CALCULATE → REFERENCE → SELECT → RECALCULATE → VERIFY → SAVE
Motor Cable Preliminary Sizing
Connect motor-current estimation to voltage-drop-based conductor sizing and an actual selected cable area. Installation, protection and ampacity checks remain separate.
What you need: motor rated shaft power, supply voltage, phase system, running power factor, motor efficiency, one-way cable length, conductor material, conductor operating temperature, allowable voltage drop.
What you get: a calculated requirement, compatible sourced options, the consequences of your actual component selection and a preliminary Job Card.
Voltage-drop-based sizing only. Ampacity is not verified: installation method, insulation, ambient/grouping derating, protection, starting and adopted electrical code require additional information.
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Project inputs
Defaults are editable planning examples. Confirm your actual values; changing units preserves the physical quantity.
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Conductor temperature, not ambient temperature.
Your numerical criterion; not a code-compliance limit.
Calculated locally. Shared values feed downstream steps automatically. Inputs enter browser storage only when you choose Save Job.
Calculate requirement
CompletedCurrent transferred automatically to the existing voltage-drop size solver. No repeated entry.
- Calculated running current
- 10.377 A
- Calculated minimum metal area
- 0.775 mm²
- Electrical input power
- 6.111 kW
Calculation method
Existing Motor Current and Voltage Drop engines; I=Pshaft/(phase factor×V×PF×η). Resistive voltage-drop criterion only.
Look up a real family
Not startedChoose the actual known family; a calculated size does not identify its material/profile.
Select component
Not startedComplete the required upstream step; no previous result is retained.
Recalculate & verify
Not startedComplete the required upstream step; no previous result is retained.
ENGINEERING SUMMARY
Complete the valid calculation steps
No verified component selected yet.
Voltage-drop-based sizing only. Ampacity is not verified: installation method, insulation, ambient/grouping derating, protection, starting and adopted electrical code require additional information.
A numerical voltage-drop criterion does not establish complete cable suitability or NEC/IEC/local-code compliance.
Existing tools and reference context
These Jobs reuse validated ValiCalc models. Use the standalone tools for a separate calculation; the Job carries shared values automatically within this page.
- motor current
- voltage drop
- cable resistance
- motor current estimate reference
- single three phase power reference
- awg wire size chart
- metric cable size chart
- wire resistance chart
Assumptions and verification limits
Steady running load; rated power is shaft output. Efficiency and PF are supplied estimates.
The existing resistive voltage-drop model omits reactance, motor starting current and detailed AC phase-angle effects.
Voltage-drop-based sizing only. Ampacity is not verified: installation method, insulation, ambient/grouping derating, protection, starting and adopted electrical code require additional information.
A numerical voltage-drop criterion does not establish complete cable suitability or NEC/IEC/local-code compliance.
Saved Jobs live only in your browser. Reopening recalculates from inputs; clearing browser data deletes them. No private engineering input is added to the public URL. Copy/share explicitly includes the displayed Job Card.