Generac RXG42SHA1 200A 42-Circuit Load Center Service-Entrance Automatic Transfer Switch (NEMA 1)
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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
Not sure if this fits?
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. Ships via calculated freight — shipping shown at checkout (heavy/hazmat item). 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?+
Low cost ground shipping — calculated at checkout (batteries, transfer switches and oversized items). Most leave the warehouse in 2–4 business days.
What's the return policy?+
30-day returns on unused parts and accessories in original packaging.
Fast nationwide shipping
Low cost ground shipping — calculated at checkout. Most items leave the warehouse in 2–4 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.
Genuine Generac part
Sold and shipped as a genuine Generac OEM part from a factory-authorized dealer. 30-day returns on unused parts in original packaging.