// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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eng.cable-voltage-drop Calculator
Calculates cable voltage drop from line resistance, load current, and power factor for single-phase and three-phase circuits. The voltage at the end of a long cable feeder determines whether motors and equipment can start and operate correctly.
Inputs
I A
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
L M
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
R Ohm Per Km
Opposition to current flow (Ω). V = IR. Resistors in series add; in parallel their reciprocals add.
Pf
A multiplier applied in the calculation.
V Nom
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
Results
voltage drop ΔV (V)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
voltage drop (%)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
voltage at load end (V)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.