Voltage Drop Calculator

IFlexCable Technology Co., Ltd. specializes in the R&D, manufacturing and supply of power, control, flame retardant and photovoltaic cables for industrial, construction, grid and new energy customers.

IFlexCable Technology Co., Ltd.

Power cable, control cable, instrumentation cable, photovoltaic cable and custom industrial cable solutions.

Engineering Tool

Voltage Drop Calculator

Evaluate voltage drop for low-voltage circuits with realistic conductor resistance, power factor, single-phase / three-phase options and an automatic minimum CSA recommendation.

Single / Three PhaseCurrent or power based input

Cu / AlPVC or XLPE conductor resistance correction

Minimum CSAAutomatic recommendation to meet max drop

What this tool is for

Use it for engineering pre-checks, sales support and product guidance. Final design should still be verified against project standards, installation conditions and manufacturer data.

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Input Parameters

Voltage Drop Inputs

Set the circuit data, cable characteristics and allowable drop. The tool checks the selected CSA and recommends the minimum compliant size.

Load Data

System Type Input Mode Rated Voltage (V) Load Current (A) Load Power (kW) Power Factor Equipment Efficiency Circuit Type

Cable Data

Conductor Material Insulation Type Selected Cable Size Parallel Runs per Phase One-way Route Length (m) Maximum Allowable Drop (%) Operating Conductor Temperature (°C) Reactive Component X (Ω/km)

Result

Voltage Drop Summary

Review the selected cable size, the actual voltage drop and the minimum recommended CSA.

Comparison

Candidate CSA Comparison

Compare the selected size against the minimum CSA required to satisfy the allowable voltage drop.

Method

Calculation Trace

The calculator uses a resistance plus reactance method with conductor resistance corrected to operating temperature.