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Amp Wire Gauge Calculator
Determine the appropriate wire size for your electrical circuits. Calculate wire gauge requirements based on current, voltage, distance, and temperature factors.
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Amp Wire Gauge Calculator
System Design
Determine the appropriate wire size for your electrical circuits. Calculate wire gauge requirements based on current, voltage, distance, and temperature factors.
This calculator is based on industry-standard formulas and has been verified by our team of solar engineers.
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How to Use:
- Enter the current in amperes (A) your circuit will carry
- Enter the circuit voltage (V)
- Enter the one-way length of the wire in feet
- Set the maximum acceptable voltage drop percentage (typically 3-5%)
- Click 'Calculate' to see the recommended wire gauge
Notes:
- This calculator uses proper voltage drop calculations based on wire resistance
- Calculations are based on copper wire at 75°C temperature rating
- For critical applications, consult with a licensed electrician
- Consider derating factors for high ambient temperatures or multiple conductors in a raceway
- Always follow local electrical codes and regulations
Common Applications:
- 14 AWG: Lighting circuits, 15A circuits
- 12 AWG: General household outlets, 20A circuits
- 10 AWG: Large appliances, water heaters
- 8 AWG and larger: Service panels, subpanels, large appliances
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