The Cummins RA412N3 400 Amp Non Service Entrance Automatic Transfer Switch provides high-capacity standby power management for whole house residential and light commercial applications. This professional-grade system continuously monitors your utility power lines 24 hours a day, 7 days a week, automatically signaling your generator to start and shifting the electrical load the moment utility power becomes unreliable or fails.
Engineered as a high-capacity 2-Pole Switch for 120/240V Single Phase Cummins Generators, this unit integrates smoothly with Cummins Quiet Connect air-cooled standby systems. It features a reliable Break-Before-Make transition mechanism that breaks the connection to utility lines before the connection to generator power is securely established. Safe operation is reinforced by a heavy-duty mechanical interlock and electrical interlock control wiring to eliminate any risk of simultaneous emergency and normal contact closing.
Built for maximum outdoor durability and quiet operation, the mechanical contactor features long-life high-pressure silver-alloy contacts that resist burning and pitting. The complete assembly is mechanically held in both normal and emergency positions for silent standby performance, housed entirely within a lightweight Aluminum Enclosure NEMA Type 3R Rated certified for versatile indoor or outdoor installation.
Key Features
- Cummins RA412N3 400-Amp Whole House Automatic Transfer Switch
- 2-Pole Switch for 120/240V Single Phase Cummins Generators
- Break-Before-Make Isolates Generator Power from Utility Power
- Mechanical Interlock Prevents Simultaneous Closing of Emergency and Normal Contacts
- Electrical Interlock Control Wiring Prevents Simultaneous Connection to Emergency and Normal Power Sources
- Long-life high-pressure silver-alloy contacts resist burning and pitting
- Mechanically held contacts in normal and emergency positions for quiet operation
- Aluminum Enclosure NEMA Type 3R Rated for Indoor/Outdoor Installation
- Cummins 2-Year Limited Warranty
Specifications
| Brand | Cummins |
|---|---|
| Series Name | RA |
| Model Number | RA412N3 - P/N A050W633 |
| Product Type | Automatic Transfer Switch |
| Voltage | 120/240 Volts Single Phase |
| Voltage Filter | 120/240 Volts |
| Transfer Switch Amps | 400 Amps |
| Transfer Switch Circuits | Whole House Switch |
| ATS Poles | 2 Pole |
| Enclosure | NEMA 3R Aluminum Indoor/Outdoor |
| UL Listed | UL-1008 |
| Dimensions | 36.9H x 24.9W x 11.1D Inches |
| Transfer Switch Weight | 64.5 lbs |
| Fuel Gauge | No |
| Made In USA | Yes |
| Warranty | Cummins 2-Year Limited Warranty |