Registered Electrical Contractor, Consultant, Property Developer

In the old cable colour code, the colours of blue and black are used to identify phase and neutral conductors respectively. In the new cable colour code, the colours of blue and black are used to identify neutral and phase conductors (i.e. just opposite to the existing colour scheme). Such change may cause confusion to electrical workers. The use of old and new cable colours in the same electrical installations may give rise to electrical accidents if electrical workers do not pay due attention to their wiring works. To avoid electrical accidents, you are reminded to ensure that all electrical workers employed are aware of the change and have attended appropriate training before working on the electrical installations.

The change enables Hong Kong to align its cable colour system with the standards adopted by the majority of western countries (e.g. the UK, France, Germany, Spain, Netherlands and Portugal etc.). The change can ensure a stable and continuous supply of power cables to Hong Kong from the U.K. and other western countries at reasonable and steady prices.

Registered Electrical Worker and Trade Worker

In the old cable colour code, the colours of blue and black are used to identify phase and neutral conductors respectively. In the new cable colour code, the colours of blue and black are used to identify neutral and phase conductors (i.e. just opposite to the existing colour scheme). Such change may cause confusion to electrical workers. The use of old and new cable colours in the same electrical installations may give rise to electrical accidents if electrical workers do not pay due attention to their wiring works. To avoid electrical accident, you are reminded to attend appropriate training before installation of any new coloured cables. From January 2007 onwards, when an application for registration as a REW is received (including new/renewal/change of registration), EMSD will check the CCC training record of the applicant before processing his application.

Regarding training on the new cable colour code, please visit the webpage on "Training for the Trade"