BS 6883 armoured cable wire colours code
Identification of conductors in ac power and lighting circuits
Conductor Colour
Protective conductor Green-and-yellow
Neutral Blue
Phase of single phase circuit Brown
Phase 1 of 3-phase circuit Brown
Phase 2 of 3-phase circuit Black
Phase 3 of 3-phase circuit Grey
BS 6883 armoured cable wire colours code table:
a) Colour code
1 core red or black
2 core red, black
3 core red , yellow, blue
4 core red , yellow, blue, black
5 core and above According to the sequence coding

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