THHN Thermoplastic High Heat-resistant Waya mai rufi nailan waya ce mai gudanarwa guda ɗaya tare da rufin PVC da jaket nailan.THWN thermoplastic zafi- da waya mai jure ruwa shine ainihin iri ɗaya da THHN kuma ana amfani da su sau da yawa tare.THWN kuma waya ce mai jagora guda ɗaya mai rufin PVC da jaket nailan.Wayar THWN-2 shine ainihin waya ta THWN tare da ƙarin kariyar zafi kuma ana iya amfani dashi a cikin yanayin zafi mai zafi (har zuwa 90 ° C ko 194 ° F).