1. Introduction
The Intermatic PX300 300W Pool Light Transformer is engineered to provide a safe and reliable low-voltage power supply for various lighting applications, including pool and spa lights, submersible fixtures, and outdoor landscape lighting. This transformer converts standard 120 VAC input to selectable 12V, 13V, or 14V AC output, ensuring optimal performance and safety for your lighting system. It features a robust design with built-in circuit protection and a grounded shield for enhanced safety, complying with NEC Code 680.23 requirements for underwater luminaries.
This manual provides essential information for the proper installation, operation, maintenance, and troubleshooting of your Intermatic PX300 transformer. Please read all instructions carefully before proceeding with installation or use.
2. Safety Information
WARNING: Risk of Electric Shock. Installation must be performed by a qualified electrician and in accordance with all national and local electrical codes.
- Always disconnect power at the circuit breaker before installing or servicing the transformer.
- Ensure the transformer is properly grounded. A grounded shield between the primary and secondary windings provides enhanced safety.
- The built-in circuit protection will temporarily disconnect power in case of an overload. If this occurs, remove the cause of the overload before attempting to reset.
- Do not open the transformer enclosure unless instructed to do so by a qualified professional. There are no user-serviceable parts inside.
- Mount the transformer at least 1 foot (0.3 meters) above ground, with the arrows on the unit pointing upwards.
3. Setup & Installation
Proper installation is crucial for the safe and efficient operation of your PX300 transformer. Refer to the diagrams below for visual guidance.
3.1 Mounting the Transformer
The PX300 features a durable 3R beige metal enclosure designed for outdoor installation. It includes top and bottom mounting brackets for secure wall mounting.
- Select a suitable location for mounting, ensuring it is at least 1 foot (0.3 meters) above ground and allows for proper ventilation.
- Use appropriate hardware (not included) to securely fasten the transformer to a sturdy vertical surface using the provided mounting brackets. Ensure the unit is mounted with the arrows pointing upwards.
3.2 Wiring the Transformer
The PX300 is equipped with 10 combination 1/2" - 3/4" knockouts (2 right side, 2 left side, 2 back, and 4 bottom) for flexible wiring connections. Ensure all wiring complies with local electrical codes.
- Step 1: Fix the transformer on the wall. Securely mount the unit as described in Section 3.1.
- Step 2: Connect the black and white wire with your live and neutral wire separately. Route the 120V AC input wires through an appropriate knockout and connect them to the designated terminals inside the transformer.
- Step 3: Choose the appropriate output wire to connect with your low voltage wire. The PX300 offers 12V, 13V, and 14V AC output options. Select the appropriate output terminals based on your lighting requirements and cable length to compensate for voltage drop.
- Step 4: Test it and then install the metal cover. After making all connections, carefully replace the metal cover and secure it. Restore power and test your lighting system.
3.3 Voltage Selection
The PX300 allows you to select between 12V, 13V, and 14V output. This feature is useful for optimizing light brightness and compensating for voltage drop over longer cable runs. Consult your lighting fixture's specifications and cable length guidelines to determine the appropriate voltage setting.
3.4 Product Overview Video
For a visual guide on Intermatic Safety Transformers, including features and benefits, please watch the official product video below.
4. Operating Instructions
Once properly installed and wired, the Intermatic PX300 transformer operates automatically. It converts the incoming 120V AC power to the selected low voltage (12V, 13V, or 14V) for your lighting system.
- Ensure the power supply to the transformer is stable and within the specified 120V AC, 60Hz range.
- The transformer is designed for continuous operation.
- If connected to a timer or photocell (not included), the lighting system will operate according to the schedule set by these external devices.
5. Maintenance
The Intermatic PX300 transformer is designed for minimal maintenance. Regular inspection can help ensure its longevity and safe operation.
- Periodic Inspection: Annually inspect the transformer for any signs of physical damage, corrosion, or loose wiring connections.
- Cleaning: Keep the exterior of the enclosure clean and free from debris. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
- Ventilation: Ensure that the area around the transformer is clear to allow for proper airflow and heat dissipation. Do not obstruct the ventilation openings.
- Overload Protection: If the built-in circuit protection trips, identify and resolve the cause of the overload (e.g., short circuit, too many lights) before the unit automatically resets.
6. Troubleshooting
This section addresses common issues you might encounter with your PX300 transformer.
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to lights | Circuit breaker tripped Loose wiring connection Overload protection tripped Faulty light fixture/bulb | Check household circuit breaker and reset if necessary. Verify all wiring connections are secure (ensure power is off first). Remove any overload (e.g., short circuit, excessive load) and allow the unit to automatically reset (may take up to 15 minutes). Test light fixtures/bulbs individually. |
| Lights are dim | Incorrect voltage setting Voltage drop due to long cable run Too many lights connected | Adjust output voltage to 13V or 14V if applicable. Use heavier gauge wire for longer runs or reduce cable length. Reduce the number of lights or use a higher wattage transformer (e.g., PX600S). |
| Humming noise from transformer | Normal operation Loose mounting Overload | A slight hum is normal for transformers. Ensure it's not excessive. Check mounting screws for tightness. Verify total wattage of connected lights does not exceed 300W. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | PX300 |
| Input Voltage | 120 VAC, 60 Hz, 3.0 A Max |
| Output Voltage | 12V, 13V, or 14V AC |
| Maximum Lamp Wattage | 300W Max |
| Enclosure Type | 3R Beige Metal, Rainproof |
| Knockouts | 10 combination 1/2" - 3/4" (2 right, 2 left, 2 back, 4 bottom) |
| Dimensions (H x W x D) | 7.25" x 5.25" x 4.5" (approx.) |
| Item Weight | 10.9 Pounds |
| Certifications | CSA, UL Listed |
| Power Source | Corded Electric |
| Mounting Type | Wall Mount |
8. Warranty & Support
The Intermatic PX300 Pool Light Transformer comes with a 1-year warranty from the date of purchase, covering defects in materials and workmanship under normal use and service.
For detailed warranty information, technical support, or to access the full user manual in PDF format, please visit the official Intermatic website or refer to the documentation provided with your product.
You can also find the User Manual (PDF) here.
