The Reliance Controls transfer switch is a crucial component for safely and efficiently managing power from a portable generator to a home's electrical system during outages. Designed with safety and convenience in mind, this device ensures that generator power is controlled and distributed correctly, protecting both the user and the electric utility provider.
Function Description
The primary function of the Reliance Controls transfer switch is to act as a bridge between a portable generator and a home's electrical load center. It allows users to select either utility (LINE) or generator (GEN) power as the source for specific branch circuits within the home. This manual transfer switch prevents the dangerous backfeeding of generator power into the utility grid, a critical safety feature mandated by electrical codes.
The transfer switch system is designed to handle generators up to 7500 watts continuous output, accommodating both 20-amp and 30-amp twist-lock power receptacles. It distributes power from the generator to selected branch circuits, enabling essential appliances like sump pumps, refrigerators, and furnaces to operate during a power outage. This eliminates the need for messy extension cords running through open doors and windows, providing a more organized and secure power solution.
A key aspect of its functionality is load management. The transfer switch allows users to balance the electrical load between the two "halves" of the generator's output (typically 120/240 volts). This ensures that the generator's capacity is not exceeded, optimizing its performance and preventing overloads. Users can manually switch appliances on and off as needed, or, if preferred, set up the system to run all selected circuits simultaneously, provided the generator has sufficient capacity. The inclusion of wattmeters on some models allows for visual monitoring of the wattage being used, helping users stay within their generator's limits.
The transfer switch also facilitates the connection of an outdoor power inlet box, which provides a safe and convenient point to plug in the generator from a remote location outside the house. This hardwired connection eliminates the need for long generator power cords to run through the home, enhancing safety and convenience.
Usage Features
The Reliance Controls transfer switch is designed for user-friendly operation, even during stressful power outage situations.
- Circuit Selector Toggle Switches: Each branch circuit connected to the transfer switch has a toggle switch, allowing users to easily select between "GEN" (generator), "LINE" (utility), or "OFF" as the power source. The "OFF" position is generally not used, as it removes the circuit from both generator and utility power.
- Branch-Rated Circuit Breakers: Each transfer switch circuit is equipped with a corresponding 15-amp or 20-amp push-to-reset circuit breaker. These breakers protect the branch circuit when the toggle switch is in the "GEN" position. In the "LINE" position, the branch circuit is protected by the breaker in the main load center.
- Wattmeters: For models equipped with wattmeters, these displays indicate the total load on the generator in watts. This feature helps users monitor how close their generator is to its maximum capacity, aiding in effective load management.
- Handle Ties: These are used to link two 120-volt circuits together to create a 240-volt circuit, which is necessary for larger appliances like well pumps. The kit comes with one factory-installed handle tie for two adjacent circuits, and additional ties can be added or removed as needed.
- Pre-Wired Flexible Conduit Whip: The transfer switch includes a pre-wired flexible conduit whip containing all the hot, neutral, and ground wires necessary for connection to the home's load center. The wires are color-coded and marked with switch letters for easy identification, simplifying the installation process.
- Outdoor Power Inlet Box: The kit includes a 30-amp NEMA 3-configured outdoor generator power inlet box. This box mounts on the exterior of the house, providing a weatherproof connection point for the generator power cord. It allows for direct wiring to the transfer switch and load center from a remote location, offering flexibility in generator placement.
- Generator Power Cord: A 30-amp, 10-foot long outdoor-rated power cord with L14-30 connectors is provided. One end plugs into the generator's power outlet, and the other into the Reliance Power Inlet Box. An interchangeable 20-amp plug is available upon request for generators with only 20-amp power outlets.
- Load Balancing: Users are encouraged to plan their generator load by dividing appliances with higher wattages between the two sides of the transfer switch to optimize generator performance and prevent overloads. A Home Circuit Mapping Chart is provided to assist in this planning.
- Optional Power Inlet on Transfer Switch: The transfer switch's unique design allows for the installation of an accessory power inlet directly onto the unit's front panel. This provides an alternative connection method for the generator, allowing for a direct plug-in with a longer power cord if desired, though this is not the primary installation method for the kit.
Maintenance Features
While the Reliance Controls transfer switch is designed for durability and long-term performance, regular checks ensure its readiness and proper functioning.
- Monthly Operational Check: To ensure the generator and transfer switch system are ready for an emergency, it is recommended to perform a monthly operational check. This involves starting and running the generator power through the transfer switch circuits.
- Fuel Management: Keeping the generator's fuel tank filled with fresh fuel is crucial for readiness.
- Wiring Integrity: The system's design, with a patented internal wiring compartment, eliminates the need for additional junction boxes, reducing potential points of failure and simplifying maintenance. The pre-wired flexible conduit whip ensures secure and organized connections.
- Circuit Breaker Protection: The built-in circuit breakers on the transfer switch protect the circuits when operating on generator power. In the event of an overload, these breakers will trip, preventing damage to the generator or appliances. They can be easily reset by pushing the button.
- Safety Features: The double-throw, break-before-make action of the transfer switch is a fundamental safety feature. It physically isolates the home's electrical system from the utility grid before connecting to the generator, and vice-versa. This prevents dangerous backfeeding and eliminates the need to turn off load center breakers when starting the generator, even when utility power is functional.
- Durable Construction: Reliance Controls has a long history of manufacturing high-quality electrical equipment, ensuring the transfer switch is built to last. The outdoor power inlet box is NEMA 3-configured, providing robust protection against environmental elements.
The Reliance Controls transfer switch is a reliable and essential device for anyone seeking a safe, efficient, and convenient way to power their home with a portable generator during power outages. Its thoughtful design, comprehensive features, and emphasis on safety make it a valuable investment for emergency preparedness.
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