Can you used a 10mm cable for a 50 a breaker?

Using a 10mm cable for a 50 A breaker is generally not recommended, as it may not be sufficient to safely handle the current. The appropriate cable size depends on various factors, including the length of the run and the installation conditions. Typically, a larger cable, such as 16mm² or 25mm², is recommended for a 50 A breaker to ensure safety and minimize voltage drop. Always consult local electrical codes and a qualified electrician for specific applications.