Waya wa THHN Thermoplastic High Heat-resistant Nylon-resistant nayiloni ndi waya wokonda imodzi wokhala ndi PVC insulation ndi jekete ya nayiloni.Waya wa THWN thermoplastic kutentha- ndi waya wosagwira madzi ndi wofanana ndi THHN ndipo awiriwa amagwiritsidwa 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).