Get a Free Cable Sizing Calculator — Built for Electrical Engineers Who Need a Fast, Reliable LV Cable Check

What the Free Version Includes

Feature list:

• LV copper cable sizing — single-phase and three-phase circuits up to 400V.
• Current-carrying capacity check — based on SANS 10142 standard cable tables.
• Basic voltage drop calculation — flags circuits that exceed the 5% voltage drop limit.
• Single installation method — cables in conduit or on cable tray (standard conditions).
• Pass/fail indicator — green or red result cell so you know immediately if the cable size is acceptable.
• No macros, no add-ins — works in Excel 2016 and later, including Excel for Mac.

Who Is This For

• You are an electrical engineer or technician sizing LV cables for standard domestic, commercial, or light industrial installations.
• You want a fast sanity check on a cable size before committing to a design.
• You are a student or graduate engineer learning cable sizing methodology and want a practical tool to practice with.
• You need a quick result and do not need a full compliant calculation report for client submission.

What the Lite tool is NOT for:

• Projects requiring voltage drop under motor starting conditions — use Cable Sizing Calculator v1.1.
• Cables in environments with multiple derating factors (high ambient temperature, grouped cables, direct burial) — use Cable Sizing Calculator v1.1.
• Calculation reports for client submission or engineering sign-off — use Cable Sizing Calculator v1.1.

→ Need motor starting calculations, short-circuit withstand, and all 6 derating factors?
  Upgrade to Cable Sizing Calculator v1.1

→ Want to understand every calculation from first principles with worked examples?
  Enrol in the Practical Cable Sizing Masterclass