100 Amp Wire Size Calculator
Free calculate the correct awg wire gauge for 100 amp electrical circuits based on voltage, distance, and voltage drop requirements.
Circuit Parameters
Results
Enter circuit parameters to calculate wire size
Wire Size Calculation Guide
Common AWG Sizes for 100 Amp
- • AWG 3: 85-100 amps (up to 50 ft)
- • AWG 2: 95-115 amps (50-100 ft)
- • AWG 1: 110-130 amps (100-150 ft)
- • AWG 1/0: 125-150 amps (150+ ft)
Important Notes
- • Voltage drop should be ≤ 3% for branch circuits
- • Copper has lower resistance than aluminum
- • Consider ambient temperature derating
- • Always consult local electrical codes