THW (Thermoplastic Thaum tshav kub kub thiab dej-resistant), THWN (Thermoplastic Thaum tshav kub kub thiab dej-resistant Nylon-coated), thiab THHN (Thermoplastic High Heat-resistant Nylon-coated) yog peb hom hluav taws xob xaim, txhua tus muaj cov yam ntxwv tshwj xeeb thiab tsim nyog siv. Nov yog kev sib piv:
THW yog ib lub hom phiaj dav dav uas feem ntau yog tus neeg xyuas pib ua los ntawm tooj liab thiab cov khoom siv rwb thaiv tsev ua los ntawm polyvinyl chloride (PVC). Yog tsis muaj nylon-coated sheath, THW xaim tuaj yeem siv tsis tau tsuas yog nyob rau hauv cov khoom siv hluav taws xob sab hauv tsev, tab sis kuj tseem nyob hauv cov kab hluav taws xob thiab hauv av, thiab muaj ntau yam kev siv. THW hlau yog dav siv nyob rau hauv North America thiab lwm cheeb tsam thiab yog nrov heev.
THWN hlau thiab THHN hlau, nrog ib qho ntxiv nylon txheej, muab kev tiv thaiv ntxiv tiv thaiv kev puas tsuaj, tshuaj lom neeg, thiab ya raws. THWN hlau yog ntsuas rau siv hauv qhov chaw ntub lossis qhuav. Tiv thaiv kub txog li 75 degree (167 degree F) hauv qhov chaw ntub dej thiab mus txog 90 degree (194 degree F) hauv qhov chaw qhuav. Siv rau hauv qhov chaw ntub dej, xws li kev siv sab nraum zoov thiab hauv av, thiab hauv cov kav dej lossis kev sib tw. THHN hlau yog siv rau kev siv dav dav hauv kev lag luam thiab cov tsev lag luam, feem ntau hauv cov kav dej lossis cov chaw sib tw, hauv qhov chaw qhuav tau ntsuas txog 90 degree (194 degree F).
