THHN Thermoplastic Heat Heat-U adkaysta Silig Naylon-ku dahaaran waa hal kirishbooye oo leh dahaarka PVC iyo jaakad naylon ah.THWN kulaylka kulaylka-iyo siliga biyaha u adkaysta ayaa asal ahaan la mid ah THHN labadana waxaa badanaa loo istcimaalaa si is beddel ah.THWN sidoo kale waa silig keli ah oo leh dahaarka PVC iyo jaakad nylon ah.THWN-2 silig asal ahaan waa silig THWN ah oo leh ilaalin kulayl dheeri ah waxaana loo isticmaali karaa xaaladaha kulaylka aadka u sarreeya (ilaa 90°C ama 194°F).