4" × 4" Square Steel Electrical Box
Description
The 4" × 4" Square Steel Electrical Box is designed for electrical conduit installations requiring larger wiring capacity and flexible conduit connections. Manufactured from high-quality pre-galvanized steel, this square box provides strong mechanical protection and secure enclosure for electrical wiring devices and junction connections.
With its spacious interior design, the 4" × 4" square box is widely used in commercial and industrial electrical systems where multiple conduit entries and wire splicing are required. It is suitable for EMT conduit installations and meets North American application standards.
Specification
Product Name: 4" × 4" Square Steel Electrical Box
Material: Pre-Galvanized Steel / Galvanized Steel
Size: 4 inch × 4 inch
Depth: 1-1/2", 2-1/8"
Thickness: 0.8mm – 1.6mm
Knockouts: 1/2" & 3/4" standard knockouts
Installation Type: Surface mounted
Finish: Zinc coated
Standard: UL
OEM/ODM: Supported
| CAT# | Size | Depth | Hole Size | Knockouts | Thickness | ||
|---|---|---|---|---|---|---|---|
| Sides | Ends | Bottom | mm | ||||
| SB50112 | 4"x4" | 1-1/2" | 1/2" | 6x1/2" | 6x1/2" | 5x1/2" | 0.8-1.6 |
| SB75112 | 4"x4" | 1-1/2" | 3/4" | 4x3/4" | 4x3/4" | 3x1/2"&2x3/4" | 0.8-1.6 |
| SBM112 | 4"x4" | 1-1/2" | 1/2"&3/4" | 4x1/2"&2x3/4" | 4x1/2"&2x3/4" | 3x1/2"&2x3/4" | 0.8-1.6 |
| SB50218 | 4"x4" | 2-1/8" | 1/2" | 6x1/2" | 6x1/2" | 5x1/2" | 1.0-1.6 |
| SB75218 | 4"x4" | 2-1/8" | 3/4" | 4x3/4" | 4x3/4" | 3x1/2"&2x3/4" | 1.0-1.6 |
| SBM218 | 4"x4" | 2-1/8" | 1/2"&3/4" | 4x1/2"&2x3/4" | 4x1/2"&2x3/4" | 3x1/2"&2x3/4" | 1.0-1.6 |
| SB100218 | 4"x4" | 2-1/8" | 1" | 4x1" | 4x1" | 3x1/2"&2x3/4" | 1.0-1.6 |
| SBM1218 | 4"x4" | 2-1/8" | 3/4"&1" | 2x3/4"&2x1" | 2x3/4"&2x1" | 3x1/2"&2x3/4" | 1.0-1.6 |
Application
EMT conduit systems
Commercial building wiring
Industrial power distribution
Junction and wire splicing applications
Electrical retrofitting and expansion projects
Packing
Standard export carton
Pallet packing available
Customized packaging supported
Advantage
Larger internal capacity for multiple conductors
High-strength galvanized steel construction
Excellent corrosion resistance
Accurate knockout positioning for easy conduit entry
Smooth edges for safer installation
Stable bulk production capability
Strict quality control before shipment
Tags
4x4 Square Box, Steel Electrical Box, Square Junction Box, EMT Conduit Box, Galvanized Electrical Box, Metal Junction Box, Surface Mount Electrical Box
