... , mylar taped, tinned copper wire braid screen, PVC outer sheath. Grey. 300/500 volts grade generally to BS6500 and VDE 0250 ... numbers. 3 core and above - Black with White numbers plus Green/Yellow.Also available with colour codes as follows : 2 core ... , 4 core - Blue, Brown, Black, Green/Yellow, or Brown, Black, Grey, Green/Yellow. 5 core - Blue, Brown, Black, Grey, Green/Yellow.As per Cenelec HD ...