Jobsite Calculator
Voltage Drop
Voltage Drop Calculator
Estimate running voltage at the platform. Assumes SOOW (stranded copper) cords. For planning only—verify on site.
Results
Voltage Drop
— V
Voltage Drop %
— %
Actual Running Voltage
— V
—
Phase multiplier: —
Total resistance/ft: — Ω/ft
*1-phase uses 2 × I × R × L. 3-phase uses √3 × I × R × L. R is SOOW stranded copper resistance per foot for the selected AWG (≈20 °C). Actual drop may be higher due to warm cords, connections, or older cables.
Rule of thumb: keep voltage drop ≤ 5% for best hoist performance.