THW THHN a me THWN Wire Wehewehe

ʻO THHN, THWN a me THW nā ʻano uea uila hoʻokahi i hoʻohana ʻia i loko o nā hale a me nā hale e hoʻopuka i ka mana. Ma mua, ʻo THW THHN THWN nā uea ʻokoʻa me nā ʻae like ʻole a me nā noi. Akā i kēia manawa, eia kahi uea maʻamau THHN-2 e uhi ana i nā ʻae āpau no nā ʻano like ʻole o THHN, THWN a me THW.

1. He aha ka Uea THW?
ʻO ka uea Thw ke kū nei i ka uea thermoplastic, wela a me ka wai. Hana ʻia ia me ka conductor keleawe a me ka insulation PVC. Hoʻohana ʻia ia no nā kaapuni mana a me nā kukui i nā hale ʻoihana, ʻoihana a me nā hale noho. Hiki ke hoʻohana ʻia kēia ʻano uea ma nā wahi maloʻo a me ka pulu, ʻo kona wela kiʻekiʻe o ka hana ʻo 75 ºC a ʻo kāna volta o ka lawelawe no nā noi āpau he 600 V.

Eia kekahi, ʻaʻole ka "N" ka acronym THW no ka uhi ʻana i ka nylon. Ua like ke ʻano o ka uhi nylon me kahi ʻāpana plastik a pale i nā uwea ma nā ʻano like. Me ka ʻole o ka uhi nylon, ʻoi aku ka liʻiliʻi o ke kumu kūʻai uea THW akā hāʻawi ia i ka pale liʻiliʻi i nā pilikia kūlohelohe.

THW Wire Strandard
• ASTM B-3: Copper Annealed a i ʻole nā ​​uea palupalu.
• ASTM B-8: Nā mea hoʻokele keleawe i hoʻopaʻa ʻia ma nā ʻāpana concentric, paʻakikī, semi-paʻakikī a palupalu paha.
• UL - 83: Uea a me nā uwea i hoʻopaʻa ʻia me ka Thermoplastic Material.
• NEMA WC-5: Nā Uea a me nā Uea i hoʻopaʻa ʻia me ka Thermoplastic Material (ICEA S-61-402) no ka lawe ʻana a me ka hāʻawi ʻana i ka mana uila.

2. He aha ka Uea THWN THHN?
Hoʻohui ʻia ʻo THWN a me THHN i ka "N" ma ka acronymare, ʻo ia hoʻi, he uea i uhi ʻia nā nylon. Ua like ka uwea THWN me THHN. ʻO ka uea THWN he mea pale wai, e hoʻohui i ka "W" i loko o ka acronym. ʻOi aku ka maikaʻi o THWN ma mua o ka THHN i ka hana pale wai. Hiki ke hoʻohana ʻia ʻo THHN a i ʻole THWN no ​​ka mana a me nā kukui uila i nā ʻoihana ʻoihana, ʻoihana a me nā hale noho, kūpono lākou no nā hoʻonohonoho kūikawā ma o nā ala paʻakikī a e hoʻohana ʻia i nā ʻāpana abrasive a i haumia ʻia me nā aila, momona, ʻaila, etc.