I-THHN I-Thermoplastic High-Heat-resistant Nylon-coated wire yiNylon yocingo olunye olunokufakwa kwe-PVC kunye nebhatyi yenayiloni.I-THWN yobushushu be-thermoplastic- kunye nocingo olukwaziyo ukumelana namanzi luyafana ne-THHN kwaye ezi zimbini zihlala zisetyenziswa ngokutshintshanayo.I-THWN ikwalucingo olunye lomqhubi kunye ne-PVC yokugquma kunye nebhatyi yenylon.I-THWN-2 ucingo ngokusisiseko lucingo lwe-THWN olunokhuseleko olongezelelweyo lobushushu kwaye lunokusetyenziswa kwiimeko eziphezulu kakhulu zokushisa (ukuya kwi-90 ° C okanye i-194 ° F).