Ehia mau uwea ma 1/2 EMT?

Ua ʻike paha ʻoe i ka nui o nā uea e lawe ana i ka nui o ke au e hoʻohua i ka wela e hoʻoheheʻe i ka uhi vinyl, e hana ana i kahi pōʻino ahi?

Wahi a ESFI, ma kahi o 51,000 mau ahi, 1,400 mau ʻeha, a me $ 1.3 biliona o ka pōʻino waiwai i loaʻa i kēlā me kēia makahiki ma US ma muli o ke ahi home. Hōʻike kēia mau ʻikepili e pono ʻoe e hoʻokomo i ka uwea kūpono e pale ai i kāu waiwai. ʻO ia ke kumu e aʻo aku ai au iā ʻoe i ka helu kūpono o nā uea no 1 EMT ma kaʻu ʻatikala.

Paipai au iā ʻoe e hoʻomau i ka heluhelu ʻana no ka ʻike ʻana i ka nui o nā uea hiki iā ʻoe ke hoʻokomo i nā nui ʻē aʻe o nā ducts cable:

Ehia mau uwea i loko o ka auwai 1/2?

ʻO ka helu o nā uea paʻa i hiki ke komo i loko o ke auwaha ½-ʻīniha e hilinaʻi mau i ke ʻano o ke ala uila āu e hoʻohana nei.

Loaʻa ka pilikia o ka nui o nā kaula i loko o kahi auwai e lawe ana i ka nui o ke au e hoʻohua i ka wela e hoʻoheheʻe i ka uhi vinyl ma nā uea paʻa, e hana ana i kahi pōʻino ahi nui. ʻO ka ʻike kūpono o ka mea conduit ka hana mua i ka hoʻoholo ʻana i ka hiki ke hoʻopiha.

Inā ʻaʻole hiki iā ʻoe ke hoʻohana i ke kelepona NM no ka pale ʻana i nā uea uila i hōʻike ʻia, ʻo ia ka manawa e hoʻohana ai ʻoe i ke kahawai uila ma ke ʻano he pani.

Loaʻa i ka ʻauwaʻa uila ka helu kiʻekiʻe o nā uwea uila e hiki ke holo i loko o ia, inā i hana ʻia me ka metala paʻa (EMT), ka ʻilika paʻa (PVC conduit), a i ʻole ka metala hikiwawe (FMC). He ana i hoʻonohonoho ʻia e ka National Electrical Code a me ka nui o nā code kūloko e hana ana ma ke ʻano he code statutory kiʻekiʻe loa ma kēlā me kēia wahi.

No ke kōkua ʻana iā ʻoe e ʻike i ka nui o nā uea ma 1 2 EMT, aia ma lalo kahi papa mai ka National Electrical Code e kōkua iā ʻoe e hoʻokele:

ka nui	ʻAno paipu	14AWG	12AWG	10AWG	8AWG
	EMT	12	9	5	3
1/2 iniha	PVC-Sch 40	11	8	5	3
	PVC-Sch 80	9	6	4	2
	FMC	13	9	6	3
	EMT	22	16	10	6
3/4 iniha	PVC-Sch 40	21	15	9	5
	PVC-Sch 80	17	12	7	4
	FMC	22	16	10	6
	EMT	35	26	16	9
1-ʻīniha	PVC-Sch 40	34	25	15	9
	PVC-Sch 80	28	20	13	7
	FMC	33	24	15	9

ʻO wai ka mea maikaʻi, EMT a i ʻole PVC conduit?

Hiki iaʻu ke kōkua iā ʻoe e hoʻoholo inā e hoʻopaʻapaʻa ana ʻoe ma waena o ka paipu metala uila a me ka paipu PVC a me ka conduit EMT. ʻOi aku ka maikaʻi o ka PVC a me ke kila ma mua o nā alumini EMT, ʻoi aku ka ikaika a ʻoi aku ka lōʻihi.

Eia nā pōmaikaʻi ʻelima o ka hoʻohana ʻana i ka alumini EMT:

• ʻOiai he 30% ke kaumaha o ka alumini ma mua o ke kila, ua like ka ikaika. Hiki i ke kila ke lilo i palupalu ke ʻike ʻia i nā mahana haʻahaʻa, ʻoiai ʻoi aku ka ikaika o ka alumini.
• Hiki ke ʻoki maʻalahi, kūlou a hoʻopaʻa ʻia ka alumini me ka ʻole o nā mea hana kūikawā.
• Pale ka alumini i ka radiation electromagnetic, e pale ana i ka hoʻopili ʻana i kāu mau mea uila koʻikoʻi.
• Me ka wela, ʻo ka alumini ka mea hoʻokele uila maikaʻi loa. Paʻa mau ia i ka hoʻopā ʻana, no ka wela a me ke anu paha o waho.
• ʻO kekahi ʻano maikaʻi o ka alumini kona kūpaʻa ʻana i ka corrosion. Mālama maoli ka Aluminum iā ia iho ma ka hana ʻana i kahi uhi oxide lahilahi ke ʻike ʻia i ka oxygen. ʻO ka hopena, ʻaʻole ia e ʻino e like me ke kila. No ka pale hou ʻana i ka metala mai ka ʻinoʻino, hana ʻia nā mea hana anodize. (1)

E nānā i kekahi o kā mākou ʻatikala ma lalo nei.

• He aha ka nui uea no 30 amps 200 kapuai
• Pehea e hoʻopili ai i nā uwea uila
• Pehea e hana ai i nā uwila uila ma kahi haʻahaʻa i hoʻopau ʻole ʻia

koi

(1) Aluminum – https://www.livescience.com/28865-aluminum.html

(2) ʻike i ka oxygen - https://www.sciencedirect.com/topics/

ʻenekinia / ʻike oxygen