Introduction
This manual provides essential instructions for the safe and proper installation, operation, and maintenance of the Reliance Controls PBN50 50-Amp NEMA 3R Non-Metallic Power Inlet Box. This product is designed to facilitate the connection of a portable generator to a building's electrical system, ensuring power is supplied safely and efficiently during outages.
Important Safety Information
WARNING: Installation of this product involves high voltage electricity. Improper installation or use can result in serious injury, death, or property damage. Always consult with a qualified electrician for installation to ensure compliance with all local and national electrical codes.
- Carbon Monoxide Hazard: Generators produce carbon monoxide, a colorless, odorless, and deadly gas. Always operate generators outdoors in a well-ventilated area, far away from windows, doors, and vents to prevent fumes from entering enclosed spaces.
- Electrical Shock Hazard: Ensure all power sources are disconnected before performing any installation or maintenance. Do not work on live circuits.
- Grounding: Proper grounding is critical for safety. Ensure the inlet box and generator are correctly grounded according to electrical codes.
- Overload Protection: Do not exceed the rated amperage of the inlet box (50 Amps) or the connected generator.
Product Overview
The Reliance Controls PBN50 is a 50-Amp NEMA 3R rated non-metallic power inlet box designed for outdoor use. It provides a safe and convenient connection point for a portable generator to supply power to a transfer switch or panel. Key features include:
- NEMA 3R Enclosure: Provides protection against rain, sleet, and external ice formation.
- Non-Metallic Construction: Durable acrylonitrile butadiene styrene (ABS) material.
- Generous Wiring Space: Facilitates easy wiring of heavy gauge cables.
- Removable Face/Panel: Allows for simplified placement and wiring of the receptacle.
- Spring-Loaded Inlet Cap: Protects the CS6375 twist-lock connector from moisture and debris when not in use.
- Multiple Knockouts: Four combination 1/2-inch and 3/4-inch knockouts (one on each side, bottom, and back) for flexible conduit entry.
- Downward-Facing Receptacle: Reduces strain on the generator cord and provides additional weather protection.
Installation
Installation must be performed by a qualified electrician in accordance with all applicable national and local electrical codes (e.g., NEC, CSA). Ensure all power is disconnected before beginning installation.
- Location Selection: Choose an outdoor location for the inlet box that is easily accessible for generator connection, away from windows, doors, and vents, and close to the transfer switch or panel it will feed. The NEMA 3R rating ensures weather resistance.
- Mounting:
- The inlet box features built-in stand-offs, ensuring it does not sit flush against the mounting surface. This design accommodates the top lid's overhang.
- Securely mount the box to a sturdy surface using appropriate fasteners through the designated mounting holes.
- Conduit Entry: Select one of the four combination 1/2-inch and 3/4-inch knockouts for conduit entry. Remove the knockout carefully.
- Wiring Access: The lower panel, which houses the 50-amp connector, can be slid out forward. This feature provides ample space and flexibility for connecting the heavy gauge wires to the receptacle terminals.
- Wiring Connections:
- Connect the appropriate gauge wires (typically 6 AWG for 50 Amps) from the transfer switch or panel to the terminals on the CS6375 receptacle.
- Refer to the wiring diagram provided with the product for correct terminal identification (X, Y, W, G for Line 1, Line 2, Neutral, and Ground, respectively).
- Ensure all connections are tight and secure.
- Leave a small service loop of wire inside the box for future access if needed.
- Reassembly: Once wiring is complete, slide the lower panel back into place and secure the top/front panel using the provided screws. Ensure all seals are properly seated to maintain the NEMA 3R rating.
- Final Check: Before restoring power, double-check all connections and ensure the installation is compliant with all safety standards.
Operation
Once the Reliance Controls PBN50 Power Inlet Box is correctly installed and connected to a transfer switch or panel, follow these steps to operate your generator safely:
- Position Generator: Place your portable generator outdoors in a safe, well-ventilated area, away from any building openings.
- Connect Generator Cord: Open the spring-loaded cap on the inlet box. Connect the appropriate 50-amp generator power cord (CS6364 type) to the CS6375 receptacle in the inlet box. Ensure the connection is secure and twist-locked.
- Start Generator: Follow your generator's manufacturer instructions to start it. Allow it to warm up for a few minutes.
- Engage Transfer Switch: Operate your transfer switch or panel interlock device to safely transfer power from the utility to the generator. This prevents backfeeding the utility grid.
- Monitor Power: Verify that power is being supplied to your home's circuits as intended.
- Disconnect Generator: When utility power is restored or generator use is no longer needed, first disengage the transfer switch to isolate the generator. Then, shut down the generator according to its instructions. Finally, disconnect the generator cord from the inlet box and close the spring-loaded cap.
Maintenance
The Reliance Controls PBN50 Power Inlet Box requires minimal maintenance. Regular inspection can help ensure its longevity and safe operation.
- Periodic Inspection: Annually, or before each generator use, inspect the inlet box for any signs of physical damage, cracks, or discoloration. Check the spring-loaded cap for proper function and ensure it seals tightly.
- Cleanliness: Keep the exterior of the box clean and free of debris. Use a damp cloth to wipe down the surface. Do not use harsh chemicals or abrasive cleaners.
- Connection Check: Periodically, with power disconnected, check the tightness of the wiring connections inside the box. Loose connections can lead to overheating and electrical hazards.
- UV Exposure: While designed for outdoor use, prolonged direct UV exposure can cause some plastic materials to yellow over time. This is typically cosmetic and does not affect functionality, but can be mitigated by painting the box with UV-resistant paint if desired.
Troubleshooting
If you encounter issues with your Reliance Controls PBN50 Power Inlet Box, consider the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to house circuits when generator is running. |
|
|
| Inlet box appears damaged or discolored. |
|
|
| Spring-loaded cap does not close properly. |
|
|
For issues not covered here, or if you are uncomfortable performing troubleshooting, contact a qualified electrician or Reliance Controls customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Reliance Controls |
| Model Number | PBN50 |
| Current Rating | 50 Amps |
| Voltage | 120/240 Volts (typical for 50A generator circuits) |
| Maximum Running Wattage | 12,500 Watts |
| Enclosure Type | NEMA 3R (Raintight) |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Product Dimensions (L x W x H) | 6.5" x 7.5" x 4.5" |
| Item Weight | 1.9 Pounds |
| Connector Type | CS6375 (50 Amp, 125/250V Locking) |
| Knockouts | Four combination 1/2" and 3/4" |
Warranty and Support
Reliance Controls Corporation products are manufactured to high standards and are backed by a manufacturer's warranty. For specific warranty details, duration, and terms, please refer to the documentation included with your purchase or visit the official Reliance Controls website.
For technical support, parts, or service inquiries, please contact Reliance Controls customer service directly. Contact information can typically be found on their official website or on the product packaging.
