MODEL: OTEC125 (SPEC C) - A075F124 | 120/208V 3-Phase | NON-SERVICE RATED | NEMA3R ENCLOSURE
Cummins 125A Non-Service Rated Transfer Switch
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Reliable Emergency Power Transfer for Commercial Applications
The Cummins OTEC125 Spec C transfer switch delivers dependable automatic power transfer when your facility needs it most. Engineered for commercial and light industrial environments, this 125-amp, three-phase transfer switch seamlessly monitors your primary power source, starts your generator, and transfers loads during outages—keeping your operations running without interruption.
Now featuring the enhanced PowerCommand® 40-11 control with intuitive LCD display and software-enabled settings for faster installation and precision configuration.
Why Choose the OTEC125?
Smart Microprocessor Control
The integrated PowerCommand® 40-11 control gives you complete visibility and control over your emergency power system. The digital LCD display and tactile soft-switches make operation simple, while comprehensive monitoring ensures you're always aware of system status.
Advanced Linear Motor Actuator
Unlike traditional gear-driven switches, the OTEC125 uses a bi-directional linear motor actuator that delivers smooth, friction-free transfer action with constant force. This advanced mechanism reduces wear, increases reliability, and ensures consistent performance over thousands of transfer cycles.
Built for Easy Service
- Plug connections eliminate hardwired control panels
- Door-mounted controls provide instant access without opening the enclosure
- Spacious interior layout simplifies wiring and maintenance
- Clear terminal markings reduce installation time and errors
Safety-First Design
Dual mechanical and electrical interlocking prevents dangerous source-to-source connections, protecting your equipment and personnel. The manual operating handle allows safe switching under de-energized conditions when needed.
Technical Specifications
- Voltage: 120/208V, 3-Phase
- Current Rating: 125 Amperes
- Enclosure: NEMA3R (Weather Resistant)
- Service Rating: Non-Service Rated
- Control: PowerCommand® 40-11
- Series: OTEC (Spec C)
- Dimensions: 34" H × 26.5" W × 12.5" D
- Weight: 229 lbs
Codes and Standards
- UL - UL 1008 Listed with UL 50E Type Cabinets and UL Listed CU-AL terminals.
- NEMA - Compliance with NEMA ICS 10.
- CSA - Certified to CSA 22.2.
- IEEE - Compliance with IEEE 446 for Emergency and Standby Power Applications.
- NFPA - Compliance with NFPA 70, 99, and 110 (Level 1).
- NEC - Suitable for use in Emergency, Legally Required Standby and Critical Power Systems per NEC 700, 701, 702, and 708.
- EMC - Meets Electromagnetic Compatibility (EMC) standards for Generic Immunity and Emissions Standards for Industrial environment.
- IBC - Certified to IBC Seismic 2021.
Ideal Applications
- Emergency Power Systems – Hospitals, data centers, emergency services
- Legally Required Standby – Exit lighting, fire alarms, emergency ventilation
- Optional Standby Circuits – HVAC systems, elevators, security systems
- Commercial Buildings – Office buildings, retail centers, warehouses
- Light Industrial Facilities – Manufacturing plants, food processing, distribution centers
What's Included
- OTEC125 Automatic Transfer Switch with NEMA3R weatherproof enclosure
- PowerCommand® 40-11 digital control with LCD display
- Manual operating handle for emergency use
- Installation and operation manual
- Cummins factory warranty
Order with Confidence
Model: OTEC125 (Spec C)
Manufacturer: Cummins Power Generation
Condition: New
Need help sizing your transfer switch or have questions about compatibility with your generator? Our power systems specialists are here to help. Contact us today for expert guidance on your emergency power project.
Cummins OTEC series transfer switches are UL Listed and meet all applicable NEC and NFPA standards for emergency and standby power systems.