Wire Size for 100 Amp 200 Feet (120V)
| Standard | Wire Size | Ampacity | Volt Drop | Drop % |
|---|
| NEC (US) | AWG 3/0 (85 mm²) | 200 A | 3.01 V | 2.51% |
| IEC (EU) | 95 mm² | 223 A | 2.69 V | 2.24% |
| BS (UK) | 50 mm² | 144 A | 5.11 V | 4.26% |
| AS/NZS | 50 mm² | 144 A | 5.11 V | 4.26% |
About AWG 3/0
- Typical use
- 165–200 A service entrance — standard 200 A residential service
- Max breaker
- 200 A
- Temperature rating
- 75 °C
- NEC reference
- NEC Table 310.16
Always verify local code requirements. Wire sizing depends on insulation type, ambient temperature, and conduit fill.
Adjacent Current Comparison
| Current | AWG | mm² | Ampacity | Drop % |
|---|
| 60 A | AWG 1/0 | 53.5 mm² | 150 A | 2.39% |
| 100 A | AWG 3/0 | 85 mm² | 200 A | 2.51% |
| 150 A | AWG 4/0 | 107.2 mm² | 230 A | 2.98% |
Adjacent Distance Comparison
| Distance | AWG | mm² | Ampacity | Drop % |
|---|
| 150 ft | AWG 1/0 | 53.5 mm² | 150 A | 2.99% |
| 200 ft | AWG 3/0 | 85 mm² | 200 A | 2.51% |
| 300 ft | AWG 4/0 | 107.2 mm² | 230 A | 2.98% |