metal Box
4" Octagon Box 1-1/2" Deep
Standard 4-inch octagon electrical box with 1-1/2 inch depth. Popular choice for ceiling mounted fixtures and junction points.
15.5
cu.in. Volume
7
Max 14 AWG
6
Max 12 AWG
4" Octagon x 1-1/2"
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. | 10 |
| 16 AWG | 1.75 cu.in. | 8 |
| 14 AWG | 2 cu.in. | 7 |
| 12 AWG | 2.25 cu.in. | 6 |
| 10 AWG | 2.5 cu.in. | 6 |
| 8 AWG | 3 cu.in. | 5 |
| 6 AWG | 5 cu.in. | 3 |
*Theoretical maximum for conductors only. Actual capacity will be less when including devices, clamps, and grounding conductors.
Common Applications
Ceiling light fixtures
Ceiling fans
Junction boxes
Smoke detector mounting
Calculate Box Fill
Use our free calculator to verify NEC 314.16 requirements.
Calculate Box Fill