| Property |
Value |
| Gauge 7 Diameter (in) |
0.1443 in |
| Gauge 7 Diameter (mm) |
3.665 mm |
| Gauge 7 Turns of Wire (per inch) |
6.93 turns/in |
| Gauge 7 Turns of Wire (per cm) |
2.73 turns/cm |
| Gauge 7 Cross-Sectional Area (kcmil) |
20.8 kcmil |
| Gauge 7 Cross-Sectional Area (mm²) |
10.5 mm² |
| Copper Resistance (Ω/km or mΩ/m) |
1.634 mΩ/m |
| Copper Resistance (Ω/kft or mΩ/ft) |
0.4982 mΩ/ft |
| NEC Copper Wire Ampacity (60°C) |
40 A |
| NEC Copper Wire Ampacity (75°C) |
50 A |
| NEC Copper Wire Ampacity (90°C) |
55 A |
| Fusing Current (10 s) |
561.0 A |
| Fusing Current (1 s) |
3200.0 A |
| Fusing Current (32 ms) |
18000.0 A |
Frequently Asked Questions (FAQs) About 7 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 7 AWG compare to 6 AWG?
7 AWG wire is smaller than 6 AWG, with a diameter of 3.665 mm compared to 4.115 mm for 6 AWG. It has a lower ampacity (e.g., 55 A at 90°C vs. 75 A for 6 AWG) and higher resistance.
What applications are suitable for 7 AWG wire?
7 AWG wire is typically used for lower-current applications, such as lighting circuits, small equipment, or control wiring, with an ampacity of up to 55 A at 90°C.
What happens if the fusing current is exceeded?
If the fusing current is exceeded (e.g., 561 A for 10 seconds in 7 AWG), the wire will overheat and melt, potentially causing a fire hazard or circuit failure.
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