Generac RXG42SHA1 200A 1ph-120/240V Service Rated Nema 1 Automatic Transfer Switch with 42-circuit Load Center

Generac RXG42SHA1 200A 1ph-120/240V Service Rated Nema 1 Automatic Transfer Switch with 42-circuit Load Center Features:

Generac RXG42SHA1 200A Automatic Transfer Switch Features:

The Generac RXG42SHA1 is a high-capacity, service-entrance rated automatic transfer switch combined with a load center—designed to serve as your main panel where local code allows. This unit blends essential functions—main breaker, ATS, and circuit breaker panel—into one flush-mount NEMA 1 steel enclosure, helping streamline wiring, simplify installation, and protect your home’s essential and non-essential loads during utility outages.

Built for larger homes, the switch is 200 amps and single-phase (120/240V), integrating a 42-space load center that’s expandable to 60 circuits when using tandem breakers. It includes built-in load management that handles up to four HVAC (24 VAC) loads without needing extra modules—an effective way to reduce generator size while ensuring you maintain comfort and safety for key systems during an outage.

This switch is designed for indoor installation in clean, dry environments. Its NEMA 1 enclosure protects its internal components from dust and solid debris. All timing, voltage sensing, switching delays, and automatic return to utility are controlled by the generator’s controller (such as Generac’s Evolution™ or Nexus™). And with a full 5-year limited warranty, it offers long-term reliability and peace of mind.

Key Features

• 200 Amp service-entrance rated automatic transfer switch + main breaker

• 42 breaker spaces; supports up to 60 circuits with tandem breakers

• Single-phase 120/240V operation

• Built-in load management: handles up to 4 HVAC loads without additional hardware

• Service disconnect breaker included; can serve as main panel where permitted

• Flush mount NEMA 1 steel enclosure (indoor rated) with powder-coated finish

• Compatible with standard 1-inch breakers from Siemens, Murray, Square D, Eaton; accepts GFCI, AFCI, tandem breakers

• Open-transition type switch (utility disconnected before generator powers loads)

• Specs approx: 59.1 in H × 14.4 in W × 7.1 in D; weight around 64 lb

• Rated for use with Generac standby generator controllers for sensing, timing, and automatic operation

• 5-year limited warranty

RXG42SHA1 Specifications Sheet
RXG42SHA1 Warranty