Outer jekesti Mutsara inoratidza kushandiswa kwakashandiswa
Mune michina isina kukwana yakashongedzwa (NM) inoshandiswa kwekugara uye yekutengeserana wiring, ruvara rwekunze rweheati rinoratidza kuvhara kwematare kana kusima uye kuenzaniswa kwemafuta mukati mematare mukati. Pamberi pe1991, vazhinji veNM cable vakange vane jacket yechena yakachena, asi kutanga muna 2001, nheyo yeNM-B yakawanda yakasungirirwa nevinyl kunze kwekusungirirwa iyo yakasvibiswa kuti ione iyo yevashandi nevashambadzi. Iri ruvara rwekutsvaga rwetambo sheath rinongoda kuzvipira, asi vazhinji vanogadzira zvino vakatevera zvakakodzera pakunamatira kumarambo.
Zvishanu zvitsuwa zvemuvara zvinoshandiswa muNM cable mumakamuri ekuvakwa zvakachena, zhizha, zeramandara, dzvuku uye dzakachena. Aya mavara anoonekwa mune rakasimba vinyl jacket kunze iyo inowedzera munhu mumwe nomumwe mufambi mukati memukati, uye inowanikwa nyore nyore.
Ngwarira kuti dema rinoshandiswa semuvara wematareji maviri akaenzana, saka kumwe kutarisirwa kunodikanwa pakutsanangura tambo tsvuku.
01 of 07
White Sheathing
Jan Stromme / Getty Images Mutambo ane mhlophe sheathing dzimba 14-gauge wire. Iyi faira inoshandiswa 15-amp circuits mumba mako. Zvose zvinokonzera kutenderera dzinowanzoshandiswa zvikuru-14-gauge cable, kunyange zvazvo dzimba dzakawanda dziri ikozvino kuisa mativi aya se 20-amp circuits.
02 of 07
Yellow Sheathing
Girazi-coded kabheji sheathing inowedzera 12-gauge wire, iyo yakarongerwa 20-amp circuits. Simba guru rekutengesa uye midziyo ndiyo inoshandiswa zvikuru yekambani iyi 12-gauge.
03 of 07
Orange Sheathing
Tsvina ye-orange-shared sheathing inogadzirirwa kurutivi rwetambo-10. Inokwanisa kubata 30-amp miviri yekutakura. Zvinhu izvi zvinosanganisira air conditioner, mvura inopisa inopa zvokudya, uye chero ipi zvayo zvinotakura 30-amp.
04 of 07
Black Black Sheathing
Black-sheathed cable inoshandiswa kune dzose-6- uye 8-gauge wire. 8-gauge waya inotaridzirwa 45-amp circuits, nepo 6-gauge wire inokwanisa kubata 60-amp circuits. Tsvina ye-6 yejiyo iri nani pakudyisa sub panel, maruva emagetsi, kana hove mbiri, zvichienderana nehuwandu hwemhando dzakarongwa pamushandisi.
Kana uchida mutambo werima, iva nechokwadi chokuti uverenge sheathing uye pakanyatsofungisisa kuti uone kana uri kutenga tambo 6-kana 8-gauge.
05 of 07
Grey Sheathing
Grey-colored sheathing inoshandiswa kureva kabheji inotarisirwa kuiswa pasi pevhu. Inonyatsopindira kumvura uye inogonawo kuenzaniswa nekudzivirira mafuta uye chiedza chezuva. Muchikanda ichi, vatungamiri vanobatanidzwa muvinyl yakasimba panzvimbo pokusununguka mukati mejacket.
Nemhaka yokuti coding grey haina kuratidza tambo yekukura, verenga kuvhara uye jacket kudhinda kuti uve nechokwadi chokuti uri kutenga tambo yakarurama yefoni.
06 of 07
Outer Jacket Labeling
Nezvose zvisingatauri zvakashambadza kabhadhi, jacket yekunze yakanyorwa mazita anoratidza kuti vangani masimbi akavharwa akavanzwa mukati mehaati. Iyi tsero yenhamba haina, zvisinei, inosanganisira tambo isina kushandiswa iyo inoshandiswa sefree pasi. Semuenzaniso, kana kambani inotora 12-2 WG, zvinoreva kuti pane maviri akaiswa 12-gauge waya (a black uye white white wire), pamwe netambo yevhu. Kana iyo yakanyorwa ichiti 12-3, iyi inodzidzisa vatatu, 12-gauge kabha ine tsvina isina tsvina yemhepo yakabatanidzwa.
07 of 07
Ratidza Coding kune Mumwe Nomudzidzisi
Nzira dzomukati mukati mekambani dzakashambadza dzichavawo nekushambadzira kweplastiki iyo yakaiswa-coded kuti ionekwe nyore. Zese dzose dzichava netambo yakachena yakasungwa uye tsvina yakasviba yakasviba; izvi zvinoratidza kusapindira uye mahwindo anopisa, maererano.
Mucheka usina ruvara rwemhangura mucheka ndiyo foni yevhu. (Muzviitiko zvisingawanzoitiki, unogona kuwana kambani iyo iyo firi yevhu yakafukidzirwa nechisvibirira chemavara-ruvara rwuri ruvara rwakagadzirirwa mafaira epasi.)
Mune tambo yetatu nhatu, pachava nehuta tsvuku pamwe nechepachena uye nenyasi dzese. Tsvuku inosarudzwawo sehuni hunopisa.