TS 2258 HD 402 S2

TS 2258 HD 402 S2 defines the standard colours used for thermoplastic insulation materials in low-frequency cables and wires. In practice, a colour standard like this supports consistent visual identification of conductors and cores, which is especially important during manufacturing, installation, testing, and maintenance.

Why colour coding matters in cable insulation

In low-frequency cabling, insulation colour is more than a visual choice: it is a technical identification tool. Colour conventions help distinguish individual cores, reduce wiring errors, and make products easier to recognise across different manufacturers. Thermoplastic insulation refers to polymer-based insulating materials that can be softened and shaped by heat, a common and practical choice for cable and wire production.

What this standard addresses

The stated scope makes clear that this standard applies to the standard colours for thermoplastic insulation used with low-frequency cables and wires. The emphasis is therefore on the colour system for insulation rather than on the full electrical design of the cable. That makes it relevant to colour identification and compatibility, while not implying that it covers every possible cable construction or manufacturing detail.

• Supports consistent colour meaning for low-frequency cables and wires.
• Applies to thermoplastic insulation materials.
• Helps distinguish cable cores visually.
• Reduces the risk of confusion in production and maintenance.