Waya wa THHN Thermoplastic High Heat-resistant Nylon-resistant nayiloni ndi waya wokonda umodzi wokhala ndi insulation ya PVC ndi jekete ya nayiloni.Waya wa THWN wa thermoplastic wotentha komanso wosagwira madzi ndi wofanana ndi THHN ndipo ziwirizi zimagwiritsidwa ntchito mosiyanasiyana.THWN ilinso waya wokonda umodzi wokhala ndi insulation ya PVC ndi jekete ya nayiloni.Waya wa THWN-2 kwenikweni ndi waya wa THWN wokhala ndi chitetezo chowonjezera kutentha ndipo ungagwiritsidwe ntchito pakatentha kwambiri (mpaka 90 ° C kapena 194 ° F).