Harmonised Cable Core Colours 1 Introduction The requirements of BS 7671 were harmonized with the technical intent of CENELEC Standard HD 384.5.514: Identification, including 514.3: Identification of conductors, now withdrawn. Amendment No 2: 2004 (AMD 14905) to BS 7671:2001 implemented the following: The harmonized cable core colours and the alphanumeric marking of the following standards: HD 308 S2:2001 Identification of cores in cables and flexible cords BS EN 60445:2000 Basic and safety principles for man-machine interface, marking and identification of equipment terminals and of terminations BS EN 60446:2000 ... Read more