Ngati nyumba yanu inamangidwa zaka makumi asanu kapena zisanu zapitazo, mwayi uli wodzaza ndi chingwe chosasunthika. Ndicho chinthu chabwino. Wopanda zitsulo ankawombera chingwe, wotchedwanso NM cable kapena Romex , pambuyo pa dzina lodziŵika bwino, ndi makina osinthika a magetsi okhala ndi pulasitiki kunja. Ndiwo mkanda wosalumikizidwa. Mkati mwa chimake muli mawaya awiri kapena angapo osakanikirana ndipo kawirikawiri amagwiritsa ntchito waya. Izi ndizo chitetezo.
NM chingwe chabwino kwa inu chifukwa ndi zotetezeka kusiyana ndi mitundu yakale ya chingwe ndi wiring. Ndi zabwino kwa magetsi chifukwa ndi zotsika mtengo komanso zosavuta kugwira nawo ntchito. Pali mitundu yosiyanasiyana ya chingwe cha NM cha ntchito zosiyanasiyana.
NM Cable Anatomy
Mkati mwa NM chingwe ndi mawaya atatu kapena ambiri. Ngati chingwecho ndi "chingwe cha waya", chimakhala ndi mawaya awiri osakanikirana - imodzi yakuda ndi yoyera - ndipo imodzi imakhala ndi waya waya. Chingwe cha waya atatu chili ndi waya wakuda, wofiira, ndi wofiira komanso waya wofiira. Ngakhale kuti nthaka siidatchulidwe, ili ndi ntchito yofunika: imapereka njira yabwino yopezera magetsi ngati chinachake chikulakwika ndi dera. Chinachake ngati waya wonyansa, cholakwika mu chida cha mphamvu kapena chogwiritsira ntchito, kapena ngakhale kuyendetsa mu magetsi. Zonsezi zimawongolera pakhomo lamtundu waukulu wa nyumba (bokosi losweka) ndipo potsirizira pake padziko lapansi, kumene magetsi osokonekera amachotsedwa.
Zipangizo zamakono zili zitakulungidwa mu pulogalamu yabwino ya thermoplastic sheathing yomwe si yopanda chidziwitso komanso yopanda kutentha. Khwima ya NM yapamwamba imakhalanso ndi mapepala mkati mwake. Pali zikhulupiriro zosiyana pa zomwe mapepala amachita, koma malingaliro amodzi ndi omwe amachititsa kuti mawaya asamamangidwe, zomwe zimapangitsa kuti zikhale zosavuta kuzigwedeza.
Mzere wa NM wa Standard
Chingwe cha NM cha ntchito zamkati ndi chingwe cha NM-B. Ichi ndi chingwe choyera, chachikasu, kapena chachilanje (ndipo nthawi zina chakuda) mungathe kuchiwona kupyolera mwa kukhazikitsa malo osungirako kapena malo osungirako. Apo ayi, zabisika kumbuyo kwa zowuma kapena zinthu zina. Pezani chingwe cha NM-B ndi malo owuma okha, kotero musamaziwone kapena kuzigwiritsa ntchito panja kapena kulikonse komwe kungakhale konyowa.
Underground Feeder Chingwe
Pogwiritsa ntchito pansi pamtunda , kapena mtundu wa UF-B, chingwe ndi mtundu wa chingwe cha NM chomwe chili choyenera-inu mumaganizira-kuseri pansi. Mutha kuika m'manda. Ndi zosagonjetsa chinyontho, zosagwira kutentha, komanso zosapanganika. Inde, zosamalidwa ndi bowa. Mukufunikira zimenezo pamene mukukhala pansi. UF chingwe amagwiritsidwa ntchito popereka magetsi kuti asunge magalasi, magetsi, nyali, ndi zinthu zina zakunja. Kawirikawiri imakhala ndi malaya akunja koma imakhalanso yoyera.
Kulowera Utumiki Cable
Zingwe zazikulu, zakuda zomwe zimapanga waya wochuluka kwa agologolo pamwamba pa nsana yanu ndi mtundu wina wa NM chingwe. Pezani SE chingwe ntchito yogwiritsira ntchito pamwambaground, pamene mtundu wa USE umagwiritsidwa ntchito pa waya wothandizira pansi pa nthaka (ndikuyembekeza, simukuwawona iwo chifukwa mwina amatanthauza kuti mukukumba kumbuyo kwanu ndipo simunatsatire lamulo la kuyitana musanayambe kukumba ).