Electrical Wire Color Code Hong Kong

This article describes the electrical wiring color code conventions for 120v or 240v ac circuit wiring in buildings in canada the us the uk. To enable wires to be easily and safely identified all common wiring safety codes follow a structured color scheme for the insulation of electrical wire.

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Electrical wire color code hong kong. In some jurisdictions all wire colors are specified in legal documents. We know that the power can be in either single phase or three phase. Wiring for ac and dc power distribution branch circuits are color coded for identification of individual wires. What the color of an electrical wire means for you if you live in the united states and your home was built after the 1940s or your outdated wiring has since been updated you can expect the electrical wires behind your walls to follow certain color standards. There are local rules and exceptions that exist based upon the exact application. Beyond that are general industry accepted rules about wire color that indicate their purpose. In that case local custom dictates the optional wire colors. But a general color code is used to identify different types of conductors which are used in electrical wiring. In the old cable colour code the colours of blue and black are used to identify phase and neutral conductors respectively. From 1 july 2009 new colour coded cables have to be used in new fixed electrical installations in hong kong. In hong kong registered electrical contractors are required to carry out any electrical work eg. Each wire used for electrical wiring is marked with information like wire gauge ampacity maximum voltage and maximum temperature. In other jurisdictions only a few conductor colors are so codified. The national electrical code nec says that white or gray must be used for neutral conductors and that bare copper or green wires must be used as ground wires. Working group on the review of cable color code in hong kong working group was set up in 2003 to study the impacts of the change in cable colour code for fixed electrical installations and to make recommendations on the way forward regarding the cable colour.

Quoting from authoritative codes standards for each region we provide a table summarizing the current and prior wiring color code conventions used by electricians in building wiring. We use cookies to give you the best possible experience on our website. Addition to alteration of inspection testing and repair of an electrical installation including those in connection with a renovation work.