Cummins RA112L1 100A Non-Service-Entrance Automatic Transfer Switch
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At a glance
- Type
- Integrated Automatic Transfer Switch + Load Center (not a generator)
- Amperage
- 100 A
- Poles
- 2-pole
- Voltage
- 120/240V
- Phase
- Single-phase, 60 Hz
- Service Entrance Rated
- No
- Enclosure
- NEMA 1 (indoor only)
- Load Center
- 20-space (up to 24 circuits with 4 tandem breakers)
- Dimensions
- 24 in L x 17 in W x 7.4 in H
- Weight
- 33 lbs
- Transition
- Open transition (break-before-make)
Not sure if this fits?
Why this generator
- 100-amp automatic transfer switch and 20-space load center combined in a single space-saving NEMA 1 indoor enclosure
- Mechanically interlocked contactor with long-life silver-alloy contacts that resist burning and pitting
- 120/240V single-phase, 2-pole design with full current-rated neutral bar standard
- Open-transition switching (under 100 ms) ensures both power sources are never connected simultaneously
- Supports up to 24 circuits using 4 tandem breakers, ideal for residential and light-commercial standby systems
- UL/CSA listed (UL 67, UL 1008, CSA C22.2) for code-compliant installation
Everything you need to know
100A, 240Vac, 2-Pole, NEMA 1 enclosure, 24 Circuit Load Center (For Cummins Connect Series Generators Only)
Highlights
- Factory-authorized Cummins dealer
- MAP pricing — no hidden markup
- Whole-home standby coverage
- Expert sizing & installation available across NC & SC
Part Number: A051C991
Ships via calculated freight — shipping shown at checkout (heavy/hazmat item).
Frequently asked questions
Is this a genuine OEM part?+
Yes — sold and shipped as a genuine Cummins 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. Typically ships in less than 2 weeks.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Genuine Cummins part
Sold and shipped as a genuine Cummins OEM part from a factory-authorized dealer. 30-day returns on unused parts in original packaging.