Eaton Crouse-Hinds 4" Square Extension Ring, Drawn Steel, 1-1/2" Deep, 21 Cu In, with 1/2" Knockouts

Eaton Crouse-Hinds 4" Square Extension Ring, 1-1/2" Deep, Steel

Professional-Grade Steel Extension Ring for Increased Box Capacity

The Eaton Crouse-Hinds 4" Square Extension Ring is a professional-grade steel extension ring engineered to increase electrical box capacity and accommodate additional wiring connections. This drawn steel extension ring delivers 21 cubic inches of additional capacity with twelve 1/2" knockouts for maximum wiring flexibility in commercial and industrial electrical installations.

Key Features & Benefits

Superior Construction & Durability

• Drawn Steel Construction - Provides exceptional strength and dimensional stability for long-term reliability
• Professional-Grade Materials - Engineered to withstand the demands of commercial and industrial environments
• Precision Manufacturing - Ensures perfect alignment with standard 4" square boxes and covers
• Corrosion-Resistant Finish - Steel construction with protective coating for extended service life

Maximum Wiring Flexibility

• 21 Cubic Inch Capacity - Significantly increases available space for wire connections and splices
• Twelve 1/2" Knockouts - Provides multiple conduit entry options for complex wiring configurations
• Standard 4" Square Compatibility - Works seamlessly with existing electrical box systems
• 1-1/2" Extension Depth - Optimal depth for accommodating additional devices and connections

Code Compliance & Safety

• NEC/CEC Compliant - Meets all National Electrical Code and Canadian Electrical Code requirements
• Professional Installation - Designed for quick, secure mounting to existing electrical boxes
• Grounding Continuity - Maintains proper electrical grounding throughout the system

Technical Specifications

This extension ring features a standard 4" x 4" square configuration with 1-1/2" depth extension, constructed from drawn steel for superior strength and durability. The unit provides 21 cubic inches of additional capacity and includes twelve strategically positioned 1/2" knockouts for maximum conduit entry flexibility. The steel construction ensures long-term reliability while maintaining NEC/CEC compliance for professional electrical installations. Dimensions are 4" length x 4" width x 1.5" height with a lightweight 0.46 lb construction for easy handling and installation.

Installation Process

1. Turn off power at the circuit breaker and verify with a non-contact voltage tester
2. Remove existing cover plate and carefully pull wires from the current box
3. Position the extension ring over the existing 4" square box, ensuring proper alignment
4. Secure the extension ring using appropriate mounting screws through the box tabs
5. Remove necessary knockouts using a knockout punch or hammer and drift pin
6. Install conduit connections and route wiring through the extended space
7. Make all electrical connections following NEC/CEC guidelines for box fill calculations
8. Install appropriate cover plate and restore power after final inspection

Applications

Perfect for:

• Commercial Buildings - Office complexes, retail spaces, and healthcare facilities requiring additional wiring capacity
• Industrial Facilities - Manufacturing plants and processing facilities with complex electrical distribution needs
• Electrical Panel Extensions - Motor control centers and distribution panels requiring increased connection space
• Renovation Projects - Upgrading existing electrical systems without replacing entire box assemblies
• Multi-Circuit Applications - Junction boxes serving multiple branch circuits and control systems
• Device Mounting - Accommodating deeper electrical devices, switches, and receptacles
• Wire Management - Organizing complex wiring runs in commercial and industrial installations
• Code Compliance Upgrades - Meeting current NEC box fill requirements in existing installations

Extension Ring System Benefits

Extension rings provide a cost-effective solution for increasing electrical box capacity without the expense and complexity of complete box replacement. They allow electrical contractors to accommodate additional circuits, larger devices, or increased wire counts while maintaining code compliance. The modular design enables precise depth adjustment for specific application requirements, making them ideal for retrofit and expansion projects where existing boxes need enhanced capacity.

Why Choose Drawn Steel Construction?

Drawn steel construction offers superior dimensional accuracy and strength compared to stamped alternatives, ensuring perfect alignment with existing electrical boxes and covers. The drawing process creates uniform wall thickness and eliminates weak points that can develop in stamped products. This manufacturing method, combined with Eaton Crouse-Hinds' century of electrical expertise, delivers professional-grade reliability that electrical contractors trust for critical commercial and industrial applications.