Cara Menghitung Wire Sizing
learn.whatIsHeading
Wire sizing selects conductor diameter to limit voltage drop and prevent overheating. Code requires ampacity matching and voltage drop limits.
Rumus
Calculate voltage drop: VD = (2×K×I×L) / (1000×A) for DC or single-phase
- VD
- (2×K×I×L) / (1000×A) for DC or single-phase — (2×K×I×L) / (1000×A) for DC or single-phase
- K
- K value — Variable used in the calculation
- I
- I value — Variable used in the calculation
- L
- L value — Variable used in the calculation
- A
- A value — Variable used in the calculation
- DC
- DC value — Variable used in the calculation
Panduan Langkah demi Langkah
- 1Look up ampacity from tables at operating temperature
- 2Calculate voltage drop: VD = (2×K×I×L) / (1000×A) for DC or single-phase
- 3Select wire where VD <3% feeder, <5% combined
Contoh Terpecahkan
Masukan
I = 100 A, L = 50 m, copper wire, assume 60°C ampacity table
Hasil
AWG 6 (106 A) with ~3.1% drop, marginal
AWG 4 better choice
Kesalahan Umum yang Harus Dihindari
- ✕Using listed ampacity without derating for temperature or bundling
- ✕Neglecting voltage drop in long feeder runs
Pertanyaan yang sering diajukan
Why limit voltage drop?
Excessive drop reduces equipment performance, efficiency, and motor starting capability.
How does temperature affect wire sizing?
Higher temperature reduces ampacity; must derate if ambient >30°C.
Siap menghitung? Coba Kalkulator Wire Sizing gratis
Cobalah sendiri →