Video: Kcmil cable yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
kcml ua -Hauv North American kev lag luam hluav taws xob, cov neeg siv hluav taws xob loj dua 4/0 AWG feem ntau raug txheeb xyuas los ntawm thaj chaw hauv ntau txhiab mils ( kcml ua ), qhov twg 1 kcml ua Luas = 0.5067 mm². Ib ncig mil yog thaj tsam ntawm a hlau ib mil diam. MCM-ib txhiab mais.
Ces, Kcmil txhais li cas?
Glossary Term: kcml ua MCM yog ib daim ntawv luv rau ntau txhiab lub voj voog, ib qho kev ntsuas qub ntawm cov xov hlau ntsuas. 1 MCM = 1 kcml ua luas = 0.5067 m². Ib mil yog 1/1000 hli. Ib txoj kab uas hla 200 mils yog 40 MCM. MCM yog feem ntau siv rau cov hlau loj heev.
Ib yam li ntawd, qhov loj npaum li cas yog 250 Kcmil hlau? Piv txwv li, ib yam hlau loj siv hauv NEC muaj ntu ntu ntawm 250,000 ncig mils, sau ua 250 kwm los yog 250 MCM, uas yog thawj qhov loj loj tshaj 0000 AWG siv nyob rau hauv NEC. 1000 ncig mil sib npaug 0.5067 mm2, yog li rau feem ntau lub hom phiaj, qhov piv ntawm 2 MCM ≈ 1 mm2 tuaj yeem siv nrog qhov tsis txaus ntseeg (1.3%) yuam kev.
Raws li txoj cai, MCM puas zoo ib yam li Kcmil?
Ob leeg MCM thiab kcml ua txhais tau tias 1,000 ncig mils, uas yog ib chav tsev siv los ntsuas thaj tsam ntawm lub voj voog hla ntawm ib lub xaim. Cov ntsiab lus MCM thiab kcml ua yog siv sib hloov los ntawm National Electric Code los piav txog cov xov hlau uas loj dua 0000 American hlau ntsuas.
MCM txhais li cas rau hlau loj?
MCM yog ib qho luv luv rau ntau txhiab lub voj voog, ib qho kev ntsuas qub ntawm kab ntsuas . 1 MCM 1 kcmil = 0.5067 m² os. Ib mil yog 1/1000 nti. A hlau 200mil ib txoj kab uas hla yog 40 MCM . MCM feem ntau yog siv rau loj heev- txoj kab uas hla.
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