What are the changes to the colours of fixed wiring?
The changes to the colour identification of conductors in fixed wiring are introduced,
amongst other things, by Amendment No 2 to BS 7671 which was published on
31 March 2004. The new colours are the harmonized colours. The changes were
effective from that day and from 1 April 2006 are a requirement. It is not permitted to
wire a new installation using a mixture of the old and the new colours.
The Regulations cited in the following explanation are taken from Amendment no 2 of
BS 7671.
http://www.esc.org.uk/pdfs/business-and-community/electrical-industry/cable-colours.pdf