14 AWG Wire Ampacity

The standard wire size for 15-amp lighting circuits in residential electrical systems.

14 AWG Quick Specifications

20A
Copper Ampacity
15A
Aluminum Ampacity
2.08
mm² Area
1.628
mm Diameter

Complete 14 AWG Specifications

Wire Gauge 14 AWG
Diameter (inches) 0.0641 in
Diameter (mm) 1.628 mm
Cross-sectional Area 2.08 mm² (4,107 circular mils)
Copper Resistance 8.286 Ω/1000ft (27.18 Ω/km) @ 20°C
Copper Ampacity (60°C) 15A
Copper Ampacity (75°C) 20A
Copper Ampacity (90°C) 25A
Max Circuit Breaker 15A (per NEC)

Common Applications for 14 AWG Wire

Lighting Circuits

Standard 15A lighting circuits throughout the home. Most common residential wire size for general lighting.

General Outlets

15A outlets in bedrooms, living rooms, and other general-purpose areas with light loads.

Ceiling Fans

Standard ceiling fan installations typically use 14 AWG on 15A circuits.

Doorbells & Low-Power

Low-power devices, doorbells, and signal wiring applications.

NEC Requirements for 14 AWG

  • Maximum Overcurrent Protection: 15 amps per NEC 240.4(D)
  • Not Permitted For: Kitchen small appliance circuits, bathroom circuits, laundry circuits, garage circuits (these require 12 AWG minimum)
  • Voltage Drop: NEC recommends maximum 3% for branch circuits, 5% total

14 AWG Voltage Drop Calculator

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12 AWG
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14 AWG
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