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Electrical calculation

Motor cable sizing
& voltage drop

Calculate three-phase pump-motor current and identify a preliminary cable size from verified manufacturer data, including running and starting voltage drop.

Registration required for results

Verified manufacturer reference.Aberdare Bells & Mains Edition 2 is the current official file linked by Aberdare and was verified on 13 September 2026. Project correction factors and limits remain user-defined.

01 / Project inputs

Define the motor feeder

Your details

Required so Metsiworx can retain the calculation record and contact you if an engineering concern is identified.

Project

Motor operating data

Cable reference and installation

Correction factors and limits Required project criteria

Enter correction factors from the adopted cable-sizing basis. This screening does not include protective-device coordination, earth-fault loop impedance, adiabatic short-circuit withstand or harmonics.

Calculation basis

Current capacity and voltage drop
checked separately

01

Motor current

Rated output is converted to three-phase input current using entered efficiency, voltage and power factor.

02

Derated ampacity

The selected manufacturer rating is adjusted by every entered installation factor and the number of parallel runs.

03

Voltage drop

The manufacturer mV/A/m value is applied to running and starting current; the minimum passing catalogue size is identified.