Menene girman waya na 30 amps 300 ƙafa?

Yin amfani da madaidaicin girman waya na lantarki don kewayawa yana da mahimmanci don hana haɗari da hana gobara. Wannan ya faru ne saboda gaskiyar cewa lokacin da ake watsa wutar lantarki ta hanyar nesa mai nisa ta hanyar wayoyi na jan karfe ko aluminum, raguwar wutar lantarki na iya faruwa. Don haka, don tabbatar da aminci, dole ne ku yi amfani da madaidaicin waya don sarkar ƙafarku 300.

Jira yayin da zan nuna muku wasu ƙididdiga kuma in koya muku abin da girman kebul ɗin za ku yi amfani da shi don shigarwa na gaba:

Waya nawa kuke buƙata don 30 amps? (80% NEC code)

Dole ne ku yi amfani da waya wanda zai iya ɗaukar akalla 37.5 amps. Don haka Wayar AWG # 8 wacce ke iya ɗaukar amps 50 ita ce mafi kyawun waya don wannan waya reshe.

Yawancin lokaci ina amfani da kalkuleta mai jujjuya wutar lantarki ko ka'idodin Lantarki na ƙasa (NEC) don ma'aunin waya 30 mai karɓa.

** Don kewayawar 30-amp, ba za ku iya amfani da waya ta lantarki 30A kawai ba.

Ba ma sai ka yi amfani da waya ta #10 AWG 35A ba. Wannan saboda matsakaicin nauyin kowane waya kewayen reshe shine kashi 80% na ƙimar da'irar yanzu na kowane kaya. (NEC 220-2)

Ribobi suna kiran shi NEC ƙarfin lantarki drop kalkuleta tare da 80% ikon ma'auni. Wannan yana nuna cewa waɗannan 30 amps yakamata su wakilci fiye da 80% na nauyin da aka ƙima na waya (wayar jan ƙarfe ko aluminum).

Anan ga yadda ake tantance adadin waya na abin da kuke buƙata don rukunin lantarki na 30 amp:

Yin la'akari da buƙatun 80% NEC, na yi imani cewa 35A #10 AWG bai isa ba. Yana da kusan babban isa tare da 35A, amma ba sosai ba.

Muna buƙatar kebul wanda zai iya ɗaukar aƙalla 37.5 amps don amfani da maɓallin amp 30. Girman da ke biye da waya ta #10 AWG (35A) shine girman waya ta #8 AWG (50A).

Don haka, madaidaicin girman waya don ƙwanƙwasa 30 amp shine waya ta AWG #8, wacce ke da ƙimar amps 50 a halin yanzu.

Menene girman waya don ƙaramin fakitin amp 30ft 300?

Kuna buƙatar waya wanda zai iya ɗaukar akalla 60 amps.

Don haka amfani da waya ta #6 AWG wacce zata iya ɗaukar 65A shine mafi kyawun waya a gare ku.

Zan koya muku yadda na lissafta shi a kasa.

Faɗin wutar lantarki yana faruwa lokacin da ake watsa wutar lantarki akan waya ta jan karfe 30 amp ko kuma waya ta aluminium amp 30 a nesa. Ana kiyaye juzu'in wutar lantarki a ƙasa da 3% a ƙasa da ƙafa 10, don haka ba lallai ne ku yi la'akari da shi ba. (1)

Misali, kuna buƙatar yin lissafin faɗuwar wutar lantarki a 50, 100, 200, ko 300 ƙafa. Bugu da ƙari, kuna daidaitawa da wannan ta hanyar ƙara ƙarfin halin yanzu. Amma nawa?

Dangane da NEC 310-16, halin yanzu dole ne a ƙara da kashi 20 cikin 100 na kowane ƙafa 30 daga XNUMX amp na kayan haɗi.

A taƙaice, wannan yana nufin dole ne ku:

• Ƙara halin yanzu da 10% don 30 amp waya mai nisan ƙafa 50 daga ɓangaren kayan haɗi.
• Ƙara amperage da 20% don igiyoyin ma'aunin amp 30 ƙafa 100 daga ƙaramin panel.
• Ƙara halin yanzu da 40% don 30 amp waya mai nisan ƙafa 200 daga ɓangaren kayan haɗi.
• A ƙarshe, ƙara amperage da 60% don 30 amp waya mai nisan ƙafa 300 daga ɓangaren kayan haɗi.

Mai zuwa yana nuna yadda ake tantance ƙarfin 30 amps daga nesa:

Bari mu ce kuna buƙatar ƙaramin kwamiti mai nisan ƙafa 300 daga ma'aunin wutar lantarki 30 amp.

Mun riga mun san cewa ana buƙatar mafi ƙarancin 0 amps na halin yanzu a ƙafa 37.5. Don ayyana ƙarin ƙafa 300 daga rukunin kayan haɗi, dole ne ku ƙara na yanzu da 20% na kowane ƙafa 100 na nisa. Don haka dole ne ku ƙara amperage da 60% don samun isasshen ƙafa 300 na kewayen ku.

Saboda haka, kana buƙatar layin da zai iya ɗaukar akalla 60 amps don da'irar amp 30 a ƙafa 300. Abin takaici, #8 AWG waya halin yanzu 50A ne kawai.

A cikin wannan halin, zaɓi # 6 AWG waya tare da 65A.

Dubi wasu labaran mu a kasa.

• Menene girman waya don 30 amps 200 ƙafa
• Menene girman waya don 150 amps?
• Inda za a sami waya mai kauri mai kauri don tarkace

shawarwari

(1) wutar lantarki - https://www.eia.gov/energyexplained/electricity/

(2) jan karfe - https://www.livescience.com/29377-copper.html