Home
About Us
Products
Download
Technical Lib
Contact
Enquiry
Sitemap
Links
 
Alarm & Audio & Electronic Cables
Automotive Cables
Airport Cables
Belden Equivalent Cables
Bus Cables
Coaxial Cables
Cables for Oil Industry
Control Cables
Composite Cables
Data Cable
Fiber Optic Cables
Flexible Cables
Fire Resisting Cable(Fireflex)
Fire Retardant Cable(FIRETOX)
Flame Retardant Cable (FIREGUARD)
High Temperature Cables
Highway Cables
Instrumentation Cables
Industrial Cables
Lan Cables
Mining Cables
Military Cables
Medium Voltage Cables
NEK606 Offshore & Marine Cable
Marine, OIL,GAS & Petrochemical Cables
Power Cables
Railway Cables
Robotics
Rolling Stock Cables
Rubber & Crane Cables
Security Cables
Special Cables
Shipboard Cables(JIS)
Spiral Cables
Submarine Cables
Submersible Pump Cables for Oil Industry
Telephone Cables
Thermocouple Cables
Windmill Cable
Other Cables
BS 5308 Cable
PAS 5308 Cable
BS 5467 Cable
BS 6724 Cable
BS 6346 Cable
BS 7211 Cable
IEC 60502-1 Cable
En 50288-7 Cable
NF M 87-202

 
 

New Cable Colour Code

With effect form 2007, colour for identification of conductors in fixed electrical installations will be changed, and the details are shown below.


Table 1 - Change of Cable Colour Code

Source: HK EMSD

The change is applicable to all new electrical installations as well as addition & alteration to existing electrical installations. Existing installations with cables adopting the old cable colour code will not be affected.

The new cable colour code complies with the requirements of relevant national and international standards (such as IEC 60446, EN 60446, BS EN 60446 and BS 7671) and has been adopted by the majority of the western countries (e.g. UK, France, Germany, Spain, Netherlands, Portugal etc.).

Precautions
In the new colour code, the black core will be changed from neutral to phase and the blue core from phase to neutral. Wrong connection of these cores will lead to increased risk, leading to possible electrical accidents and short circuiting, in particular during the transition period. To ensure electrical safety, it is recommended not to conduct, whenever practicable, works on "LIVE" installations at any cable colour change interfaces. Where serious inconvenience would arise from isolating electrical circuits for works at the cable colour change interfaces, adequate safety precautions should be taken to avoid danger from "LIVE" working conditions.

Installation Guides - New Installation
The old cable colour code, i.e. red, yellow and blue for phase conductors and black for the neutral conductor, are to be replaced by the new one, i.e. brown, black and grey for phase conductors and blue for the neutral conductor, as specified in Table 1. Circuits for new installations should be wired in new colour coded cables.

For a single phase installation, only the brown colour should be used to identify a phase conductor, irrespective of whether it is connected to the L1, L2 or L3 phase. For a room /flat /unit taking single phase electricity supply from a multi-phase power supply source, only brown (phase) and blue (neutral) coloured cables should be used.

Source: HK EMSD (2007), http://www.emsd.gov.hk