A detached garage sub-panel typically uses a 60A feeder, which handles most workshop needs including lighting, outlets, and one large appliance.
| Recommended wire | 6/3 with ground or 6 AWG THHN in conduit |
| Breaker | 60A double-pole |
| Voltage | 240V |
| Typical amperage | 40A |
| Circuit amperage | 60A |
| NEC reference | NEC 225 |
| Max recommended distance | 100 feet (without voltage drop concerns) |
For 100A sub-panels (heavy workshop use), upgrade to 4 AWG copper or 2 AWG aluminum. Distance is critical — long runs may need upsizing for voltage drop.