we would like to use the same lay out of der284 for our 15w led driver which we applied for UL recognition. As per my understanding the minimum distance between primary and secondary should be 6.4mm for UL approval. But in the gerber file of der284 it is observed that the mininmum distance between Primary bias negative point and secondary negative point is 5.6mm only. For your better understanding I am attaching a picture in which I marked the area where we get 5.6mm. Is it ok with this 5.6mm? Shall we follow the same gerber for getting UL approval? Please advice.