Amendment 3 BS 7671 Requirements for Electrical Installations IET Wiring Regulations
The British Standards Institution (BSI) publishes standards and provides a range of books, self-assessment tools, conferences and training services. It also represents UK economic and social interests in European and international standards organisations.
BS 7671 Requirements for Electrical Installations. IET Wiring Regulations, sets the standards for electrical installations in the UK. It is published by BSI and the Institution of Engineering and Technology (IET).
On January 1 2015, BS 7671:2008+A3:2015, Amendment No. 3 to the 17th Edition was published. It included changes relating to:
- Consumer units.
- Wiring in escape routes.
- Changes to earth fault loop impedances for all protective devices.
- Updated EIC and EICR forms.
- Changes to definitions.
Amendment 3 came into effect on 1 July 2015, however, the changes in relation to consumer units did not come into effect until 1 January 2016.
From this point, consumer units and similar switchgear assemblies have to comply with BS EN 61439-3 Low-voltage switchgear and controlgear assemblies. Distribution boards intended to be operated by ordinary persons (DBO).
The amendment in relation to consumer units has been made in response to the increase in the number of fires which are thought to have involved consumer units with thermoplastic enclosures in which arcing on cables due to poor electrical connections caused overheating.
The amendment requires that consumer units contain fires, either being constructed using a non-combustible material or being contained within a cabinet constructed using a non-combustible material. It applies to consumer units and similar switchgear assemblies inside domestic premises. It does not apply to non-domestic installations or to outside installations.
 Related articles on Desgining Buildings Wiki
Featured articles and news
Find out about the different types of delays on construction projects.
Researchers at Wien university have developed new system to create an inflatable concrete structure.
ICE responds to the first consultation on the government's industrial strategy post-Brexit.
Take a look at this newly-opened tower in Chicago with a remarkable 20:1 height-to-base ratio.
An Arc de Triomphe for the late-20th century, the La Grande Arche of Paris.
Richard Hayward of Legrand asks whether technology could help developers meet the needs of an increasingly diverse population.
Thomas Heatherwick's ambitious steel structure begins construction.
The principles, practice and formwork of one of the most important components of modern architecture.
New report claims that inappropriate standards and regulations are holding back the use of composites.
The global smart homes and smart light commercial market will grow fastest in the UK.
Futurist Thomas Frey explores the concept of Disposable Housing - could it be a reality sooner than we imagine?