Lap dat 11 phut

Sut Ap Tren Day Noi Dai Cho Dung Cu Va Nguon Tam Thoi

Day noi dai thuong duoc chon theo thoi quen: co gi dung do. Vi the may cua 15A co the bi noi vao day 16 AWG dai 100 ft va gap sut ap gan 10%.

Trong moi truong NEC, can xem Article 400, NEC 400.5(A)(1), NEC 400.12, NEC 590 va muc tieu 3% / 5% trong NEC 210.19(A)(1) va 215.2(A)(1). Theo IEC, tai lieu huu ich la IEC 60364-5-52, IEC 60227 va IEC 60245.

Vi Sao Day Noi Dai Gay Van De Nhieu Hon Day Co Dinh

  • Thiet bi di dong thuong co dong khoi dong cao.
  • Day co the duoc dung khi con cuon, bi che hoac bi phoi nang.
  • He 120V rat nhay voi moi volt bi mat.
  • Nguon tam thoi cong don sut ap cua mach va cua day noi dai.

Diem Tieu Chuan Nen Kiem Tra

NEC 400.5(A)(1): dung bang day mem cho ban than day noi dai.

NEC 400.12: day mem khong thay the day lap dat co dinh.

NEC 590: nguon tam thoi van can day con tot va duoc bao ve.

IEC 60364-5-52 va IEC 60245 / 60227: kiem tra gioi han sut ap, loai day va moi truong su dung.

IEC and electrical wiring references are worth checking alongside site measurements because extension-cord failures are usually a mix of conductor resistance, heat buildup, and poor jobsite assumptions.

Huong Dan Nhanh Ngoai Hien Truong

Gia tri thuc te cho day dong. Luon kiem tra dong tren nhan may, phich cam, nhiet do va tai dong co.

Ung dungChieu Dai Mot ChieuTaiCo Bat Dau Tot
120V tool25 ft / 7.5 m15A16 AWG / 1.5 mm2
120V tool50 ft / 15 m15A14 AWG / 2.5 mm2
120V tool100 ft / 30 m15A12 AWG / 2.5 mm2
120V load100 ft / 30 m20A10 AWG / 4 mm2
230V tool30 m10A2.5 mm2

Vi Du Co So Co The Kiem Lai

May cua 120V, 15A, day 100 ft

Day dong 16 AWG gay sut ap khoang 12.0V tren duong di ve, tuong duong 10.0%. Day 12 AWG giam xuong khoang 4.8V, tuc 4.0%.

May rua ap luc 120V, 12A, day 50 ft

Voi 14 AWG, sut ap khoang 3.0V, tuong duong 2.5%. Neu mach cap nguon da ton that 2% den 3%, nen nang len 12 AWG.

May tron di dong 230V, 10A, day 30 m

Voi 1.5 mm2, sut ap khoang 7.3V hay 3.2%. Voi 2.5 mm2, giam con 4.5V hay 1.9%.

Danh Sach Kiem Tra Truoc Khi Do Loi Cho Dung Cu

  • Cong sut ap cua mach va day noi dai.
  • Tinh den dong khoi dong cua bom, may nen va may cua.
  • Dung day da thao ra hoan toan va co bao ve.
  • Chon vo day phu hop voi am uot, nang, dau va mai mon.
  • Neu ket qua gan 3%, hay tang len mot cap day.

Kiem Tra Day Noi Dai Truoc Khi Bi Goi Bao Hanh

Truoc khi chon cuon day hay mua day moi, nhap dong thuc te, dien ap, kich thuoc day va chieu dai mot chieu vao may tinh.

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