4" Octagon Steel Electrical Conduit Box With Combination Knockout
Description
The 4" Octagon Steel Electrical Conduit Box With Combination Knockout is designed for ceiling and wall-mounted conduit installations requiring flexible conduit entry options. Manufactured from high-quality pre-galvanized steel, this octagon box provides strong mechanical protection and reliable enclosure for electrical wiring connections.
The combination knockouts (1/2"–3/4") allow installers to select different conduit sizes without additional modification, improving installation efficiency and reducing inventory complexity. It is widely used in EMT conduit systems for lighting fixtures and electrical distribution applications.
Specification
Product Name: 4" Octagon Steel Electrical Conduit Box With Combination Knockout
Material: Pre-Galvanized Steel / Galvanized Steel
Size: 4 inch Octagon
Depth: 1-1/2", 2-1/8"
Thickness: 0.8mm – 1.6mm
Grounding: Raised ground screw included
Knockout Type: Combination Knockout (1/2" & 3/4")
Installation Type: Ceiling or wall mounted
Finish: Zinc coated
Standard: UL
OEM/ODM: Supported
| CAT# | Size | Depth | Hole Size | Knockouts | Thickness | ||
|---|---|---|---|---|---|---|---|
| Sides | Ends | Bottom | mm | ||||
| OBC1121 | 4"x4" | 1-1/2" | COM | 2xCOM | 2xCOM | 3x1/2"&2x3/4" | 0.8-1.6 |
| OBC1122 | 4"x4" | 1-1/2" | COM | 2xCOM | 2xCOM | 1x1/2"&4xCOM | 0.8-1.6 |
| OBC2181 | 4"x4" | 2-1/8" | COM | 2xCOM | 2xCOM | 3x1/2"&2x3/4" | 1.0-1.6 |
| OBC2182 | 4"x4" | 2-1/8" | COM | 2xCOM | 2xCOM | 1x1/2"&4xCOM | 1.0-1.6 |
Application
EMT conduit systems
Lighting fixture installation
Commercial building wiring
Residential electrical projects
Industrial electrical distribution systems
Packing
Standard export carton
Pallet packing available
Customized packaging supported
Advantage
Combination knockouts for flexible 1/2" & 3/4" conduit entry
High-strength galvanized steel construction
Excellent corrosion resistance
Precise stamping and accurate knockout alignment
Smooth edges for safer installation
Stable production capacity for bulk supply
Strict quality control before shipmen
Tags
4 Inch Octagon Box, Combination Knockout Electrical Box, Steel Octagon Conduit Box, Lighting Junction Box, EMT Electrical Box, Galvanized Steel Box, Metal Octagon Box
