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A Practical Guide to The Wiring Regulations – 17th Edition IEE Wiring Regulations (BS 7671:2008) 4e

J Stokes (Autor)

Software / Digital Media
616 Seiten
2009
Wiley-Blackwell (Hersteller)
978-0-470-74286-0 (ISBN)
CHF 85,15 inkl. MwSt
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This book provides a thorough, practical guide to the Wiring Regulations, BS 7671. It gives particular attention to the subjects of inspection, testing, verification, certification and reporting. It has been revised to include the extensive 2008 revisions to the regulations.
This best-selling text has been revised to reflect the requirements of the 17th Edition of the IEEWiring Regulations (BS 7671: 2008). It includes essential information on the new rules applied to special installations or locations, such as bathrooms, swimming pool locations, camping/caravan sites, marinas, exhibition and show locations, solar photovoltaic power supply systems, and floor and ceiling heating systems, amongst others.
It presents clear explanations on inspection, testing, certification and reporting, test instruments and test methods, as well as covering:* electricity, the law, standards and codes of practice;* assessment of general characteristics;* protection against electric shock, thermal effects, overcurrent, undervoltage and overvoltage;* isolation and switching;* the common rules of equipment selection;* switchgear, protective devices and other equipment;* wiring systems (including the external influences on them and cable installation methods);* protective conductors, earthing and protective bonding;* supplies for safety services;* the smaller installation, and;* specialised installations, such as outdoor lighting, installations in churches, multi-occupancy blocks of flats. These topics are addressed with pertinent regulation numbers, and a useful appendix lists the relevant Standards. Background guidance and worked examples are provided where appropriate.
Like the earlier editions of this text, this new edition will be a useful aid for designers, installers and verifiers of electrical installations, students of the industry wishing to gain better understanding of the many facets of electrical safety, and 'duty holders' as defined by the Electricity at Work Regulations 1989.

EurIng Geoffrey Stokes CEng FIEE FCIBSE was Principal Engineer at the National Inspection Council for Electrical Installation Contracting, and is now a consultant. EurIng John T Bradley BSc CEng MIET FCIBSE is Principal Engineer at the Electrical Safety Council.

About the authors xvii


Preface to the Fourth Edition xix


Acknowledgements xxi


Notation xxiii


1 Plan and terminology of BS 7671:2008 and supporting publications 1


1.1 Plan of BS 7671:2008 1


1.2 Terminology of BS 7671:2008 5


1.3 Supporting publications 6


2 Electricity, the law, standards and codes of practice 7


2.1 General 7


2.2 Electricity: the hazards 7


2.3 The law 12


2.4 Standards and codes of practice 13


3 Scope, object and fundamental principles 17


3.1 General 17


3.2 Scope 17


3.3 Object and effects 20


3.4 Fundamental principles 21


4 Assessment of general characteristics 29


4.1 General 29


4.2 Loading, maximum demand and diversity 29


4.3 Arrangement of live conductors and type of earthing 35


4.4 Nature of supply 40


4.5 Supplies for safety services and standby purposes 44


4.6 Installation circuit arrangements 44


4.7 External influences 45


4.8 Compatibility 45


4.9 Maintainability 46


5 Protection against electric shock 47


5.1 General 47


5.2 Provisions for basic protection 51


5.3 Protective measure: automatic disconnection of supply 53


5.4 Protective measure: double or reinforced insulation 75


5.5 Protective measure: electrical separation 77


5.6 Protective measure: extra–low voltage provided by SELV or PELV 78


5.7 Additional protection 81


5.8 Obstacles and placing out of reach 82


5.9 Protective measures for application only where the installation is controlled or under the supervision of skilled or instructed persons 83


6 Protection against thermal effects 89


6.1 General 89


6.2 Fire caused by electrical equipment 91


6.3 Precautions where particular risks of danger of fire exist 95


6.4 Burns 100


7 Protection against overcurrent, undervoltage and overvoltage 101


7.1 General 101


7.2 Nature of protective devices 102


7.3 Protection against overload 104


7.4 Protection against fault current 110


7.5 Determination of prospective fault current 112


7.6 Characteristics of protective devices 128


7.7 Overcurrent protection of conductors in parallel 131


7.8 Coordination of overload and fault current protection 134


7.9 Protection according to the nature of circuits and distribution systems 135


7.10 Protection against undervoltage 136


7.11 Protection against overvoltage 137


8 Isolation and switching 139


8.1 General 139


8.2 Main switch 143


8.3 Isolation 145


8.4 Switching off for mechanical maintenance 151


8.5 Emergency switching and other forms of switching for safety 153


8.6 Emergency stopping 157


8.7 Functional switching 158


8.8 Identification and notices 160


9 Equipment selection: common rules 161


9.1 General 161


9.2 Compliance with standards 161


9.3 Operational conditions, external influences and accessibility 162


9.4 Identification and notices 164


9.5 Mutual detrimental influences 176


9.6 Compatibility 178


9.7 Operation and maintenance manual 179


10 Wiring systems 181


10.1 Wiring systems 181


10.2 External influences 185


10.3 Proximity to other services: general 199


10.4 Methods of installation of cables 205


10.5 Resistances of copper conductors 217


10.6 Electrical connections 218


10.7 Cable supports and cable management systems 224


10.8 Minimizing the risk of fire 230


10.9 Electromagnetic and electromechanical effects 231


10.10 Conduit and trunking cable capacities 233


10.11 Maintainability 238


11 Switchgear, protective devices and other equipment 241


11.1 Switchgear and protective devices: general 241


11.2 Switchgear and controlgear 241


11.3 Selection of devices for overload and fault current protection: general 243


11.4 Overcurrent protective devices 247


11.5 Residual current devices 261


11.6 Identification of overcurrent protective devices 271


11.7 Discrimination 272


11.8 Other equipment 279


12 Protective conductors, earthing and equipotential bonding 289


12.1 Protective conductors 289


12.2 Earthing 307


12.3 Earthing requirements for the installation of equipment having high protective conductor currents 314


12.4 Protective bonding 318


13 Specialized installations 325


13.1 General 325


13.2 Emergency lighting 325


13.3 Fire detection and alarm systems 326


13.4 Petrol filling stations and liquid petroleum gas stations 331


13.5 Installations in dusty environments 331


13.6 Installations in underground and multistorey car parks, etc 332


13.7 Installations in multi–occupancy blocks of flats 332


13.8 Installations in `Section 20 buildings’ 332


13.9 Installations in churches 334


13.10 Installations in thatched properties 334


13.11 Extra–low voltage lighting 335


13.12 Outdoor lighting installations, highway power supplies and street furniture 338


13.13 Security lighting 341


13.14 Welding equipment 342


13.15 Entertainers’ equipment 342


13.16 Generator sets 342


14 Safety services 347


14.1 Safety services: general 347


14.2 Common sources 348


14.3 Parallel and nonparallel sources 350


14.4 Circuit and equipment requirements 351


14.5 Protection against overcurrent and electric shock under fault conditions 351


15 The smaller installation 353


15.1 Scope 353


15.2 The IEE On–Site Guide and the NICEIC Domestic Electrical Installation Guide 353


15.3 User’s requirements 353


15.4 Wiring systems 355


15.5 Electricity distributor’s requirements 355


15.6 Assessment of supply characteristics 355


15.7 `Meter tails’ 356


15.8 System earthing arrangements 357


15.9 Main protective bonding 360


15.10 Minimum cross–sectional area of earthing and main protective bonding conductors 360


15.11 Supplementary bonding 362


15.12 Devices for protection against overcurrent and for fault protection 362


15.13 Devices for isolation and switching 363


15.14 Final circuit design 363


15.15 Remote buildings 384


15.16 Minimum number of socket–outlets in domestic premises 385


15.17 Modifications to existing installations 385


15.18 Inspection, testing, verification and certification of the smaller installation 387


16 Special installations and locations 389


16.1 General 389


16.2 Locations containing a bath or shower 389


16.3 Swimming pools and other basins 398


16.4 Rooms and cabins containing sauna heaters 407


16.5 Construction–site installations 407


16.6 Agricultural and horticultural premises 413


16.7 Conducting locations with restricted movement 421


16.8 Electrical installations in caravan/camping parks and similar locations 422


16.9 Marinas and similar locations 429


16.10 Exhibition shows and stands 430


16.11 Solar photovoltaic power supply systems 435


16.12 Mobile or transportable units 440


16.13 Electrical installations in caravans and motor caravans 445


16.14 Temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circuses 451


16.15 Floor and ceiling heating systems 452


17 Inspection, testing, certification and reporting 459


17.1 Inspection, testing, certification and reporting: general 459


17.2 Test instruments 459


17.3 Safety in electrical testing 462


17.4 Test methods 463


17.5 Initial verification 483


17.6 Periodic inspection and testing 512


17.7 Alterations and additions 534


17.8 Inspection, testing and certification of specialized installations 535


Appendix Standards to which reference has been made 537


Bibliography 545


Index of figures 547


Index of tables 551


Index of regulation numbers 557


Subject index 579

Erscheint lt. Verlag 1.6.2009
Verlagsort Hoboken
Sprache englisch
Maße 168 x 244 mm
Gewicht 666 g
Themenwelt Technik Elektrotechnik / Energietechnik
ISBN-10 0-470-74286-0 / 0470742860
ISBN-13 978-0-470-74286-0 / 9780470742860
Zustand Neuware
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