The Eaton TP320 is a 4-inch octagon outlet box, part of the Crouse-Hinds series, designed to facilitate secure and efficient electrical installations in residential, commercial, and industrial settings. Constructed from durable galvanized steel, this fixture-rated junction box offers a 21.5 cubic inch capacity and features an S-bracket for versatile mounting options. Equipped with non-metallic (NM) cable clamps, the TP320 ensures streamlined installations and compliance with safety standards.
Description
Technical Specifications
| Feature | Specification |
|---|---|
| Brand | Eaton (Crouse-Hinds Series) |
| Model Number | TP320 |
| Box Type | 4-Inch Octagon Outlet Box |
| Material | Galvanized Steel |
| Capacity | 21.5 Cubic Inches |
| Depth | 2-1/8 Inches |
| Knockouts | 6 total – 1 bottom (1/2″), 1 side (1/2″), 4 cable side |
| Cable Clamps | Integrated non-metallic (NM) cable clamps |
| Mounting System | S-bracket with 1/2-inch offset |
| Fixture Rated | Yes |
| Compliance | UL Listed, NEMA OS-1 Compliant |
| Application | Residential, Commercial, Industrial |
Key Features & Benefits
1. Durable Galvanized Steel Construction
- Galvanized steel body ensures durability and resistance to corrosion.
- Provides a secure enclosure for electrical wiring connections.
2. Spacious 21.5 Cubic Inch Capacity
- Ample space for wire connections and splicing.
- Helps prevent overcrowding, reducing the risk of overheating.
3. Multiple Knockouts for Flexible Wiring
- 6 total knockouts offer various conduit or cable entry points:
- Bottom Knockout: (1) 1/2-inch.
- Side Knockouts: (1) 1/2-inch.
- Cable Side Knockouts: (4) for non-metallic cable entry.
4. Integrated Non-Metallic (NM) Cable Clamps
- Built-in NM cable clamps secure cables without additional hardware.
- Simplifies installation, saving time and reducing costs.
5. Fixture Rated for Versatile Applications
- Rated for fixture support, making it ideal for ceiling or wall-mounted lighting.
- Ensures compliance with safety standards for fixture installations.
6. S-Bracket for Flexible Mounting
- S-bracket with 1/2-inch offset allows for versatile mounting options along studs or joists.
- Facilitates precise positioning during installation.
7. UL Listed & NEMA Compliant
- UL certified, ensuring safe operation.
- Compliant with NEMA OS-1 standards for quality and performance.
Common Applications
The Eaton TP320 octagon outlet box is widely used for:
- Residential Wiring – Ideal for home electrical junction boxes.
- Commercial Installations – Suitable for lighting and electrical systems in offices and buildings.
- Industrial Electrical Systems – Designed for high-demand electrical setups.
- Ceiling Light Fixtures & Fans – Securely mounts lighting fixtures and ceiling fans.
Why Choose the Eaton TP320?
- Durable & High-Quality – Made from galvanized steel for long-lasting performance.
- Integrated Cable Clamps – Built-in NM cable clamps for quick and secure wiring.
- Versatile Mounting – Equipped with an S-bracket for flexible installation.
- Safe & Code-Compliant – UL Listed and NEMA compliant for safety and performance.
- Fixture Rated – Suitable for supporting lighting fixtures, ensuring compliance with safety standards.

