metal Box
Masonry Box 3-1/2" Deep
Masonry box designed for concrete and block wall installations.
21
cu.in. Volume
10
Max 14 AWG
9
Max 12 AWG
3-3/4" x 4" x 3-1/2"
Dimensions
Conductor Capacity per NEC 314.16
Maximum number of conductors that can fit in this box based on wire gauge (not accounting for devices, clamps, or grounds).
| Wire Gauge | Volume Each | Max Conductors* |
|---|---|---|
| 18 AWG | 1.5 cu.in. | 14 |
| 16 AWG | 1.75 cu.in. | 12 |
| 14 AWG | 2 cu.in. | 10 |
| 12 AWG | 2.25 cu.in. | 9 |
| 10 AWG | 2.5 cu.in. | 8 |
| 8 AWG | 3 cu.in. | 7 |
| 6 AWG | 5 cu.in. | 4 |
*Theoretical maximum for conductors only. Actual capacity will be less when including devices, clamps, and grounding conductors.
Common Applications
Concrete walls
Block construction
Masonry installations
Calculate Box Fill
Use our free calculator to verify NEC 314.16 requirements.
Calculate Box Fill