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Guidance Note 8: Earthing & Bonding 3rd edition [Pehme köide]

  • Formaat: Paperback / softback, 192 pages, kõrgus x laius: 297x210 mm
  • Sari: Electrical Regulations
  • Ilmumisaeg: 02-Apr-2015
  • Kirjastus: Institution of Engineering and Technology
  • ISBN-10: 1849198837
  • ISBN-13: 9781849198837
Teised raamatud teemal:
Guidance Note 8: Earthing & Bonding 3rd editionSuurem pilt
  • Formaat: Paperback / softback, 192 pages, kõrgus x laius: 297x210 mm
  • Sari: Electrical Regulations
  • Ilmumisaeg: 02-Apr-2015
  • Kirjastus: Institution of Engineering and Technology
  • ISBN-10: 1849198837
  • ISBN-13: 9781849198837
Teised raamatud teemal:
Püsilink: https://www.kriso.ee/db/9781849198837.html
Guidance Note 8: Earthing & Bonding provides a comprehensive guide to this subject and has been updated to reflect the changes made in Amendment 3.



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 8(1)
Acknowledgements 9(1)
Preface 10(1)
Introduction 11(2)
Chapter 1 Protective earthing
13(4)
1.1 Protective earthing
13(1)
1.2 Source earthing
13(1)
1.3 The purpose of source earthing
14(1)
1.4 The purpose of electrical equipment earthing
14(3)
Chapter 2 The means of earthing
17(20)
2.1 The means of earthing
17(1)
2.2 Distributors' facilities
17(1)
2.3 Earth electrodes
18(1)
2.4 Rod electrodes
18(2)
2.5 Tape and wire electrodes
20(1)
2.6 Plate electrodes
20(1)
2.7 Structural metalwork electrodes
21(1)
2.8 Metal covering of cables for electrodes
22(1)
2.9 Location of the installation earth electrode
23(1)
2.10 Resistance of the earth electrode
23(4)
2.10.1 Calculating the resistance of a rod electrode
25(1)
2.10.2 Calculating the resistance of a plate electrode
26(1)
2.10.3 Calculating the resistance of a tape electrode
26(1)
2.10.4 Limiting values of the electrode resistance for TT systems
26(1)
2.11 Electrode installation
27(1)
2.12 Electrode loading capacity
28(1)
2.13 Earth electrode resistance testing
28(5)
2.14 Determination of the external earth fault loop impedance, Ze
33(1)
2.15 Responsibility for providing a means of earthing
34(3)
Chapter 3 The earthing conductor
37(6)
3.1 The earthing conductor
37(1)
3.2 The cross-sectional area of an earthing conductor
38(2)
3.3 The csa of a buried earthing conductor
40(1)
3.4 Minimum csa of an earthing conductor
40(1)
3.5 Impedance contribution of an earthing conductor
40(1)
3.6 Colour identification of an earthing conductor
40(1)
3.7 Protection of an earthing conductor against external influences
41(1)
3.8 Disconnection of the earthing conductor
41(1)
3.9 Connection of the earthing conductor to the means of earthing
41(2)
Chapter 4 System types and earthing arrangements
43(10)
4.1 A system
43(1)
4.2 TN-C system
44(2)
4.3 TN-S system
46(1)
4.4 TN-C-S system
47(2)
4.5 TT system
49(2)
4.6 IT system
51(2)
Chapter 5 Protective equipotential bonding
53(20)
5.1 The purpose of protective equipotential bonding
53(3)
5.2 Main protective bonding conductors
56(7)
5.2.1 Cross-sectional area
58(2)
5.2.2 Identification
60(1)
5.2.3 Supports
61(1)
5.2.4 Additions and alterations
62(1)
5.3 Earth-free local equipotential bonding
63(1)
5.4 Bonding of lightning protection systems
64(1)
5.5 Extraneous-conductive-parts common to a number of buildings
65(2)
5.6 Installations serving more than one building
67(4)
5.7 Multi-occupancy premises
71(2)
Chapter 6 Extraneous-conductive-parts and their connections
73(8)
6.1 Definition of an extraneous-conductive-part
73(2)
6.2 Some examples of extraneous-conductive-parts
75(1)
6.3 An example of a conductive part which is not an extraneous-conductive-part
76(1)
6.4 Connection to pipework
76(3)
6.5 Connections to structural steelwork and buried steel grids
79(2)
Chapter 7 Automatic disconnection
81(18)
7.1 Automatic disconnection of supply (ADS)
81(1)
7.2 TN systems
81(6)
7.2.1 Earth fault loop impedance
82(5)
7.2.2 Automatic disconnection using an RCD in TN systems
87(1)
7.3 TT systems
87(1)
7.4 IT systems
88(2)
7.5 Additional protection
90(1)
7.6 RCDs in series
90(1)
7.7 Automatic disconnection for reduced low voltage system
91(3)
7.8 Automatic disconnection and alternative supplies
94(1)
7.9 Separated extra-low voltage systems (SELV)
95(1)
7.10 Protective extra-low voltage systems (PELV)
95(1)
7.11 Functional extra-low voltage systems (FELV)
96(1)
7.12 Overvoltages imposed on the LV system due to HV system earth faults
97(2)
Chapter 8 Supplementary equipotential bonding
99(20)
8.1 The purpose of supplementary equipotential bonding
99(1)
8.2 Supplementary bonding conductor types
100(1)
8.3 Csa of supplementary bonding conductors
101(1)
8.4 Limitations on resistance of supplementary bonding conductors
102(1)
8.5 Supports for supplementary bonding conductors
103(1)
8.6 Bath and shower rooms
104(3)
8.7 Shower cabinet located in a bedroom
107(1)
8.8 Swimming pools and other basins
107(3)
8.9 Agricultural and horticultural premises
110(3)
8.10 Conducting locations with restricted movement
113(3)
8.10.1 Medical locations
115(1)
8.11 Temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circuses
116(1)
8.12 Static convertors
116(1)
8.13 Other locations of increased risk
116(1)
8.14 Where automatic disconnection is not achievable
117(2)
Chapter 9 Circuit protective conductors
119(26)
9.1 Circuit protective conductors
119(1)
9.2 Cross-sectional area
120(4)
9.2.1 Calculation of csa -- general case
120(2)
9.2.2 Selection of csa -- general case
122(1)
9.2.3 Non-copper CPCs
122(1)
9.2.4 Evaluation of k
123(1)
9.3 Armouring
124(3)
9.3.1 Calculation of csa -- armoured cable
124(1)
9.3.2 Selection of csa -- armoured cable
125(1)
9.3.3 Contribution to earth fault loop impedance
125(1)
9.3.4 Armouring inadequate for a CPC
125(1)
9.3.5 Termination of armoured cables
125(2)
9.4 Steel conduit
127(3)
9.4.1 Calculation of csa -- steel conduit
128(1)
9.4.2 Selection of csa -- steel conduit
129(1)
9.4.3 Maintaining protective conductor continuity
129(1)
9.5 Steel trunking and ducting
130(1)
9.5.1 Maintaining protective conductor continuity
130(1)
9.6 Other metal enclosures
130(1)
9.7 Terminations in accessories
131(2)
9.8 CPC for protective and functional purposes
133(1)
9.9 Significant protective conductor currents
134(8)
9.9.1 Equipment
137(1)
9.9.2 Labelling at distribution boards
137(1)
9.9.3 Ring final circuits
138(1)
9.9.4 Radial final circuits
138(1)
9.9.5 Busbar systems
139(1)
9.9.6 Connection of an item of equipment (protective conductor current exceeding 10 mA)
140(1)
9.9.7 TT systems
141(1)
9.9.8 RCDs
141(1)
9.10 Earth monitoring
142(1)
9.11 Proving continuity
143(2)
Chapter 10 Particular issues of earthing and bonding
145(22)
10.1 Clean earths
145(1)
10.2 PME for caravan parks
146(1)
10.3 Exterior semi-concealed gas meters
147(1)
10.4 Small-scale embedded generators
148(4)
10.4.1 Statutory regulations
148(1)
10.4.2 Engineering Recommendation G83
149(1)
10.4.3 Means of isolation
150(1)
10.4.4 Warning notices
150(1)
10.4.5 Up-to-date information
151(1)
10.4.6 Guidance Note 7: Special Locations
151(1)
10.5 Mobile and transportable units
152(2)
10.5.1 The term `mobile or transportable unit'
152(1)
10.5.2 Examples of mobile or transportable units
152(1)
10.5.3 The risks
152(1)
10.5.4 Reduction of risks
153(1)
10.5.5 Supplies
153(1)
10.5.6 TN-C-S with PME
153(1)
10.5.7 Protective measures
154(1)
10.5.8 Additional protection
154(1)
10.6 Highway power supplies and street furniture
154(3)
10.6.1 Street furniture and street located equipment
155(1)
10.6.2 Street furniture access doors
155(1)
10.6.3 Earthing of street furniture access doors
156(1)
10.6.4 Earthing of Class I equipment within street furniture
156(1)
10.6.5 Distribution circuits
156(1)
10.6.6 Temporary supplies
156(1)
10.7 Suspended ceilings
157(1)
10.8 Exhibitions, shows and stands
158(1)
10.8.1 Protection by ADS
158(1)
10.8.2 Distribution circuits
158(1)
10.8.3 Installations incorporating a generator
158(1)
10.8.4 Final circuits
159(1)
10.9 Medical locations
159(3)
10.9.1 Type of system earthing
159(1)
10.9.2 SELV and PELV
159(1)
10.9.3 Fault protection
160(1)
10.9.4 TT systems
160(1)
10.9.5 Medical IT systems
160(1)
10.9.6 Transformers for a medical IT system
161(1)
10.9.7 Supplementary equipotential bonding
162(1)
10.10 Marinas
162(2)
10.10.1 The risks
163(1)
10.10.2 Minimising the risks
163(1)
10.10.3 Protection against electric shock
163(1)
10.10.4 TN system
163(1)
10.11 Cable tray and cable basket
164(2)
10.12 EMC earthing and bonding
166(1)
10.13 Electric vehicle charging installations
166(1)
Appendix A Values of K for various forms of protective conductor 167(2)
Appendix B Data for armoured cables 169(4)
Index 173