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

Control Cables

Cable Glands
Data Cable

Fiber Optic Cables

Flexible Cables

Fire Resisting Cable
Heat Detection Cables
High Temperature Cables
Highway Cables

Instrumentation Cables

Industrial Cables
Lan Cables
Mining Cables
Military Cables
Medium Voltage Cables
Marine Cables
Marine, OIL,GAS & Petrochemical Cables
Power Cables
Railway Cables

Robotics

Rolling Stock Cables
Rubber & Crane Cables
Security Cables
Special Cables
Spiral Cables

Telephone Cables

Thermocouple Cables

Undersea Cables

Windmill Cable

Other Cables

BS 5308 Cable

BS 5467 Cable

BS 6724 Cable

BS 6346 Cable

BS 7211 Cable

IEC 60502-1 Cable
 

 
 

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