Wire Size Calculator.

Wire size depends on amperage, distance, and material. Use the calculator above — it factors in all three and includes voltage drop.

For 50A with copper: 6 AWG (rated 55A). For aluminum: 4 AWG (rated 55A). Longer distances may require upsizing.

48A charger: 6 AWG copper. 32A: 8 AWG copper. 16A: 12 AWG copper. Check local codes — some require upsizing by one gauge.

Longer runs increase voltage drop. The calculator automatically upsizes wire when the voltage drop exceeds 3%.

Voltage drop is the reduction in voltage due to wire resistance. NEC recommends under 3% for branch circuits. Shown in the calculator results.

Copper has better conductivity (smaller gauge needed). Aluminum is lighter and cheaper but requires larger gauge. Compare both in the calculator.

Enter amperage, distance, and material in the calculator. It instantly shows the recommended AWG with voltage drop.

Ampacity is based on gauge, material, and insulation rating per NEC Table 310.16. The reference table above shows standard 75°C ratings.

No — undersized wire overheats, causing insulation damage and fire risk. Always match wire to the breaker and load requirements.

48A: 6 AWG copper. 32A: 8 AWG copper. 16A: 12 AWG copper. Always check local codes before installation.