4" Octagon Steel Electrical Conduit Box With Combination Knockout
Description
The 4" Octagon Steel Electrical Conduit Box Extension Ring is designed to increase the wiring capacity of standard 4-inch octagon conduit boxes. Manufactured from high-quality pre-galvanized steel, this extension ring provides additional depth to accommodate extra conductors, lighting fixture wires, or device connections.
It is widely used in commercial, residential, and industrial electrical installations where box fill capacity must meet code requirements. The extension ring ensures precise alignment with standard 4" octagon boxes for secure and stable installation.
Specification
Product Name: 4" Octagon Steel Electrical Conduit Box Extension Ring
Material: Pre-Galvanized Steel / Galvanized Steel
Size: 4 inch Octagon
Depth: 1-1/2"
Thickness: 0.8mm – 1.6mm
Grounding: Raised ground screw included
Knockout : 1/2" & 3/4"
Installation Type: Mounted with standard 4" octagon box
Finish: Zinc coated
Standard: UL
OEM/ODM: Supported
| CAT# | Size | Depth | Hole Size | Knockouts | Thickness | ||
|---|---|---|---|---|---|---|---|
| Sides | Ends | Bottom | mm | ||||
| OBE50112 | 4"x4" | 1-1/2" | 1/2" | 2x1/2" | 2x1/2" | - | 0.8-1.6 |
| OBE75112 | 4"x4" | 1-1/2" | 3/4" | 2x3/4" | 2x3/4" | - | 0.8-1.6 |
| OBEM75112 | 4"x4" | 1-1/2" | 1/2"&3/4" | 2x1/2" | 2x3/4" | - | 0.8-1.6 |
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 Extension Ring, Steel Octagon Box Extension, Electrical Box Extender, Octagon Junction Box Ring, EMT Box Accessory, Galvanized Steel Ring
