 System of supply......Page 416
7.9.3 Residential electrical installations......Page 417
7.9.4 Non-residential electrical installations......Page 418
8.1.3 Periodic inspection and testing......Page 419
8.2.2 Checklist......Page 420
8.3.2 Test methods......Page 422
8.3.4 Sequence of tests......Page 423
8.3.5 Continuity of the earthing system......Page 424
8.3.6 Insulation resistance......Page 425
8.3.7 Polarity......Page 426
8.3.8 Correct circuit connections......Page 427
8.3.9 Verification of earth fault-loop impedance (EFLI)......Page 428
8.3.10 Operation of RCDs......Page 431
8.4 VERIFICATION RECORDS......Page 432
APPENDIX A - REFERENCED DOCUMENTS......Page 433
B2 CIRCUIT ARRANGEMENTS......Page 442
B3.2 Coordination between conductors and overload protective devices......Page 444
B4.2 Principle......Page 446
B4.3 Disconnection times......Page 447
B4.4 The earth fault-loop......Page 450
B4.5 Calculation of earth fault-loop impedance......Page 452
B5.2 Calculation of maximum length of circuit......Page 453
C2.1 After diversity maximum demand......Page 459
C2.3 Domestic installations......Page 460
C2.4 Non-domestic installations......Page 469
C2.5 Maximum demand in final subcircuits......Page 478
C3 SIMPLIFIED PROTECTIVE DEVICE SELECTION......Page 480
C4.1 Background......Page 482
C4.2 Examples......Page 484
C5.2 Final subcircuits......Page 485
C6.3 Application notes......Page 489
D1.2 Using the tables in this Appendix......Page 494
D2.1 Sinking of posts/poles in ground......Page 495
D2.3 Steel-pipe posts/poles......Page 496
D3.2 Horizontal and vertical struts......Page 497
D4.2 Solution......Page 498
E2.1 General......Page 516
E2.2 Principles of classification......Page 517
E2.3 Provisions in the NCC......Page 519
E3.1 General......Page 521
E3.2 Extent of electrical installations in the NZBC......Page 522
E3.3 Building consents......Page 523
F1.2 Selection and installation of SPDs......Page 524
F2 SURGE PROTECTIVE EARTHING AND BONDING......Page 528
APPENDIX G - DEGREES OF PROTECTION OF ENCLOSED EQUIPMENT......Page 530
H1.2 Designation......Page 535
H1.4 Second characteristic numeral......Page 536
H2.1 Building Code......Page 537
H2.2 Equipment installation Standards......Page 538
H4.2 Application of wiring systems......Page 539
H4.4 Enclosed wiring systems......Page 540
H5.3 WSX2 mechanical protection systems......Page 541
H5.4 WSX3 mechanical protection systems......Page 542
I2 PROTECTIVE DEVICE RATINGS......Page 543
I3 METRIC EQUIVALENT SIZES FOR IMPERIAL CONDUCTORS......Page 544
APPENDIX J - SYMBOLS USED IN THIS STANDARD......Page 546
K2.1 General......Page 548
K4.2 Items subject to agreement......Page 549
K5 CORRESPONDING PROVISIONS OF THIS STANDARD AND THE AS/NZS 61439 SERIES......Page 550
K6.2 Form of internal separation......Page 551
K6.8 Current rating by testing and temperature limits......Page 554
K7.2 Ratings......Page 556
K8.2 Additional marking for DBO......Page 557
K10.1 General......Page 558
K11 REPAIRS TO EXISTING SWITCHBOARDS......Page 559
K12 ROUTINE VERIFICATION BY THE SWITCHBOARD MANUFACTURER......Page 560
APPENDIX L - (Deleted)......Page 561
M2 ARRANGEMENTS......Page 562
N2 MARKING OF AS/NZS 2053 SERIES AND AS/NZS 61386 SERIES CONDUITS......Page 564
N3 CLASSIFICATIONS......Page 565
O1 GENERAL......Page 568
O2 CHARACTERISTICS OF AFDDs......Page 569
O4.4 Overvoltage protection......Page 570
P1.3 Additional requirements and tests......Page 571
P1.5 Definitions......Page 572
P3.2 External Influences......Page 573
P5.1 Socket-outlets and vehicle connectors......Page 574
P5.4 Types of connection......Page 575
P7 PERIODIC VERIFICATION......Page 577
Q4.1 Polarized......Page 578
Q7 SWITCHBOARD LOCATIONS......Page 579
Q9 INVERTERS......Page 580
INDEX......Page 581