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Guidance Note 8: Earthing & Bonding 4th edition [Pehme köide]

  • Formaat: Paperback / softback, 212 pages, kõrgus x laius: 297x210 mm
  • Sari: Electrical Regulations
  • Ilmumisaeg: 16-Jan-2019
  • Kirjastus: Institution of Engineering and Technology
  • ISBN-10: 1785614134
  • ISBN-13: 9781785614132
Teised raamatud teemal:
Guidance Note 8: Earthing & Bonding 4th editionSuurem pilt
  • Formaat: Paperback / softback, 212 pages, kõrgus x laius: 297x210 mm
  • Sari: Electrical Regulations
  • Ilmumisaeg: 16-Jan-2019
  • Kirjastus: Institution of Engineering and Technology
  • ISBN-10: 1785614134
  • ISBN-13: 9781785614132
Teised raamatud teemal:
Püsilink: https://www.kriso.ee/db/9781785614132.html
Märksõnad:

Guidance Note 8: Earthing & Bonding includes information from BS 7430 Code of Practice for Earthing. It covers key guidance for all involved with specifying, designing, installing or verifying electrical installations and has been fully updated to BS 7671:2018.

The 18th Edition IET Wiring Regulations publishes in July 2018 and comes into effect on 1st January 2019. All new installations from this point must comply with BS 7671:2018.



Guidance Note 8: Earthing & Bonding includes information from BS 7430 Code of Practice for Earthing. It covers key guidance for all involved with specifying, designing, installing or verifying electrical installations and has been fully updated to BS 7671:2018.

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(24)
2.1 The means of earthing
17(1)
2.2 Distributors `facilities
18(1)
2.3 Earth electrodes
18(1)
2.4 Rod electrodes
19(2)
2.5 Tape and wire electrodes
21(1)
2.6 Plate electrodes
22(1)
2.7 Structural metalwork electrodes
23(1)
2.8 Lead sheaths and other metal coverings of cables for electrodes
24(1)
2.9 Location of the installation earth electrode
24(1)
2.10 Resistance of the earth electrode
25(5)
2.10.1 Calculating the resistance of a rod electrode
28(1)
2.10.2 Calculating the resistance of a plate electrode
29(1)
2.10.3 Calculating the resistance of a tape electrode
29(1)
2.10.4 Limiting values of the electrode resistance for TT systems
30(1)
2.11 Electrode installation
30(2)
2.12 Electrode loading capacity
32(1)
2.13 Earth electrode resistance testing
32(5)
2.14 Determination of the external earth fault loop impedance, Ze
37(1)
2.15 Responsibility for providing a means of earthing
38(3)
Chapter 3 The earthing conductor
41(6)
3.1 The earthing conductor
41(1)
3.2 The cross-sectional area of an earthing conductor
42(2)
3.3 The csa of a buried earthing conductor
44(1)
3.4 Minimum csa of an earthing conductor
45(1)
3.5 Impedance contribution of an earthing conductor
45(1)
3.6 Colour identification of an earthing conductor
45(1)
3.7 Protection of an earthing conductor against external influences
45(1)
3.8 Disconnection of the earthing conductor
46(1)
3.9 Connection of the earthing conductor to the means of earthing
46(1)
Chapter 4 System types and earthing arrangements
47(12)
4.1 A system
47(1)
4.2 TN-C system
48(2)
4.3 TN-S system
50(2)
4.4 TN-C-S system
52(2)
4.5 TT system
54(2)
4.6 IT system
56(3)
Chapter 5 Protective equipotential bonding
59(22)
5.1 The purpose of protective equipotential bonding
59(4)
5.2 Main protective bonding conductors
63(7)
5.2.1 Cross-sectional area
65(2)
5.2.2 Identification
67(1)
5.2.3 Supports
68(1)
5.2.4 Additions and alterations
69(1)
5.3 Earth-free local equipotential bonding
70(2)
5.4 Bonding of lightning protection systems
72(1)
5.5 Extraneous-conductive-parts common to a number of buildings
73(2)
5.6 Installations serving more than one building
75(4)
5.7 Multi-occupancy premises
79(2)
Chapter 6 Extraneous-conductive-parts and their connections
81(8)
6.1 Definition of an extraneous-conductive-part
81(2)
6.2 Some examples of extraneous-conductive-parts
83(1)
6.3 An example of a conductive part which is not an extraneous-conductive-part
84(1)
6.4 Connection to pipework
84(4)
6.5 Connections to structural steelwork and buried steel grids
88(1)
Chapter 7 Automatic disconnection
89(22)
7.1 Automatic disconnection of supply (ADS)
89(1)
7.2 TN systems
89(7)
7.2.1 Earth fault loop impedance
90(5)
7.2.2 Automatic disconnection using an RCD in TN systems
95(1)
7.3 TT systems
96(1)
7.4 IT systems
97(2)
7.5 Additional protection
99(1)
7.6 RCDs in series
99(2)
7.7 Automatic disconnection for reduced low voltage system
101(4)
7.8 Automatic disconnection and alternative supplies
105(1)
7.9 Separated extra-low voltage systems (SELV)
106(1)
7.10 Protective extra-low voltage systems (PELV)
106(1)
7.11 Functional extra-low voltage systems (FELV)
107(1)
7.12 Overvoltages imposed on the low voltage (LV) system due to high voltage (HV) system earth faults
108(3)
Chapter 8 Supplementary protective equipotential bonding
111(22)
8.1 The purpose of supplementary protective equipotential bonding
111(2)
8.2 Supplementary bonding conductor types
113(1)
8.3 Csa of supplementary bonding conductors
114(1)
8.4 Limitations on resistance of supplementary bonding conductors
115(1)
8.5 Supports for supplementary bonding conductors
116(1)
8.6 Locations containing a bath or shower
117(3)
8.7 Shower cabinet located in a bedroom
120(1)
8.8 Swimming pools and other basins
120(4)
8.9 Agricultural and horticultural premises
124(4)
8.10 Conducting locations with restricted movement
128(2)
8.10.1 Medical locations
130(1)
8.11 Temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circuses
130(1)
8.12 Static convenors
130(1)
8.13 Other locations of increased risk
131(1)
8.14 Where automatic disconnection is not feasible
131(2)
Chapter 9 Circuit protective conductors
133(28)
9.1 Circuit protective conductors
133(1)
9.2 Cross-sectional area
134(5)
9.2.1 Calculation of csa - general case
134(2)
9.2.2 Selection of csa - general case
136(1)
9.2.3 Non-copper cpcs
137(1)
9.2.4 Evaluation of k
137(2)
9.3 Armouring
139(3)
9.3.1 Calculation of csa - armoured cable
139(1)
9.3.2 Selection of csa - armoured cable
139(1)
9.3.3 Contribution to earth fault loop impedance
139(1)
9.3.4 Armouring inadequate for a cpc
140(1)
9.3.5 Termination of armoured cables
140(2)
9.4 Steel conduit
142(3)
9.4.1 Calculation of csa - steel conduit
143(1)
9.4.2 Selection of csa - steel conduit
144(1)
9.4.3 Maintaining protective conductor continuity
145(1)
9.5 Steel trunking and ducting
145(1)
9.5.1 Maintaining protective conductor continuity
146(1)
9.6 Other metal enclosures
146(1)
9.7 Terminations in accessories
146(3)
9.8 Cpc for protective and functional purposes
149(1)
9.9 Significant protective conductor currents
150(9)
9.9.1 Equipment
153(1)
9.9.2 Labelling at distribution boards
154(1)
9.9.3 Ring final circuits
154(1)
9.9.4 Radial final circuits
155(1)
9.9.5 Busbar systems
156(1)
9.9.6 Connection of an item of equipment (protective conductor current exceeding 10 mA)
156(2)
9.9.7 TT systems
158(1)
9.9.8 RCDs
158(1)
9.10 Earth monitoring
159(1)
9.11 Proving continuity
160(1)
Chapter 10 Particular issues of earthing and bonding
161(24)
10.1 Clean earths
161(1)
10.2 PME for caravan parks
162(2)
10.3 Exterior semi-concealed gas meters
164(1)
10.4 Small-scale embedded generators
164(4)
10.4.1 Statutory regulations
164(1)
10.4.2 Engineering Recommendation G83
165(1)
10.4.3 Means of isolation
166(1)
10.4.4 Warning notices
167(1)
10.4.5 Up-to-date information
167(1)
10.4.6 Solar Photovoltaic (PV) power supply systems
168(1)
10.5 Mobile and transportable units
168(4)
10.5.1 The term `mobile or transportable unit'
168(1)
10.5.2 Examples of mobile or transportable units
168(1)
10.5.3 The risks
169(1)
10.5.4 Reduction of risks
169(1)
10.5.5 Supplies
170(1)
10.5.6 TN-C-S with PME
170(1)
10.5.7 Protective measures
171(1)
10.5.8 Additional protection
171(1)
10.6 Highway power supplies and street furniture
172(1)
10.6.1 Street furniture
172(1)
10.6.2 Street furniture access doors
172(1)
10.6.3 Earthing of Class I equipment within street furniture
173(1)
10.6.4 Distribution circuits
173(1)
10.7 Suspended ceilings
173(1)
10.8 Exhibitions, shows and stands
174(2)
10.8.1 Protection by ADS
174(1)
10.8.2 Distribution circuits
175(1)
10.8.3 Installations incorporating a generator
175(1)
10.8.4 Final circuits
176(1)
10.9 Medical locations
176(3)
10.9.1 Type of system earthing
176(1)
10.9.2 SELV and PELV
176(1)
10.9.3 Fault protection
176(1)
10.9.4 TT systems
177(1)
10.9.5 Medical IT systems
177(1)
10.9.6 Transformers for a medical IT system
177(1)
10.9.7 Supplementary protective equipotential bonding
178(1)
10.10 Marinas and similar locations
179(2)
10.10.1 The risks
179(1)
10.10.2 Minimizing the risks
180(1)
10.10.3 Protection against electric shock
180(1)
10.10.4 TN system
180(1)
10.11 Cable tray and cable basket
181(2)
10.12 EMC earthing and bonding
183(1)
10.13 Electric vehicle charging installations
183(2)
Appendix A Values of k for various forms of protective conductor 185(2)
Appendix B Data for armoured cables 187(4)
Index 191