THW THHN thiab THWN Wire Explanation

THHN, THWN thiab THW yog txhua yam ntawm ib qho hluav taws xob xaim hluav taws xob siv hauv tsev thiab tsev kom xa hluav taws xob. Yav dhau los, THW THHN THWN yog cov xov hlau sib txawv nrog kev pom zoo thiab kev siv sib txawv. Tab sis tam sim no, ntawm no yog tam sim no THHN-2 xov hlau uas npog tag nrho cov kev pom zoo rau txhua qhov sib txawv ntawm THHN, THWN thiab THW.

1. THW Hlau yog dab tsi?
Thw hlau stands rau cov thermoplastic, tshav kub-thiab dej-resistant hlau. Nws yog ua los ntawm tooj liab conductor thiab PVC rwb thaiv tsev. Nws yog siv rau hluav taws xob thiab teeb pom kev zoo circuits hauv kev lag luam, kev lag luam thiab cov chaw nyob. Hom hlau no tuaj yeem siv rau hauv qhov chaw qhuav thiab ntub dej, nws qhov siab tshaj plaws ntawm kev ua haujlwm yog 75 ºC thiab nws qhov hluav taws xob ntawm kev pabcuam rau txhua daim ntawv thov nws yog 600 V.

Tsis tas li ntawd, lub ntsiab lus THW ploj lawm "N" rau nylon-coated. Cov txheej nylon zoo li me me ntawm cov yas thiab tiv thaiv cov xov hlau zoo sib xws. Yog tsis muaj cov nylon txheej, THW hlau tus nqi kuj pheej yig tab sis nws muab kev tiv thaiv tsawg heev rau ntau yam kev phem ib puag ncig.

THW Hlau Strandard
• ASTM B-3: Copper Annealed lossis Mos Wires.
• ASTM B-8: Copper Stranded Conductors nyob rau hauv Concentric Layers, Hard, Semi-hard los yog mos.
• UL – 83: Hlau thiab Cables Insulated nrog cov khoom siv thermoplastic.
• NEMA WC-5: Hlau thiab Cables Insulated nrog Thermoplastic Khoom (ICEA S-61-402) rau kev sib kis thiab faib hluav taws xob.

2. THWN THHN Hlau yog dab tsi?
THWN thiab THHN tag nrho ntxiv cov "N" nyob rau hauv lub ntsiab lus, uas txhais tau hais tias lawv yog cov nylon-coated hlau. THWN hlau zoo ib yam li THHN. THWN xaim yog dej-resistant, ntxiv "W" rau hauv cov ntawv sau. THWN yog qhov zoo dua li THHN hauv kev ua haujlwm tsis muaj dej. THHN lossis THWN txhua tus tuaj yeem siv rau lub zog thiab teeb pom kev zoo hauv kev lag luam, kev lag luam thiab cov chaw nyob, lawv tsim tshwj xeeb rau kev teeb tsa tshwj xeeb los ntawm cov ducts nyuaj thiab siv rau hauv thaj chaw abrasive lossis polluted nrog roj, roj, roj av, thiab lwm yam corrosive chemicals li xim, hnyav, thiab lwm yam.