Calculadora de Caída de Voltaje Gratis
Calcula la caída de voltaje en cables eléctricos según la distancia, calibre y corriente del circuito.
A
ft
CM
V
Voltage Drop
4.96 V
Drop Percentage0.00 %
Voltage at Load115.0 V
Voltage Drop vs Current
Fórmula
## Voltage Drop Formula **Vdrop = 2 x K x I x D / CM** K is 10.8 for copper (12.9 for aluminum), I is current in amps, D is one-way distance, and CM is the wire cross-section in circular mils. The factor of 2 accounts for the round-trip path.
Ejemplo Resuelto
20A on 12 AWG (6,530 CM) copper over 75 ft at 120V.
- 01Vdrop = 2 x 10.8 x 20 x 75 / 6530 = 4.96V
- 02Percentage = 4.96 / 120 x 100 = 4.14%
- 03Voltage at load = 120 - 4.96 = 115.0V
- 04This exceeds 3%; consider upsizing to 10 AWG.
Preguntas Frecuentes
What are common wire circular mil values?
14 AWG = 4,110 CM, 12 AWG = 6,530 CM, 10 AWG = 10,380 CM, 8 AWG = 16,510 CM, 6 AWG = 26,240 CM.
What if I am using aluminum wire?
Replace K=10.8 with K=12.9 for aluminum conductors. Aluminum has higher resistance so you typically need larger wire sizes.
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