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)
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?+
Shipping is 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
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 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.