⚡ Wire Gauge Calculator

Professional wire sizing calculator for electrical installations with NEC/IEC compliance checks and safety recommendations.

⚠️
Important Safety Notice: This tool is for educational purposes only. Always consult a licensed electrician and follow local electrical codes (NEC, IEC, etc.).

⚡ Circuit Parameters

Amps
Common: 15A (lights) · 20A (outlets) · 30A (dryer)
From source to load (one-way distance)

🔧 Wire Specifications

Copper: Better conductivity · Aluminum: Lighter/cheaper
3% 1% - 10%
NEC: ≤3% branch, ≤5% total · IEC: ≤4%

🌡️ Environmental Factors

°C
Standard: 30°C · Hot: 40°C+ requires derating
More conductors = more heat = derating required
Common Circuit Presets:
📏
Minimum Wire Size
–
– mm²
📉
Voltage Drop
–
–
💡
Power Loss
–
– kWh/year
📏
Max Length
–
feet

📊 Calculation Details

⚡
No Calculation Results
Enter parameters and click Calculate

⚠️ Safety Warnings

✅ Recommendations

📈 Wire Size Comparison