Data Center Electrical Calculator
Voltage Drop Calculator (LV Cable, Single & Three Phase)
Calculate LV cable voltage drop in volts and percent from current, length, conductor size, material and power factor, and check it against your allowed limit.
Design Inputs
Results
Voltage drop
6.55 V
Voltage drop %
1.58 %
Within the 3.0% limit.
Resistance R (Ω/km per conductor)0.3214
Reactance X (Ω/km, indicative)0.080
ΔV = k × I × L × (R·cos φ + X·sin φ), with k = √3 for three phase and 2 for single phase, L in km and I per cable. R uses the toolkit's operating-temperature resistivity (Cu 22.5, Al 36 Ω·mm²/km).
Indicative only. Use the manufacturer's R and X for the actual cable, and check ampacity and short-circuit withstand as well (see the Cable & Conductor Sizing Calculator). Voltage-drop limits depend on the applicable code and project specification.
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