17th Edition

The 17th edition, released in January 2008, is the latest edition of BS7671, and became effective for all installations designed after 1 July 2008. One of the more significant changes is (chapter 41) that 30 mA RCD’s will be required for socket outlets that are for use by ordinary persons and are intended for general use. This improves the level of protection against electrical shock in the UK to a level comparable to that in other EU countries. The 17th edition incorporates new sections relating to microgeneration and solar photovoltaic systems.

The 18th Edition (BS 7671:201) can be used to design electrical installations from 1st July 2018 however it does not actually come into effect until 1st January 2019.  Installations designed after 31st December 2018 must comply with the 18th Edition Wiring Regulations.

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