TS EN IEC 60757

TS EN IEC 60757 defines letter codes used to designate colours in technical documentation for electrical installations, electrical equipment and products, and it gives rules for combining those codes to express colour combinations. In practical terms, it is a coding standard for colour names and combinations, not a standard for how colours should be visually rendered or represented.

In general technical practice, colour designation systems help reduce ambiguity in diagrams, wiring information, markings, maintenance manuals and product documentation. Because colour names can vary by language, industry usage or local convention, a compact code provides a consistent way to identify a colour and, where needed, a combination of colours.

Where the standard applies and where it does not

According to the document scope, the letter codes are intended for use in the technical documentation of electrical installations, electrical equipment and products, as well as in markings on electrical equipment and products. The standard does not define requirements for encoding colour properties themselves, nor for the visual appearance of colours; those matters remain under the responsibility of the relevant technical committees and are only applicable when specifically referenced in related publications. It is also framed as a basic safety publication intended primarily for technical committees when preparing safety publications.

• Letter codes for colour designation
• Rules for combining codes to designate colour combinations
• Use in technical documentation and equipment markings
• No requirements for visual colour representation