You will never run a coil anywhere near melting point, in fact you will be lucky to achieve working temperatures of 200C without many troubles. Probably a realistic coil temperature is 150 or so deg C for any length of time. What the wire can take at this temperature depends on the cooling available. For conventional transformers a reasonable rating for 1mm wire is about 3A. for short term overload short time rating perhaps 5A.

For wind power the ratio of peak to mean power and forced wind cooling may let you achieve even more than 5A and you also have to consider the winding and how the current shares between phases so a 1mm winding may achieve possibly 20A short term.

With all these things it is a current/life trade off. You may push a winding quite hard and get 2 year life but you would have to go much easier to get 10 year life.