Kalkulator Jatuh Voltan
Calculate voltage drop, wire size, maximum current, and wire length for DC, single-phase, and three-phase circuits.
Your Input
Select a calculation type, enter your circuit parameters, then click Calculate to see voltage drop, wire size, max current, or max length with step-by-step solution.
Penyelesaian Langkah demi Langkah
Panduan Pengguna Lengkap
Apakah Penurunan Voltan?
Voltage drop is the reduction in voltage in an electrical circuit due to the resistance of the conductors. It's important to keep voltage drop within acceptable limits to ensure proper equipment operation. The NEC recommends no more than 3% for branch circuits and 5% for combined feeder and branch circuits.
Key Formulas
DC: VD = I × R × 2
AC Fasa Tunggal: VD = I × R × 2 × PF
AC Tiga Fasa: VD = I × R × √3 × PF
Rintangan: R = (ρ × L) / A
4 Calculation Types
Penurunan Voltan
Calculate voltage loss in a circuit from current, wire size, and length.
Wire Size
Cari saiz wayar AWG minimum untuk penurunan voltan maksimum sasaran.
Arus Maksimum
Calculate the maximum current you can draw within a voltage drop limit.
Maximum Length
Kira panjang larian wayar maksimum dalam had penurunan voltan.
Cara Penggunaan
- Select a calculation type (Voltage Drop, Wire Size, Max Current, or Max Length).
- Masukkan parameter litar: voltan, arus, panjang wayar, saiz wayar dan bahan.
- Pilih jenis litar (DC, AC Fasa Tunggal atau AC Tiga Fasa).
- Click Calculate to get results with step-by-step NEC-compliant solutions.
Bahan Kawat
Tembaga: Rintangan yang lebih rendah (12.9 Ω-cmil/kaki), kos yang lebih tinggi — standard untuk pendawaian kediaman.
aluminium: Rintangan yang lebih tinggi (21.2 Ω-cmil/kaki), kos yang lebih rendah — biasa dalam larian pengumpan besar.
Nota Penting
- NEC mengesyorkan ≤ 3% penurunan untuk litar cawangan, ≤ 5% jumlah.
- Voltage drop increases with wire length and current.
- Larger wire sizes (lower AWG number) reduce voltage drop.
- Always follow local electrical codes and consider temperature derating.