1. Introduction
This manual provides essential information for the safe and effective installation and maintenance of the Crouse-Hinds TP428 Steel Extension Ring. Please read these instructions carefully before beginning any work to ensure proper installation and to prevent potential hazards.
2. Safety Information
WARNING: Risk of electric shock. Installation must be performed by a qualified electrician in accordance with all national and local electrical codes. Always disconnect power at the circuit breaker or fuse box before installing or servicing this product.
- Ensure all wiring connections are secure and properly insulated.
- Do not exceed the maximum fill capacity of the extension ring.
- Use appropriate personal protective equipment (PPE) during installation.
3. Product Overview
The Crouse-Hinds TP428 is a 4-inch square steel extension ring designed to provide additional wiring space and accommodate devices in electrical box installations. It features a 1-1/2 inch depth, offering 21 cubic inches of capacity. This metallic extension ring includes side knockouts for versatile conduit connections.
Key Features:
- Increased Wiring Space: Adds 21 cubic inches of volume to an existing electrical box.
- Versatile Knockouts: Equipped with (8) 1/2 inch and (4) 3/4 inch side knockouts for flexible conduit entry.
- Durable Construction: Made from alloy steel for long-lasting performance.
- Ground Screw Location: Features a raised ground screw location for easier installation.
- Bonding Jumper Not Required: Knockouts are designed for use in circuits above or below 250-Volt without requiring a bonding jumper.
4. Specifications
| Attribute | Value |
|---|---|
| Model Number | TP428 |
| Material | Alloy Steel |
| Dimensions (D x W x H) | 1.5" x 4" x 1.5" |
| Capacity | 21 Cubic Inches |
| Side Knockouts | (8) 1/2", (4) 3/4" |
| Finish Type | Metallic |
| Installation Type | Screw-In |
| Item Weight | 7.4 ounces |
5. Installation
Follow these steps for proper installation of the TP428 Steel Extension Ring:
- Power Disconnection: Before starting, ensure that power to the circuit is completely disconnected at the main service panel (circuit breaker or fuse box). Verify with a voltage tester.
- Prepare Existing Box: If attaching to an existing electrical box, ensure the box is securely mounted and free from damage.
- Select Knockouts: Determine the required conduit entry points. Use a knockout punch or screwdriver and hammer to remove the appropriate 1/2" or 3/4" knockouts from the extension ring.
- Attach Conduit/Fittings: Install conduit connectors or cable clamps into the selected knockouts.
- Mount Extension Ring: Align the extension ring with the existing electrical box. Secure the extension ring to the box using appropriate screws through the designated mounting holes. Ensure a tight and secure fit.
- Wiring: Route wires through the conduit/fittings into the extension ring. Make all necessary electrical connections according to local codes. Utilize the raised ground screw location for grounding conductors.
- Cover Installation: Once wiring is complete and connections are secure, install the appropriate cover plate or device onto the extension ring.
- Restore Power: After ensuring all connections are safe and secure, restore power to the circuit.
6. Maintenance
The Crouse-Hinds TP428 Steel Extension Ring requires minimal maintenance. Periodically inspect the installation for any signs of wear, corrosion, or loose connections. Ensure that the cover plate remains securely fastened. If any damage is observed, disconnect power and replace the component as necessary.
7. Warranty and Support
Crouse-Hinds products are manufactured to high standards. For specific warranty information, please refer to the documentation provided with your purchase or visit the official Crouse-Hinds website. For technical support or inquiries, please contact Crouse-Hinds customer service through their official channels.
Contact Information:
- Official Website: Eaton Crouse-Hinds
- Customer Service: Refer to website for regional contact details.
