| Property |
Value |
| Gauge 9 Diameter (in) |
0.1144 in |
| Gauge 9 Diameter (mm) |
2.906 mm |
| Gauge 9 Turns of Wire (per inch) |
8.74 turns/in |
| Gauge 9 Turns of Wire (per cm) |
3.44 turns/cm |
| Gauge 9 Cross-Sectional Area (kcmil) |
13.1 kcmil |
| Gauge 9 Cross-Sectional Area (mm²) |
6.63 mm² |
| Copper Resistance (Ω/km or mΩ/m) |
2.599 mΩ/m |
| Copper Resistance (Ω/kft or mΩ/ft) |
0.7921 mΩ/ft |
| NEC Copper Wire Ampacity (60°C) |
30 A |
| NEC Copper Wire Ampacity (75°C) |
35 A |
| NEC Copper Wire Ampacity (90°C) |
40 A |
| Fusing Current (10 s) |
396.0 A |
| Fusing Current (1 s) |
2000.0 A |
| Fusing Current (32 ms) |
11000.0 A |
Frequently Asked Questions (FAQs) About 9 AWG Wire
What does AWG stand for?
AWG stands for American Wire Gauge, a standardized system for measuring wire sizes. The smaller the AWG number, the larger the wire diameter.
How does 9 AWG compare to 8 AWG?
9 AWG wire is smaller than 8 AWG, with a diameter of 2.906 mm compared to 3.264 mm for 8 AWG. It has a lower ampacity (e.g., 40 A at 90°C vs. 55 A for 8 AWG) and higher resistance.
What applications are suitable for 9 AWG wire?
9 AWG wire is typically used for low-current applications, such as control circuits, small equipment wiring, or automotive applications, with an ampacity of up to 40 A at 90°C.
What happens if the fusing current is exceeded?
If the fusing current is exceeded (e.g., 396 A for 10 seconds in 9 AWG), the wire will overheat and melt, potentially causing a fire hazard or circuit failure.
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