Cores Identification

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
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