Insulation Colour Scheme
MV cables
Single core |
Natural colour of the compound |
Three core |
Coloured tape or thread (e.g.: red - yellow - blue) |
0.6/1 kV Power and Control Cables
According to BS 6883/BS 7917 |
Alternatives |
|
1 core |
Red or Black |
White and numbered |
2 cores |
Red - Black |
White and numbered |
3 cores |
Red - Yellow - Blue |
White and numbered |
4 cores |
Red - Yellow - Blue - Black |
White and numbered |
Above 4 cores |
black numbers on white background |
|
150/250 V Instrumentation Cables
Pair |
Black - White |
Triple |
Black - White - Red |
Quad |
Black - White - Red - Blue |
Pairs/Triples/Quads are numbered with numbers printed directly on the insulated conductors (1-1; 2-2; …) or buy numbered tape |
|
Outer Sheath Standard Colours
MV power and control |
Red |
LV power and control |
Black |
Instrumentation and control |
Grey |
Other colours available on request |
|
