The Eaton Crouse-Hinds TP278 Octagon Outlet Box is a high-quality, steel electrical box designed for junction wiring, ceiling fixture mounting, and conduit systems. Featuring a spacious 15.5 cubic inch capacity, five knockouts, and rugged steel construction, this UL-listed electrical enclosure provides safe, code-compliant installations for residential, commercial, and industrial applications.
Built to accommodate standard electrical fittings, the TP278 ensures long-lasting reliability, making it a top choice for electricians, contractors, and facility managers.
Description
🔹 Key Features & Benefits
✅ Heavy-Duty Steel Construction – Provides superior strength and durability.
✅ Spacious 15.5 Cubic Inch Capacity – Ensures ample room for secure wiring connections.
✅ Multiple Knockouts for Flexible Wiring Configurations:
- (3) 1/2-inch knockouts
- (2) 3/4-inch knockouts
✅ Fixture Rated for Ceiling-Mounted Lighting – Supports various light fixture installations.
✅ UL Listed & NEC Compliant – Meets electrical safety standards for secure applications.
✅ Standard Dimensions (4″ Diameter, 1-1/2″ Depth) – Compatible with a variety of electrical fittings.
✅ Ideal for Junction Box & Conduit Wiring – Suitable for new installations and retrofit projects.
📊 Technical Specifications
| Specification | Details |
|---|---|
| Model Number | TP278 |
| Material | Steel |
| Shape | Octagon |
| Dimensions | 4 inches (Diameter) x 1-1/2 inches (Depth) |
| Capacity | 15.5 cubic inches |
| Knockouts | (3) 1/2-inch, (2) 3/4-inch |
| Fixture Support | Yes (Ceiling-mounted lighting fixtures) |
| Certifications | UL Listed, NEC Compliant |
| Applications | Lighting fixtures, junction box wiring, conduit systems |
🔧 Applications: Where to Use the TP278 Octagon Box?
The Eaton Crouse-Hinds TP278 Octagon Outlet Box is commonly used in:
🔹 Residential Electrical Installations – Perfect for houses, apartments, and condos with ceiling-mounted fixtures.
🔹 Commercial Buildings – Used in offices, retail stores, and hotels for junction box wiring.
🔹 Industrial Facilities – Suitable for factories, warehouses, and heavy-duty electrical installations.
🔹 New Construction & Electrical Renovations – Ensures code-compliant and modern wiring solutions.

