Cable Sizing Calculator
Determine appropriate cable sizes based on load current, voltage drop limits, and installation conditions. Includes IEC derating factors for temperature, grouping, and installation methods.
Enter load parameters and click Calculate to see cable sizing results
Notes:
- Calculations based on IEC 60364 / BS 7671 standards
- Maximum voltage drop typically 3% for final circuits, 5% total
- XLPE insulation allows higher operating temperature
- Always verify with local electrical codes and regulations
- Consider future load growth when selecting cable sizes
DISCLAIMER
This calculator provides ESTIMATES for preliminary planning purposes. Results are based on standard assumptions and may not reflect your specific project conditions.
By using this tool, you acknowledge that:
1. All calculations are approximate and based on typical industry standards and assumptions.
About This Calculator
The Cable Sizing Calculator helps electrical engineers and MEP contractors determine the correct cable cross-section for power distribution systems across the UAE and Gulf. Calculate required cable sizes based on load current, voltage drop limits, cable length, and installation conditions. Applies IEC/BS derating factors for ambient temperature, cable grouping, and installation methods commonly used in Gulf construction.
When to Use This Calculator
- Designing electrical distribution systems for buildings
- Sizing main feeders and sub-main cables
- Checking voltage drop compliance for long cable runs
- Applying derating factors for Gulf climate conditions
- Verifying cable specifications for tender submissions
How to Use This Calculator
Enter Load Details
Input load current (A), voltage (V), and power factor for the circuit.
Specify Cable Route
Enter cable length and select installation method (tray, conduit, direct burial, etc.).
Set Derating Factors
Apply factors for ambient temperature, cable grouping, and installation conditions.
Check Voltage Drop
Verify voltage drop is within acceptable limits (typically 3-5% for final circuits).
Review Cable Size
Get recommended cable cross-section (mm²) with current-carrying capacity verification.
Typical Scenarios in UAE & Gulf Projects
An MEP contractor needs to size the main feeder cable from transformer to main distribution board (150m run, 800A load). The calculator determines 3×300mm² cables per phase with voltage drop of 2.1%, meeting the 3% limit for main feeders.
A factory requires cable sizing for 45°C ambient temperature with cables in outdoor trenches. Derating factors reduce standard capacity by 25%, requiring upsizing from 95mm² to 150mm² for a 200A motor feeder.
Frequently Asked Questions
Take Your Calculations Further
This calculator reflects the logic built into Arkan's construction management platform.
Last Updated: January 2026
Standards Reference: Calculations based on IEC 60364 and BS 7671 (IET Wiring Regulations)