10
10 AWG Wire Box Fill
10 AWG conductors are used for 30-amp circuits such as dryers and water heaters.
2.5
cu.in. per conductor
41
mm3 per conductor
30A
Max Ampacity
Common Applications
30-amp circuits
Electric dryers
Water heaters
AC units
Box Capacity 10 AWG
Maximum number of conductors that fit in common electrical boxes (conductors only, not accounting for devices, clamps, or grounds).
| Box Type | Volume | Max 10 AWG* |
|---|---|---|
| 4" Square x 1-1/4" Deep | 18 cu.in. | 7 |
| 4" Square x 1-1/2" Deep | 21 cu.in. | 8 |
| 4" Square x 2-1/8" Deep | 30.3 cu.in. | 12 |
| 4-11/16" Square x 1-1/4" Deep | 25.5 cu.in. | 10 |
| 4-11/16" Square x 1-1/2" Deep | 29.5 cu.in. | 11 |
| 4-11/16" Square x 2-1/8" Deep | 42 cu.in. | 16 |
| Octagon Box 1-1/2" Deep | 15.5 cu.in. | 6 |
| 4" Octagon Box 1-1/2" Deep | 15.5 cu.in. | 6 |
| Octagon Box 2-1/8" Deep | 21.5 cu.in. | 8 |
| Single Gang Device Box 2-3/4" Deep | 14 cu.in. | 5 |
| Single Gang Device Box 18 cu.in. | 18 cu.in. | 7 |
| Single Gang Device Box 3-1/2" Deep | 18 cu.in. | 7 |