How much square wire is 300/500v

A 300/500v cable represents 1 mm square wire.

The first cable number indicates the rated voltage between the cable core and the ground or the rated voltage between the cable core and the metal shield; the latter indicates the rated voltage between the cable core and the cable core.

The length is the main intuitive method to distinguish products that meet national standards from counterfeit and inferior products. When purchasing, don't be greedy for cheap prices. When purchasing wires and cables with 90m or 80m, or even no length marking, the length must meet the standard requirements of 100±0.5m, that is, 100m as the standard, and the allowable error is 0.5m).

Extended information:

The wire load current value specified in the national standard GB/T4706.1-2005 (part)

The permissible long-term load current of 1 square copper core wire is: 8A—12A;

The allowable long-term load current of 1.5 square copper core wire is: 12A—15A;

The allowable long-term load current of 2.5 square copper core wire is: 16A—25A;

The allowable long-term load current of 4 square copper core wires is: 25A—32A;

The allowable long-term load current of 6 square copper core wires is: 32A—40A;

Note: The above "square" refers to "square millimeter".