Old And New Electric Cable Colours

As previously mentioned the old style black neutral wiring has been replaced with blue.

Old and new electric cable colours. Other line conductors may be brown black red orange yellow violet grey white pink or turquoise. 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. The usa have their own electrical cable colours three phase or single phase circuits.

Just opposite to the existing colour scheme. Such change may cause confusion to electrical workers. The usa have their own wiring colours for electrical circuits black red and blue are used for 208 vac three phase.

Power circuit line conductors should be coloured as in table 51. Other countries like china russia ksa and uae now follow the iec cable color codes for dc. Brown orange and yellow are used for 480 vac.

In the old cable colour code the colours of blue and black are used to identify phase and neutral conductors respectively. New cable colour code. You should also be looking at the condition of cables as well as the sheathing of the cables.

The uk s new cable colours for plugs are now harmonise with europe s power cable colours for ac dc. From 1 mar 09 onwards all new electrical installations including addition and alteration to existing electrical installations may use new colour cables of brown black grey for line blue for neutral and green and yellow for earth as set out in the amended ss cp5. 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.

In the new cable colour code the colours of blue and black are used to identify neutral and phase conductors i e. So one must test with a tester to confirm the phase and neutral as well as positive and negative wires. Alternatively high voltage connections us brown orange and yellow 480 vac live lines.