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Correct wiring color code [Update 2020]

March 5, 2020 | POSTED IN: Articles

Correct wiring color code [Update 2020]

Wiring color code


Tai Sin started its production in 1980. With time the company evolved and expanded its business in different manufacturing categories. Tai Sin manufactures quality cables and wires for different voltages which are classified into low voltage cables, medium voltage cables and instrumentation cables. The cables and wires are manufactured with high quality material in order to compete against the market with long lasting performance and reliability. From the last three decades, the company enlarged its production and it was presented as Tai Sin Electric Limited “Tai Sin”. The company was listed on the Catalist name Stock Exchange of Singapore in the year 1998. Tai Sin deals with the manufacturing of high-quality cables which are used in different sectors of distribution and industries. Tai Sin company has built strong partnerships with the main contractors and reputed consultants to improve its product quality and quantity at the same time. Different electrical cables are provided by the company and different wiring solutions for the public and private sectors are also offered by the company.

Compliance standards:

Different companies manufacturing cables and wires in Singapore follow the compliance standards set by the government of Singapore in the manufacturing of different products. The compliance standards are followed by the company to provide a global product throughout the country. Different rules linked with the different products and their standards are followed by Tai Sin cables for quality products.


Types of Wire Color Codes:

The color codes for electrical wires are different in different countries. Each country has its manufacturers for the manufacturing of the wires for electricity and the color coding for the wiring is set by the government organization which is followed throughout the country by all manufacturers. The different color coding schemes for wires are used to identify the different categories of wires from a bulk of wires. For example if same color coding is used for overall wiring then it will be difficult to identify the neutral, live or earth wire.  The color coding of cables is different in different countries for U.K, neutral wire is represented by blue color, main or the live wire is represented by brown and the earth cable or wire is represented by green and yellow. There are two color codes for wires in Singapore. One wiring code is the old color code and the second is the latest color code set by the government which is being followed now across the country. As per the old color coding, red, yellow or blue was used to represent the main or the live wire, neutral wire was represented by black and earth was represented by yellow and green combined color cable. According to new color coding [1], in a single-phase brown cable represents the mainline, neutral wire is represented by the blue line in single and three-phase. Earth wire is represented by the green and yellow lines in both phases. For a three-phase system mainline or live wire is represented by brown, black and grey.


How to apply to the existing wiring?

The color coding for wires was updated in Singapore a few years ago. The wirings are done before the change of color code still exists and to repair or maintain those previous wiring new wires are used which mix up the colors. Different companies provide better repairing and replacing solutions for the previous wiring. However, a professional electrician is familiar with the previous color coding and the modern color coding as well and he can easily apply new color-coding to the existing wirings. In the old wirings, the live or main wire is in red, the neutral wire is represented by black and the earth wire is represented by green. A professional electrician can identify each previous color-coded wire and can apply new wire to the existing wire easily.


Guidelines to color coding according to Standard (OSHA, ANSI): [2]

OSHA has defined two colors for safety requirements. According to OSHA, red color and yellow color should be used to mark different physical hazards. For fire-related hazards, red color must be used and for physical hazards and caution yellow color must be used. 

ANSI has defined colors for various safety signs and boards. The red color sign represents the fire hazard. Dangerous equipment and machines are represented by a board of orange color with a warning. The different hazards are represented by yellow signs and boards. General safety signs are displayed in green color signs and boards as per ANSI. Blue signs and notices communicate information related to the hazards of the workplace.


Tips on Cable management:

Cable management is an important concern which can be hazardous if not managed properly. Different cables should be tied together for proper management. The cables should be labeled and color-coded for proper management. Proper insulation for the cables should be provided.



[1] “New Cable Colour Code for Electrical Installations”,, 2020. [Online]. Available: [Accessed: 25- Feb- 2020].

[2] “OSHA and ANSI Safety Colors | Graphic Products”,, 2020. [Online]. Available: [Accessed: 25- Feb- 2020].