BS-7671-2008-CORR.1-2008.pdf
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1、 This corrigendum contains corrections to BS 7671:2008. For clarification, where appropriate, deleted text has been ruled through and additional text has been underlined. Sufficient of the existing text has been included to enable users to identify the nature and extent of the change. Amend Table 41
2、.1, NOTE 2 and 411.4.5, NOTE by deleting “(typically 2In)”. Amend 434.2.1 as follows: 434.2.1 The regulations in Regulation 434.2 shall not be applied to installations situated in locations presenting a fire risk or risk of explosion and or where the requirements for special installations and locati
3、ons specify different conditions. Amend 515.3.1 and 515.3.2 by replacing references to “BS EN 50082” and “BS EN 50081” with “BS EN 61000 series”. Amend 533.3 as follows: 533.3 Selection of devices for protection of wiring systems against fault current The application of the regulations of Chapter 43
4、 for fault currents of duration up to 5 s shall take into account maximum fault current conditions. Where the device provides protection against fault current only, account shall be taken of minimum short-circuit fault current conditions. Where the standard covering a protective device specifies bot
5、h a rated service short-circuit breaking capacity and a rated ultimate short-circuit breaking capacity, it is acceptable to select the protective device on the basis of the ultimate fault current short-circuit breaking capacity for the maximum short-circuit fault current conditions. Operational circ
6、umstances may, however, make it desirable to select the protective device on the service short- circuit breaking capacity, e.g. where a protective device is placed at the origin of the installation. Where the short-circuit breaking capacity of the protective device is lower than the maximum prospect
7、ive short- circuit or earth fault current that is expected at its point of installation, it is necessary to comply with the requirements of the last paragraph of Regulation 536.1 and Regulation 536.5. Amend Table 53.2 as follows: Device Standard Isolation(5) Emergency Switching(2) Functional switchi
8、ng (5) In an installation forming part of a TT or IT system, isolation requires disconnection of all the live conductors. See Regulation 537.2.2.1. Replace 537.1.2 as follows: 537.1.2 Combined protective and neutral (PEN) conductors shall not be isolated or switched except as permitted by Regulation
9、 543.3.4. Except as required by Regulation 537.1.4, in a TN-S or TN-C-S system the neutral conductor need not be isolated or switched where it can be regarded as being reliably connected to Earth by a suitably low impedance. For supplies which are provided in accordance with the Electricity Safety,
10、Quality and Continuity Regulations 2002, the supply neutral conductor (PEN or N) is considered to be connected to Earth by a suitably low impedance. Corrigendum (July 2008) BRITISH STANDARD BS 7671:2008 Requirements for Electrical Installations IEE Wiring Regulations, Seventeenth Edition The Institu
11、tion of Engineering and Technology and BSI NO FURTHER ELECTRONIC COPYING WITHOUT WRITTEN PERMISSION Amend 702.411 as follows: 702.411415 Protective measure: Automatic disconnection of supply Additional protection Amend Regulation number 702.411.3.3 to 702.415.2 Note the changing of the above two Reg
12、ulation numbers effectively moves that group from page 171 to 172. Amend 702.55.1(ii) and (iii) by replacing “702.411.3.3” with “702.415.2”. Amend 705.1, NOTE by deleting “and BS EN 6100-1” Amend Figure 705, bottom left-hand corner, by replacing “150 mm ? 150 mm” with “150 mm x 150 mm” Appendix 1, B
13、ritish Standards to which reference is made in the Regulations Amend as follows: BS 6220:1983 (1999) Electric cables. Single core PVC insulated flexible cables of rated voltage 600/1000 V for switchgear and controlgear wiring Deleted by BS 7671:2008, Corrigendum (July 2008) Appx 15 BS EN 61000 Elect
14、romagnetic compatibility (EMC) BS EN 61000 is a multiple part standard 515.3.1 515.3.2 Appx 5 AM Appx 11 para 1 BS EN 6100-1 Glossary of building and civil engineering terms Deleted by BS 7671:2008, Corrigendum (July 2008) 705.1 note Appendix 9, Definitions multiple source, d.c. and other systems Am
15、end Figures 9D to 9M as follows: Change symbol: to: . Appendix 15, Ring and radial final circuit arrangements, Regulation 433.1 Amend Figures 1 and 2 as shown over page: Index Amend as shown: Page 364 - swimming pools- - supplementary equipotential bonding 702.411.3.3(ii) 415.2 Page 366 - swimming p
16、ools 702.411.3.3 415.2 Page 372 - swimming pools 702.411.3.3 415.2 Page 373 - swimming pools 702.411 415.2 - swimming pools 702.411.3.3 415.2 Page 379 - starting currents 522.1.1 552.1.1 Page 382 - swimming pools 702.411.3.3 415.2 Page 386 - swimming pools 702.411.3.3 415.2 - supplementary equipoten
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