How to check the temperature class of enameled wire？It always through thermal shock test．
For example, F-class test temperature is 175 ℃. And for example, the diameter is 0.50mm. The wire rod is wound with two times 10 laps, (wire) and then wound onto a good enameled baking 175 ℃ of bake in the oven for half an hour.
The normal situation is no gap. If there are cracks on enameled wire, it disclose that the heat level of the wire does not reach the heat specifications.
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