Australia also have a different wiring colour standard.
Old 4 core cable colours.
Where an addition or alteration is made to a two or three phase installation wired in the old core colours with cable to the new core colours unambiguous identification is required at the interface.
Red red white white.
Pre march 2004 the uk standard for 2 core and earth cable used in single phase i e.
Other core colours are allowed except green and yellow.
Red red white.
Brown orange and yellow are used for 480 vac.
Before this change old wiring colours in the uk for 2 core wire were red live black neutral and earths are either bare or yellow and green whereas with 3 core cable live red blue neutral additional yellow and earth either bare or yellow and green.
2 core and earth cable.
Neutral conductors old and new conductors.
Two core and earth cable new colours two core and earth cable old colours.
Standard multi core lines are available with 2 cores 3 cores 4 cores or 5 cores however some manufacturers offer rubber flexible cable variants with up to 19 conductive cores.
Cores should be marked as follows.
Sab colour code for rtd connection cables.
Marking inscription for identification of cores of electric cables number printing.
Normal household installation was.
N line conductors old and new conductors.
The flex cable flexible cord cable has three cores being live earth and neutral.
The new coloured cables are referred to as harmonised cables the colours are harmonised across the eu.
The usa have their own wiring colours for electrical circuits black red and blue are used for 208 vac three phase.