Wire Size for 15 Amp 50 Feet (120V)
| Standard | Wire Size | Ampacity | Volt Drop | Drop % |
|---|
| NEC (US) | AWG 12 (3.31 mm²) | 25 A | 2.90 V | 2.41% |
| IEC (EU) | 4 mm² | 32 A | 2.40 V | 2.00% |
| BS (UK) | 2.5 mm² | 24 A | 3.83 V | 3.20% |
| AS/NZS | 2.5 mm² | 24 A | 3.83 V | 3.20% |
About AWG 12
- Typical use
- 20 A general-purpose circuits — kitchen countertop, bathroom, garage outlets
- Max breaker
- 20 A
- Temperature rating
- 60 °C
- NEC reference
- NEC 240.4(D)(2)
Always verify local code requirements. Wire sizing depends on insulation type, ambient temperature, and conduit fill.
Adjacent Current Comparison
| Current | AWG | mm² | Ampacity | Drop % |
|---|
| 15 A | AWG 12 | 3.31 mm² | 25 A | 2.41% |
| 20 A | AWG 10 | 5.26 mm² | 35 A | 2.02% |
Adjacent Distance Comparison
| Distance | AWG | mm² | Ampacity | Drop % |
|---|
| 25 ft | AWG 14 | 2.08 mm² | 20 A | 1.92% |
| 50 ft | AWG 12 | 3.31 mm² | 25 A | 2.41% |
| 75 ft | AWG 10 | 5.26 mm² | 35 A | 2.28% |