Electrical Wire Voltage Drop & Copper Cable Sizing Calculator
Calculate electrical voltage drop (ΔV in Volts & %), copper conductor resistance (Ohms), and power dissipation (Watts) to size cables compliant with NEC and IEC standards.
Calculator Inputs
Live Real-TimeVoltage Drop Percentage (%)
Voltage Drop (ΔV in Volts)
7.84 V
Delivered Voltage at Load (V)
222.16 V
Cable Power Loss (Watts)
125.44 W
Conductor Loop Resistance
0.49 Ω
Voltage Delivery Profile
Detailed Calculation Breakdown
Calculation Methodology
Copper Loop Resistance: R = 2 * (ρ * L) / A, where ρ = 0.0175 Ω·mm²/m. Voltage Drop: ΔV = I * R. Percentage Drop = (ΔV / V_supply) * 100. Power Loss: P = I^2 * R.
Important Legal & Educational Disclaimer
This electrical engineering tool computes single-phase AC/DC conductor voltage drops.
This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.
Frequently Asked Questions
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