Tsvina yepasi pemuganhu wekugara kazhinji inowanikwa pasi pevhu (UF) cable, iyo inotaridzirwa kushandiswa kunze uye nekuvigwa zvakananga . Kuchengeta mitambo, kana kuti vatungamiri, yepasi pasi kambani haisi yakasiyana nekuenzanisa kune dzimwe nhepfenyuro dzemhuri uye inowanzoenderana nemutoro wose, kana kudiwa kwemagetsi, yezvigadziro zvepakati. Zvisinei, kana kambani inotora yakareba, sezvinoitwa pasi pedenga kakawanda, iwe unogona kuwedzera kuwedzerwa kwetambo kushandiswa kwekodha kwekudonha kwemhepo-kurasikirwa kwevhiri muudunhu.
Kunzwisisa Voltage Drop
Vose vanofambisa magetsi, kusanganisira foni, vanoita kuti vamwe vasawirirana nekuyerera kwemagetsi. Chimwe chiitiko chekurwisana uku, kunonziwo impedance, ndiko kurasikirwa kwemagetsi. Izvi zvinozivikanwa sehotera yevhiri uye inomiririrwa sepakati yemagetsi ose anowanikwa pamasimba emhepo yedunhu. Kana iwe uchitarisa magetsi epajeri pajeri rebasa (breaker box), unofanira kuwana kuverenga kwemavhiri zana makumi maviri (makumi maviri nehafu). Kana iwe ukatora imwe chiyero chebasa kune imwe nzvimbo yakanyanyisa kubva pane mapaneti uye uwane kuverenga 114 volts-musiyano wezvinyorwa 6-iyo dunhu ine 5% yezvokudonha gomba (5 muzana ye 120 = 6).
Kuwedzerwa kwemhepo kunodonha kunoreva kuti motokari, midziyo, uye mamwe majaira haasi kumhanyira nekukurumidza kana kubudirira sezvazvakagadzirirwa. Izvi zvinogona kutungamirira kuderedzwa kwebasa, kupfeka zvisina kufanira, uye kunyange kutadza kusati kwasvika kwemagetsi emagetsi.
Voltage inodonha zvakare inoparadza magetsi nokuti simba rinorasikirwa sehuni panzvimbo pane kushandiswa nemichina yedunhu.
Zvinokonzera Voltage Drop
Sezvo kuregera kwemhepo kunokonzerwa nekudzivisa kwevatungamiri, kunyanya vanofambisa, iwe unowedzera kuderera kwemhepo. Kana zvasvika pakutsvaga kwepasi pasi, iyo yakareba foni iyo inowedzera simba.
Waya mashizha chimwe chikonzero: Muduku-madhenari madhesi ane kushorwa kupfuura mafaira makuru. Mucheka wendarira unopikisa zvishoma kudarika aluminiyuta netambo, asi mikana iwe unenge uchishandisa mhangura pane chero. Mazuva ano, iyo chete yeruminium inoshandiswa mumapurogiramu akawanda emisha ekugara ari mumatambo ekupinda mashizha kubva kune zvishandiso. Asi iwe unogona kuona aluminium inoratidzika pamagetsi ekudonha mabheji.
Takura Matters
Voltage inoderera inowedzera sezvo mutoro uri mudunhu unowedzera, uye kuwedzeredza dunhu kunoita kuti kuwedzereka kwemhepo kuregere. Mune mamwe mazwi, kana iwe ukaisa zvinhu zvakawanda pane rimwe dunhu uye uchidarika huwandu huwandu huwandu huwandu hwemazana makumi mashanu (100%) hwakachengeteka (1,440 volts ye 15-amp circuits; 1,920 volts ye 20-amp circuits), iwe unowedzera kushaiwa kwemhepo inodonha. Mhinduro yacho iri nyore: Chengetedza mutoro wega wega mudunhu kusvika ku80 muzana kana pasi pehuwandu hwemagetsi. Ichi chiitiko chinofungidzirwa mune zvakawanda voltage drop calculations nematafura.
Kuchechedza Vatungamiri
I National Electrical Code (NEC) inokurudzira kudonha kwemhepo inokonzerwa ne3% pamitunhu yega yega, kana kuti mashepu ebazi . Ichi chinangwa chakanaka chokupfura kana uchiita vatungamiri vepasi pevhu. Izvi zvinotevera urefu hwakareba hwekambani iwe unogona uye unoramba uine 3 peresenti inokonzera doro, nekuda kweiyo yakagadzirwa nefesi (AWG) uye magetsi emharaunda.
Semuenzaniso, kune dunhu 120-volt, unogona kukwira kusvika pamakumbo makumi mashanu e14 AWG cables pasina kudarika 3 muzana kuwedzera kwekuwisira.
Kwemasvondo 120-volt:
- 14 AWG - 50 mamita
- 12 AWG - 60 mamita
- 10 AWG - 64 mamita
- 8 AWG - 76 mamita
- 6 AWG - 94 mamita
Kwemasvondo 240-volt:
- 14 AWG - 100 mamita
- 12 AWG - 120 mamita
- 10 AWG - 128 mamita
- 8 AWG - 152 mamita
- 6 AWG - 188 mamita