14 AWG Wire: Ampacity, Uses & Specs | PES Supply
14 AWG Wire — Ampacity, Uses & Specifications
14 AWG copper wire is rated for 15-20 amps. Common uses include general lighting circuits, residential outlets, and low-voltage applications. Available in THHN, THWN, Romex (NM-B), and MC cable varieties.
14 AWG Wire Specifications
| Specification | Value |
|---|---|
| AWG Size | 14 |
| Ampacity (60°C / 140°F) | 15A |
| Ampacity (75°C / 167°F) | 20A |
| Resistance (Ω/1000 ft, Copper) | 2.525 |
| Wire Types Available | THHN, THWN-2, XHHW-2, USE-2, PV Wire, NM-B (Romex), MC Cable |
| Typical Breaker Size | 15A (60°C) or 20A (75°C) |
Common Applications
14 AWG copper wire is rated for 15-20 amps. Common uses include general lighting circuits, residential outlets, and low-voltage applications. Available in THHN, THWN, Romex (NM-B), and MC cable varieties.
Voltage Drop Reference (14 AWG Copper, 240V)
| Distance (ft) | VD @ 20A | % Drop | Status |
|---|---|---|---|
| 25 ft | 2.52V | 1.1% | Good |
| 50 ft | 5.05V | 2.1% | Good |
| 100 ft | 10.10V | 4.2% | Warning |
| 150 ft | 15.15V | 6.3% | Upsize |
| 200 ft | 20.20V | 8.4% | Upsize |
Compatible Breakers and Outlets
For 14 AWG wire at 75°C rating (20A), use a 20A double-pole breaker (240V circuits) or 15A single-pole breaker (120V circuits at 60°C rating).
Related Wire Types
- THHN/THWN-2: For conduit runs, rated 90°C dry / 75°C wet
- NM-B (Romex): For indoor residential wiring, rated 60°C
- MC Cable: Metal-clad, for commercial and exposed runs
- USE-2 / PV Wire: For solar and direct burial, rated 90°C
- XHHW-2: For wet/dry locations, rated 90°C