العلوم
Voltage Drop Calculator
Calculate the voltage drop in an electrical circuit based on wire size, material, and length.
كيفية الاستخدام
- Select the Wire Material (Copper or Aluminum).
- Choose the Wire Size in AWG or kcmil.
- Enter the Source Voltage and phase (Single or Three Phase).
- Enter the expected Load Current in Amps and the one-way Distance.
- The calculator determines the voltage lost over the run. The National Electrical Code (NEC) recommends a maximum voltage drop of 3% for branch circuits.
الصيغة
Voltage Drop Formula:
VD = (2 × K × I × L) / CM (for Single Phase)
VD = (1.732 × K × I × L) / CM (for Three Phase)
Where:
K = Direct Current Constant (12.9 for Copper, 21.2 for Aluminum)
I = Load Current (Amps)
L = One-way wire length (Feet)
CM = Circular mils (Wire cross-sectional area)
VD = (2 × K × I × L) / CM (for Single Phase)
VD = (1.732 × K × I × L) / CM (for Three Phase)
Where:
K = Direct Current Constant (12.9 for Copper, 21.2 for Aluminum)
I = Load Current (Amps)
L = One-way wire length (Feet)
CM = Circular mils (Wire cross-sectional area)
The Voltage Drop Calculator is essential for electricians and engineers planning long wire runs. By analyzing wire gauge, material resistivity, and load, it ensures compliance with NEC standards and prevents equipment damage from undervoltage.