Bs En/iec 60228 -

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

Aluminium conductors have higher resistance – roughly 1.6× the copper value. bs en/iec 60228

Here is an extract for (Class 2, the most common for fixed power cables): 16 – 25 – 35 – 50 –

0.5 – 0.75 – 1 – 1.5 – 2.5 – 4 – 6 – 10 Need to check a specific conductor size or resistance value

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 |