Bs En/iec 60228 !free! Review

16 – 25 – 35 – 50 – 70 – 95 – 120 – 150 – 185 – 240 – 300 – 400

Next time you pick up a cable, remember: the mm² rating is a promise. The resistance table is the proof. Need to check a specific conductor size or resistance value? Always refer to the latest official edition of BS EN/IEC 60228 (current version: 60228:2005, confirmed to BS in 2019).

| Nominal area (mm²) | Max. resistance (Ω/km) at 20°C | |--------------------|-------------------------------| | 1.5 | 12.1 | | 2.5 | 7.41 | | 4 | 4.61 | | 6 | 3.08 | | 10 | 1.83 | | 16 | 1.15 | | 25 | 0.727 | | 35 | 0.524 | | 50 | 0.387 | | 70 | 0.268 | | 95 | 0.193 | | 120 | 0.153 | | 150 | 0.124 | | 185 | 0.0991 | | 240 | 0.0754 | bs en/iec 60228

500 – 630 – 800 – 1000 – 1200 – 1600 – 2000 – 2500 You will never see a 30 mm² or 80 mm² conductor in a compliant cable. Stick to the list. The Most Important Table: Maximum Resistance The true heart of the standard is the maximum DC resistance at 20°C. This prevents manufacturers from using cheap, impure copper or undersized strands.

In this article, we’ll break down what the standard covers, why it matters, and how to use it correctly. BS EN/IEC 60228 is the British Standard (BS) adoption of the international standard IEC 60228 , titled "Conductors of insulated cables." 16 – 25 – 35 – 50 –

Aluminium conductors have higher resistance – roughly 1.6× the copper value.

If you have ever specified a cable, terminated a wire, or calculated voltage drop, you have relied on BS EN/IEC 60228 – even if you didn’t know it. This standard is the international foundation for classifying conductors by their cross-sectional area and resistance. Always refer to the latest official edition of

Here is an extract for (Class 2, the most common for fixed power cables):