Technical Documents - Colour Codes
JB, OB, JZ & OZ
Below is a breakdown of the 4 different types of colour coding using J, O, B & Z codes.
J = Includes a Green/Yellow Earth Conductor
B = Colour Coded Cores
O = Without a Green/Yellow Earth Conductor
Z = Black Cores with White Numbering (Number Coded)
- As an example, a 5core cable has 4 number coded cores and 1 Green/Yellow core.
- A 12core cable has 11 number coded cores and 1 Green/Yellow core.