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Guidance Note 1: Selection & Erection 7th edition [Pehme köide]

  • Formaat: Paperback / softback, 228 pages, kõrgus x laius: 297x210 mm
  • Sari: Electrical Regulations
  • Ilmumisaeg: 16-Jan-2015
  • Kirjastus: Institution of Engineering and Technology
  • ISBN-10: 1849198691
  • ISBN-13: 9781849198691
Teised raamatud teemal:
Guidance Note 1: Selection & Erection 7th editionSuurem pilt
  • Formaat: Paperback / softback, 228 pages, kõrgus x laius: 297x210 mm
  • Sari: Electrical Regulations
  • Ilmumisaeg: 16-Jan-2015
  • Kirjastus: Institution of Engineering and Technology
  • ISBN-10: 1849198691
  • ISBN-13: 9781849198691
Teised raamatud teemal:
Püsilink: https://www.kriso.ee/db/9781849198691.html
Guidance Note 1: Selection & Erection contains clear guidance on how to apply the relevant sections of BS 7671. A fundamental guide for specifiers, installers and those testing installations, the expected updates in Amendment 3 greatly impact on day-to-day tasks.



The main changes to BS 7671 that impact Guidance Note 1 include information on:







consumer units (to come into effect January 2016); wiring in escape routes; changes to earth fault loop impedances for all protective devices; changes to definitions throughout the Regulations.



Please note, sections previously in Guidance Note 1 on Outdoor Lighting and ELV Lighting can now be found in Guidance Note 7 (5th Edition).



Amendment 3 published on 5 January 2015 and comes into effect on 1 July 2015. All new installations from this point must comply with Amendment 3 to BS 7671:2008.
Cooperating organisations 9(1)
Acknowledgements 10(1)
Preface 11(2)
Introduction 13(2)
Chapter 1 General requirements
15(6)
1.1 General
15(1)
1.2 Equipment
15(1)
1.3 The Electricity at Work Regulations 1989
15(1)
1.4 The Construction (Design and Management) Regulations 2007
16(1)
1.5 Building Regulations
17(1)
1.5.1 The Building Regulations 2000 (England and Wales)
17(1)
1.5.2 The Building (Scotland) Regulations 2004
18(1)
1.6 Competence
18(3)
Chapter 2 Selection and erection of equipment
21(14)
2.1 General
21(1)
2.2 Compliance with standards
21(1)
2.2.1 European norms (ENs)
21(1)
2.2.2 Harmonization documents (HDs)
21(1)
2.3 Operational conditions and external influences
22(1)
2.3.1 Motors
23(1)
2.3.2 Electromagnetic compatibility (EMC)
23(1)
2.3.3 Harmonics
23(1)
2.4 Identification and notices
23(5)
2.4.1 Cables and conductors
23(2)
2.4.2 Circuits
25(1)
2.4.3 Switchgear
25(1)
2.4.4 Warning notices
25(1)
2.4.5 Other notices
26(1)
2.4.6 Safety signs
26(1)
2.4.7 Notices and identification labels
26(2)
2.5 Mutual detrimental influence
28(1)
2.6 Compatibility
28(1)
2.7 Functional earthing
29(1)
2.8 Low voltage (LV) switchgear and controlgear assemblies
30(5)
2.8.1 Forms of separation
30(2)
2.8.2 General
32(3)
Chapter 3 Protection against overcurrent, electric shock and overvoltage
35(30)
3.1 Protection against electric shock - overview
35(1)
3.1.1 Automatic disconnection of supply
35(1)
3.1.2 Basic protection
36(1)
3.1.3 Fault protection
36(1)
3.1.4 Additional protection
36(1)
3.2 Protective devices
36(1)
3.3 Overcurrent protective devices
36(2)
3.3.1 Motor circuits
38(1)
3.4 Fuses
38(2)
3.5 Circuit-breakers
40(2)
3.5.1 Circuit-breakers for applications not exceeding 440 V a.c.
40(1)
3.5.2 Circuit-breakers for applications not exceeding 1000 V a.c. (MCCBs)
41(1)
3.5.3 Circuit-breakers -- general
41(1)
3.6 Insulation monitoring devices (IMDs)
42(1)
3.7 Residual current devices (RCDs)
43(8)
3.7.1 Terminology
43(2)
3.7.2 A wide choice of device
45(1)
3.7.3 Discrimination (selectivity)
46(2)
3.7.4 Additional protection
48(1)
3.7.5 Location of RCDs
48(1)
3.7.6 Selection of types of RCD
48(1)
3.7.7 TT systems
49(1)
3.7.8 Two distinct categories
49(1)
3.7.9 Limitations and precautions
50(1)
3.7.10 Unwanted tripping
50(1)
3.8 Automatic disconnection of supply
51(6)
3.8.1 Types of protective conductor
53(1)
3.8.2 Protective bonding
53(1)
3.8.3 Sizing of earthing conductor and main protective bonding conductors
54(2)
3.8.4 Earthing of flush metal accessory boxes
56(1)
3.9 Protection against voltage disturbances
57(8)
3.9.1 Disturbances due to earth faults in the high voltage system and due to faults in the low voltage system
57(1)
3.9.2 Protection against overvoltages of atmospheric origin or due to switching
58(1)
3.9.3 Equipment impulse withstand voltage
58(1)
3.9.4 AQ criteria and risk assessment
59(1)
3.9.5 Switching overvoltages
60(1)
3.9.6 Surge protective devices (SPDs)
60(5)
Chapter 4 External influences
65(10)
4.1 General
65(1)
4.2 Ambient temperature (AA)
65(1)
4.3 Solar radiation (AN) and ultraviolet radiation
66(1)
4.4 The IP and IK codes
67(1)
4.5 Presence of water (AD) or high humidity (AB)
67(1)
4.6 Presence of solid foreign bodies (AE)
68(1)
4.7 Presence of corrosive or polluting substances (AF)
68(1)
4.8 Impact (AG), vibration (AH) and other mechanical stresses (AJ)
69(1)
4.9 Presence of fauna (AL), flora and/or mould growth (AK)
70(1)
4.10 Potentially explosive atmospheres
71(1)
4.11 Precautions where particular risks of fire exist
71(4)
4.11.1 Locations with risks of fire due to the nature of processed or stored materials
71(2)
4.11.2 Locations constructed of combustible materials
73(1)
4.11.3 Fire propagating structures
73(1)
4.11.4 Locations of national, commercial, industrial or public significance
73(2)
Chapter 5 Installation of cables
75(14)
5.1 Cable selection
75(3)
5.1.1 Conduit, trunking and ducting systems standards
76(2)
5.2 Cables concealed in structures
78(3)
5.2.1 Walls and partitions
78(3)
5.3 Cable routes and livestock
81(1)
5.4 Capacities of conduit and trunking
81(1)
5.5 Selection of cables and wiring systems with low emission of smoke and corrosive gases when affected by fire
81(1)
5.6 'Section 20'
82(1)
5.7 Buried cables
83(3)
5.8 Sealing and fire stopping
86(3)
Chapter 6 Sizing of cables
89(4)
6.1 Current-carrying capacity and voltage drop
89(1)
6.2 Diversity
89(1)
6.3 Neutral conductors
90(1)
6.4 Voltage drop in consumers' installations
91(2)
Chapter 7 Other influences
93(20)
7.1 Electrical connections
93(1)
7.2 Cables in contact with thermal insulation
94(2)
7.3 Mutual or individual deterioration
96(1)
7.4 Proximity of wiring systems to other services
97(1)
7.5 Plasticiser migration from PVC insulation
98(1)
7.6 Section 444 Measures against electromagnetic disturbances
99(1)
7.6.1 Introduction to electromagnetic compatibility (EMC)
99(1)
7.6.2 EMC legislation
99(1)
76.3 Scope of BS 7671 Section 444
100(7)
7.6.4 Section 444 and general EMC advice
100(7)
7.6.5 Recommended further reading
107(1)
7.7 Auxiliary circuits
107(6)
7.7.1 Introduction
107(1)
7.7.2 Content of Section 557
108(2)
7.7.3 Power supplies and configuration
110(1)
7.7.4 Current transformers and voltage transformers
111(1)
7.7.5 Connection to the main circuit
111(2)
Chapter 8 Installation of equipment
113(16)
8.1 Earthing requirements for the installation of equipment having high protective conductor currents
113(6)
8.1.1 Scope
113(1)
8.1.2 The risks
114(1)
8.1.3 Equipment
115(1)
8.1.4 Labelling
115(1)
8.1.5 Ring circuits
115(2)
8.1.6 Radial circuits
117(1)
8.1.7 Busbar systems
118(1)
8.1.8 RCDs and high protective conductor currents
118(1)
8.2 Water heating
119(1)
8.3 Safety services
119(1)
8.4 Other equipment
120(1)
8.5 Luminaires
121(2)
8.5.1 Scope
121(1)
8.5.2 General
121(1)
8.5.3 Protection against fire
121(1)
8.5.4 Transformers, convertors and controlgear
122(1)
8.5.5 Independent lamp controlgear
122(1)
8.5.6 Stroboscopic effect
123(1)
8.6 Highway power supplies, street furniture and external lighting installations
123(2)
8.6.1 Protection against electric shock
123(1)
8.6.2 Equipment doors
123(1)
8.6.3 Devices for isolation and switching
123(1)
8.6.4 Protection and identification of cables
124(1)
8.6.5 External influences
124(1)
8.6.6 Bus shelters, etc. and decorative lighting
124(1)
8.6.7 References
125(1)
8.7 Extra-low voltage lighting installations
125(2)
8.7.1 Protection against overcurrent
125(1)
8.7.2 Isolation and switching
125(1)
8.7.3 Protection against fire
126(1)
8.7.4 Nature of processed or stored materials
126(1)
8.7.5 Fire risk of transformers and convertors
126(1)
8.7.6 Fire risk from short-circuiting of uninsulated conductors
126(1)
8.7.7 Bare conductors
127(1)
8.7.8 Suspended systems
127(1)
8.7.9 Cross-sectional area of conductors
127(1)
8.8 Selection and erection in relation to operation and maintainability
127(2)
Appendix A Cable capacities of conduit and trunking
129(8)
A1 General
129(1)
A2 Single-core thermoplastic (PVC) insulated cables in straight runs of conduit not exceeding 3 M in length
130(1)
A3 Single-core thermoplastic (PVC) insulated cables in straight runs of conduit exceeding 3 M in length, or in runs of any length incorporating bends or sets
131(2)
A4 Single-core thermoplastic (PVC) insulated cables in trunking
133(1)
A5 Other sizes and types of cable in conduit or trunking, including flexible conduit
134(1)
A6 Background to the tables
135(2)
Appendix B Degrees of protection provided by enclosures
137(6)
B1 IP code for ingress protection
137(4)
B1.1 General
137(2)
B1.2 Additional letter
139(1)
B1.3 Supplementary letter
139(1)
B1.4 Product marking
140(1)
B1.5 Drip-proof and splashproof
140(1)
B2 IK code for impact protection
141(2)
B2.1 General
141(2)
Appendix C Standard circuit arrangements and the provision of socket-outlets
143(10)
C1 General
143(1)
C2 Final circuits using socket-outlets and fused connection units complying with BS 1363
143(3)
C2.1 Layout
143(2)
C2.2 Circuit protection
145(1)
C2.3 Conductor size
145(1)
C3.4 Spurs
145(1)
C2.5 Permanently connected equipment
146(1)
C3 Radial final circuits using 16 A socket-outlets complying with BS EN 60309-2 (BS 4343)
146(1)
C3.1 General
146(1)
C3.2 Circuit protection
146(1)
C3.3 Conductor size
146(1)
C3.4 Types of socket-outlet
146(1)
C4 Cooker final circuits in household premises
146(1)
C5 Water heating and electric shower final circuits in household premises
147(1)
C6 Provision of socket-outlets
147(2)
C6.1 Number of socket-outlets
147(2)
C6.2 Sinks and electrical accessories
149(1)
C7 Mounting heights of accessories
149(4)
C7.1 BS 8300: 2009+Al: 2010 Design of buildings and their approaches to meet the needs of disabled people -- Code of practice
150(3)
Appendix D Limitation of earth fault loop impedance for compliance with Regulation 543.1.1
153(16)
D1 Selection of a circuit protective conductor
159(1)
D2 Steel conduit and trunking
159(1)
D3 Steel-wire armoured cables
160(5)
D4 Mineral insulated cable with copper sheath
165(2)
D5 Thermoplastic (PVC) insulated and sheathed cables to BS 6004
167(2)
Appendix E Resistance and impedance of copper and aluminium conductors under fault conditions
169(8)
E1 Verification
172(1)
E2 Mineral insulated cable with copper sheath
172(3)
E3 Steel-wire armour, steel conduit and steel trunking
175(2)
Appendix F Selection and erection of wiring systems
177(8)
F1 General
177(7)
F2 British Standards
184(1)
F3 Fire stopping
184(1)
Appendix G Notes on methods of support for cables, conductors and wiring systems
185(8)
G1 Cables generally
185(1)
G2 Particular applications
186(1)
G3 Overhead wiring
186(4)
G4 Conduit and cable trunking
190(1)
G5 Conduit bends
191(1)
G6 Spacing of supports for busbar trunking systems
191(2)
Appendix H Maximum demand and diversity
193(4)
Appendix I Permitted protective conductor currents
197(2)
Appendix J Standard symbols, units and graphical symbols for general electrical purposes
199(6)
J1 General symbols
199(3)
J1.1 SI derived units
201(1)
J2 Symbols for use in schematic wiring diagrams
202(1)
J2.1 Making and breaking current
203(1)
J2.2 Isolating
203(1)
J2.3 Making, breaking and isolating
203(1)
J2.4 Meters
203(1)
J3 Location symbols for installations
203(2)
Appendix K Adresses of associated bodies and industry contacts
205(6)
Index 211