IEC 60228
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IEC 60228 is the International Electrotechnical Commission's international standard on conductors of insulated cables.
Among other things, it defines a set of standard wire cross-sections:
| International standard wire sizes (IEC 60228) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0.5 mm² | 0.75 mm² | 1 mm² | 1.5 mm² | 2.5 mm² | 4 mm² | ||||
| 6 mm² | 10 mm² | 16 mm² | 25 mm² | 35 mm² | 50 mm² | ||||
| 70 mm² | 95 mm² | 120 mm² | 150 mm² | 185 mm² | 240 mm² | ||||
| 300 mm² | 400 mm² | 500 mm² | 630 mm² | 800 mm² | 1000 mm² | ||||
In engineering applications, it is often most convenient to describe a wire in terms of its cross-section area, rather than its diameter, because the cross section is directly proportional to its strength, weight, and resistance. The cross-section area is also roughly proportional to the maximum current that a wire can carry safely.
