Electric Cable Colours Old And New

The usa have their own wiring colours for electrical circuits black red and blue are used for 208 vac three phase.

Electric cable colours old and new. If you have the previous colours red black and green earth or bare earth very dangerous we would recommend you have an electrician test to check the integrity of the cable as it could be more than 50 years old and unreliable. The old as nzs red active wire colour was replaced by a brown active wire. Low voltage connections use black red and blue live lines.

You should also be looking at the condition of cables as well as the sheathing of the cables. The usa have their own electrical cable colours three phase or single phase circuits. Australia also have a different wiring colour standard.

The old as nzs black neutral wire colour was replaced by a blue neutral wire. If there is any mixing of old and new style uk wiring colours then the cables should be clearly marked to prevent the incorrect application of the phase and neutral. Brown orange and yellow are used for 480 vac.

Any other colors expected the above mentioned can be used for live line or hot wires. As previously mentioned the old style black neutral wiring has been replaced with blue. The uk s new cable colours for plugs are now harmonise with europe s power cable colours for ac dc.

Similarly red live wiring is now brown. Such change may cause confusion to electrical workers. Alternatively high voltage connections us brown orange and yellow 480 vac live lines.

In the old cable colour code the colours of blue and black are used to identify phase and neutral conductors respectively. Just opposite to the existing colour scheme. In the new cable colour code the colours of blue and black are used to identify neutral and phase conductors i e.