Internationally there is steady progress towards alignment of the electrical wiring standards for low voltage installations. This is reflected in the IEC standard 60364, the European Harmonisation Document HD 60364 and the UK "IET Wiring Regulations" 17th edition, now also known as British Standard BS7671:2008+A1:2011, all of which share a common format.

This manual gives the reader up to date information on the current edition of BS7671:2008+A1:2011, requirements for electrical installations, in depth coverage of all aspects of the regulations and their application with many practical examples and sample design calculations. The manual also provides a summary of some of the basic principles necessary for a good understanding of electrical installation technology. Note: This manual is NOT the standard itself, it is a guide to the implementation of the standard.