The Eaton Crouse-Hinds TP258 Octagon Outlet Box Extension Ring is designed to provide additional cubic capacity to standard octagon outlet boxes, ensuring a safe, code-compliant electrical installation. Made from durable galvanized steel, this extension ring allows for extra wiring space and is ideal for junction boxes, lighting fixtures, and conduit extensions in commercial, industrial, and residential applications.
Featuring (4) 1/2-inch knockouts, the TP258 extension ring offers easy conduit access, making installations faster and more efficient.
Description
🔹 Key Features & Benefits
✅ Durable Galvanized Steel Construction – Provides long-lasting protection against corrosion and wear.
✅ Increases Wiring Capacity – Expands outlet box volume by 9.0 cubic inches, allowing for safer and more organized wiring.
✅ Multiple Knockouts for Flexible Conduit Entry – Equipped with (4) 1/2-inch side knockouts for seamless wiring.
✅ UL Listed & NEC Compliant – Ensures safety and compliance with electrical codes.
✅ Ideal for Lighting Fixtures & Junction Box Extensions – Supports ceiling and wall-mounted electrical installations.
✅ Pre-Galvanized Finish – Enhances corrosion resistance, making it suitable for various environments.
📊 Technical Specifications
| Specification | Details |
|---|---|
| Model Number | TP258 |
| Material | Galvanized Steel |
| Shape | Octagon |
| Diameter | 3-1/4 inches |
| Depth | 1-1/2 inches |
| Capacity | 9.0 cubic inches |
| Knockouts | (4) 1/2-inch side knockouts |
| Mounting | Direct attachment to existing octagon outlet boxes |
| Certifications | UL Listed, NEC Compliant |
| Applications | Lighting fixtures, junction box extensions, conduit wiring |
🔧 Applications: Where to Use the TP258 Extension Ring?
The Eaton Crouse-Hinds TP258 Octagon Extension Ring is widely used in:
🔹 Commercial Buildings – Offices, warehouses, and retail spaces.
🔹 Residential Installations – Houses, apartments, and condominiums.
🔹 Industrial Settings – Factories, workshops, and production facilities.
🔹 Ceiling & Wall Fixture Installations – Provides additional space for safe wiring.
🔹 Junction Box Extensions – Ideal for accommodating extra wires and conduits.

