WireSizing
Wire gauge reference & calculator

What Wire Size for 15 Amps?

Copper Wire
14 AWG
1.6277 mm · 2.0809 mm²
Aluminum Wire
12 AWG
2.0525 mm · 3.3088 mm²
Breaker: 15A · Based on NEC Table 310.16 (75°C insulation)

Common Uses for 15A Circuits

Standard lighting and outlet circuits

14 AWG Copper — Key Specs

Diameter1.6277 mm (0.064084")
Area2.0809 mm²
Resistance at 20°C8.2848 Ω/km
Weight18.645 kg/km
Ampacity (75°C)15 A

Important: For long wire runs, you may need to upsize the wire to compensate for voltage drop. NEC recommends keeping voltage drop under 3% for branch circuits. Use our voltage drop calculator to check.

Related

14 AWG full specifications → Full AWG chart → Wire size calculator → Ampacity tables →