A practical guide to the wiring regulations: 17th edition by Geoffrey Stokes, John Bradley

By Geoffrey Stokes, John Bradley

This best-selling textual content has been revised to mirror the necessities of the 17th variation of the IEEWiring rules (BS 7671: 2008).

It comprises crucial details at the new principles utilized to important installations or destinations, akin to bogs, swimming pool destinations, camping/caravan websites, marinas, exhibition and convey destinations, sun photovoltaic strength provide platforms, and ground and ceiling heating platforms, among others. It provides transparent reasons on inspection, checking out, certification and reporting, try tools and try tools, in addition to protecting:

  • electricity, the legislation, criteria and codes of perform;
  • assessment of common features;
  • protection opposed to electrical surprise, thermal results, overcurrent, undervoltage and overvoltage;
  • isolation and switching;
  • the universal ideas of apparatus choice;
  • switchgear, protecting units and different gear;
  • wiring structures (including the exterior impacts on them and cable deploy methods);
  • protective conductors, earthing and protecting bonding;
  • supplies for security prone;
  • the smaller set up, and;
  • specialised installations, reminiscent of outdoors lights, installations in church buildings, multi-occupancy blocks of apartments.

those themes are addressed with pertinent law numbers, and an invaluable appendix lists the correct criteria. heritage advice and labored examples are supplied the place applicable.

just like the previous variants of this article, this new version could be an invaluable relief for designers, installers and verifiers of electric installations, scholars of the wishing to realize greater figuring out of the numerous points of electric safeguard, and ‘duty holders’ as outlined by way of the electrical energy at paintings laws 1989.

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G. 1), although numbers with up to five decimal points are used in Part 7. 3 – RCDs in a TN system. 1 – Fuses. 1 illustrates how the numbers are formulated and this applies to all parts except Part 7. In Part 7, sections take the place of chapters, and in the regulation numbers, the number appearing after the section number generally refers to the corresponding chapter, section or regulation in Parts 1–6. BS 7671 is less a design code of practice than a standard for safe practice and is more of a framework document like the emergent CENELEC Harmonized Documents.

1 General It is not the intention here to examine in detail all the statutory requirements relating to the hazards of electricity, but merely to draw to the reader’s attention that such requirements do exist. The regulations made under the various acts should, therefore, be consulted to enable those involved with electricity to meet their statutory obligations. 1 summarizes some of the statutory documents relating to electrical installations and serves only as a quick reference. A rigorous commentary and analysis of the implications of these statutory regulations is given in Electrical Safety and the Law by Ken Oldham Smith (see Bibliography) and published by Blackwell Science.

It is important to note that this ‘dispensation’ of sanctioning a departure is not afforded to anyone other than the designer, who must accept responsibility for such noncompliance. 2 New materials and inventions From time to time, new ideas for equipment are brought to the industry which, naturally, have not been tried and tested over time in service conditions. It is not the intention of BS 7671 to suppress such innovations and their introduction into electrical installations, and this fact is acknowledged in BS 7671.

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