Generac RXG42SHA1 200A 42-Circuit Load Center Service-Entrance Automatic Transfer Switch (NEMA 1)
warranty
dealer
support
At a glance
- Amperage
- 200A (200A main circuit breaker)
- Voltage/Phase
- 120/240V, single-phase
- Service Entrance Rated
- Yes
- Enclosure
- NEMA 1 (indoor), flush-mount steel with baked powder-coat finish
- Circuits
- 42-space load center, expandable to 60 circuits with tandem breakers
- Transition Type
- Open transition, automatic (service rated)
- Listings
- ETL listed for service equipment and consumer safety
- Withstand Rating
- 10,000A (22,000A with Siemens or Murray 1" branch breakers)
- Lug Range
- #1 - 300 MCM CU/AL 75 C
- Load Management
- 4 individual HVAC loads (24 VAC) standard; up to 8 with optional Smart Management Modules
- Dimensions
- 59.09" H x 15.5" W x 4.81" D
- Weight
- 64 lb (29.0 kg); 76 lb shipped
- Warranty
- 5-year limited
Why this generator
- GenReady all-in-one panel combines a 200A main breaker, automatic transfer switch, and 42-space load center in a single flush-mount NEMA 1 enclosure
- Service entrance rated, so it replaces your main panel and backs up the whole house with no separate ATS to install
- Built-in load management handles up to 4 HVAC loads standard (expandable to 8 with Smart Management Modules) with no extra hardware
- 42 spaces expandable to 60 circuits using tandem breakers, and accepts GFCI, AFCI, and tandem breakers
- Multi-listed for Siemens, Murray, Square D, and Eaton 1-inch breakers for flexible installs and panel upgrades
- ETL listed for service equipment and backed by a 5-year limited warranty
Everything you need to know
Generac RXG42SHA1 200a 42-circuit load center service-entrance automatic transfer switch (NEMA 1 enclosure). 120/240V single-phase, designed to pair with Generac air-cooled home standby generators.
Genuine Generac unit from a factory-authorized dealer. Free shipping to the lower 48. Professional installation available in NC & SC.
Frequently asked questions
Is this a genuine OEM part?+
Yes — sold and shipped as a genuine Generac part from a factory-authorized dealer.
Will it fit my unit?+
Check your model and year — message us with that info and we'll confirm fit before you order.
How fast does it ship?+
Free shipping to the lower 48. Most accessories and parts ship within 2–4 business days.
What's the return policy?+
30-day returns on unused parts and accessories in original packaging.
Free curbside shipping
Liftgate delivery to the lower 48. Most orders leave the warehouse in 3–5 business days.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Real Cummins warranty
Full 5-year / 2,000-hour limited warranty — registered and supported through Cummins directly.