VFD Cable Sizing Calculator
VFD Cable Sizing Calculator – Find Correct Cable Cross-Section for Your Inverter Drive
Use our free VFD Cable Size Calculator to determine the correct cable cross-sectional area (mm²) for your motor and drive setup. Simply enter the motor power, supply voltage, cable length, and installation type to calculate the estimated full load current, voltage drop, and recommended cable size.
Why Use This Cable Sizing Tool?
Incorrect cable sizing for variable frequency drives (VFDs) can lead to overheating, excessive voltage drop, nuisance tripping, or even equipment failure. Our calculator ensures you choose the right cable size based on industry-standard formulas, with support for common cable types like PVC, XLPE, SWA, and SY.
How to Use the Calculator
- 🛠️ Enter your motor power in kilowatts (kW)
- 🔌 Select your supply voltage (230V, 400V, or 690V)
- ⚙️ Choose phase type: single-phase or three-phase
- 📏 Enter your one-way cable length in metres
- 🔧 Select the cable insulation type (PVC, XLPE, SWA, or SY)
- 📉 Click Calculate to view your results instantly
You’ll get a real-time estimate of the full load current, voltage drop, and minimum recommended cable size for your inverter drive installation.
Need Help Choosing the Right Drive Cable?
We stock a full range of VFD-compatible control and power cables — available in cut-to-length options, next-day delivery, and up to 50% off trade prices.
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Tip: Bookmark this page or share it with your engineering team — it’s ideal for installers, panel builders, OEMs, and consultants working with ABB, Allen Bradley, Danfoss, Delta, Siemens, and other drives.
Drive Outlet Megastore is the UK’s #1 source for discount inverter drives, soft starters, PLCs, HMIs, sensors and accessories. We provide technical tools like this to help you choose the right products faster — backed by real engineers, fast delivery, and unbeatable pricing.
