Cummins RA 400 NSE (A050W633): Specs & Datasheet
MPN: RA 400 NSE (A050W633)The Cummins RA 400 NSE (A050W633) is a 400-amp, 240V single-phase automatic transfer switch for large residential, commercial, and industrial backup power. Searches for “cummins ra400nse 400a 1ph-120/240v” point at exactly this unit — published specifications below.
The RA series is Cummins' workhorse single-phase ATS line: on utility failure the switch starts the paired Cummins generator and transfers the load automatically, then returns to utility when power stabilizes. The non-service-entrance configuration installs downstream of the main disconnect, which makes it a straightforward retrofit in existing 400 A services. UL 1008 listing and NEC/NFPA compliance keep it inspection-ready for permitted standby installations.
Specifications
| MPN | A050W633 |
|---|---|
| Amperage | 400 A |
| Voltage | 240V |
| Phase type | 1-phase |
| Transfer type | Automatic |
| Service rating | Non-Service Entrance (NSE) |
| Compatibility | Cummins backup generators |
| Certifications | UL 1008, CSA; NEC/NFPA compliant |
Compatible With / Used In
- Cummins backup generator sets — easy integration for automatic utility-to-generator transfer
- Large residential, commercial, and industrial services — 400 A capacity without service-entrance requirements
- Installations downstream of the main disconnect — NSE configuration
Datasheet Availability
Cummins RA-series specification documentation is supplied with every quote — call (502) 790-0600. Manufacturer resources: cummins.com/generators.
View the RA 400 NSE (A050W633) product page →
Frequently Asked Questions
What are the specs of the Cummins RA400NSE 400A 1ph 120/240V?
The RA 400 NSE (A050W633) is rated 400 A, 240V, 1-phase, automatic transfer, non-service entrance, UL 1008 listed and NEC compliant, designed for Cummins backup generators.
What does NSE mean on the Cummins RA 400?
Non-Service Entrance — the switch installs downstream of the main service disconnect, so no service-entrance certification is required.
Is the Cummins RA 400 suitable for residential use?
Yes — it serves large residential, commercial, and industrial installations that need 400 A automatic backup power transfer.
Is the Cummins RA 400 NSE in stock?
Yes — in stock at Portlandia Electric Supply. Call (502) 790-0600 for pricing and lead time.
Specifications sourced from the manufacturer listing data maintained by Portlandia Electric Supply. Where a value is not published, it is marked as such — we do not estimate specifications. Questions: call (502) 790-0600. Portlandia Electric Supply, Louisville, KY — 12+ US distribution hubs.