Ambient temperature is 60deg Celsius.What is flexible copper cable size to be used for 63A breaker in side low voltage switchgear panel?

Ambient temperature is 50deg Celsius.What is flexible copper cable size to be used for 63A breaker in side low voltage switchgear panel

You posted two temperatures. Which is it, or both?

What country are you from?

Refer to the Code or Standard your location uses to learn of the ambient temperature multiplier factor to increase the conductor size that would be used at normal room temperature.

Looks like yet another test question to me. :rolleyes: