Ka Wehewehe ʻana o ka Uea THW THHN a me THWN

ʻO THHN, THWN a me THW nā ʻano uea uila hoʻokahi alakaʻi i hoʻohana ʻia i loko o nā hale a me nā hale e hāʻawi i ka mana. Ma mua, ʻo THW THHN THWN he mau uea like ʻole me nā ʻae a me nā noi like ʻole. Akā i kēia manawa, eia kahi uea THHN-2 maʻamau 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 ke kaula THW ke kū nei no ka uea thermoplastic, pale wela a me ka wai. Hana ʻia ia me ke alakaʻi keleawe a me ka insulation PVC. Hoʻohana ʻia ia no nā kaapuni mana a me nā kukui ma nā hale ʻoihana, kalepa a me nā hale noho. Hiki ke hoʻohana ʻia kēia ʻano uea ma nā wahi maloʻo a pulu, ʻo kona mahana hana kiʻekiʻe loa he 75 ºC a ʻo kona voltage o ka lawelawe no nā noi āpau he 600 V.

Eia kekahi, ua nele ka huaʻōlelo THW i ka "N" no ka nylon-coated. Ua like ke ʻano o ka uhi nylon me kahi ʻāpana plastik liʻiliʻi a pale i nā uea ma nā ʻano like. Me ka ʻole o ka uhi nylon, ʻoi aku ka haʻahaʻa o ke kumukūʻai o ka uea THW akā hāʻawi ia i ka pale liʻiliʻi e kūʻē i nā pilikia kaiapuni like ʻole.

THW Wire Strandard
• ASTM B-3: Nā Uea Keleawe i Hoʻoheheʻe ʻia a Palupalu paha.
• ASTM B-8: Nā Alakaʻi Keleawe i Kau ʻia ma nā Papa Concentric, Paʻakikī, Semi-paʻakikī a i ʻole Palupalu.
• UL – 83: Nā Uea a me nā Kaula i Hoʻopaʻa ʻia me ka Mea Thermoplastic.
• NEMA WC-5: Nā Uea a me nā Kaula i Hoʻopaʻa ʻia me ka Mea Thermoplastic (ICEA S-61-402) no ka Hoʻoili a me ka Hoʻolaha ʻana o ka Mana Uila.

2. He aha ka uea THWN THHN?
ʻO THWN lāua ʻo THHN e hoʻohui ana i ka "N" i loko o ka acronymare, ʻo ia hoʻi he uea i uhi ʻia me ka nylon. Ua like ka uea THWN me THHN. He kūpaʻa wai ka uea THWN, e hoʻohui ana i ka "W" i loko o ka acronym. ʻOi aku ka maikaʻi o THWN ma mua o THHN i ka hana kūpaʻa wai. Hiki ke hoʻohana ʻia ʻo THHN a i ʻole THWN no ​​nā kaapuni mana a me nā kukui i nā hale ʻoihana, kalepa a me nā hale noho, kūpono loa lākou no nā hoʻonohonoho kūikawā ma o nā ducts paʻakikī a e hoʻohana ʻia i nā wahi abrasive a i ʻole i haumia me nā aila, ka momona, ka gasoline, a me nā mea kemika ʻē aʻe e like me nā pena, nā mea hoʻoheheʻe, a me nā mea ʻē aʻe.