Generac 400 Amp 3-Phase Smart Transfer Switch RTSN400G3 | 120/208V NEMA 3R
Commercial-Grade Automatic Power Transfer for Three-Phase Systems
The Generac RTSN400G3 400 Amp Smart Transfer Switch delivers reliable, automatic backup power protection for commercial buildings, light industrial facilities, and large multi-family properties with 3-phase electrical service. Engineered for 120/208V three-phase systems, this service-rated transfer switch ensures seamless utility-to-generator transitions that keep your business operational during outages.
Built for Demanding Commercial Applications
Three-phase power is the backbone of commercial operations—from HVAC systems and elevators to manufacturing equipment and data centers. The RTSN400G3 is purpose-built to handle these critical loads with intelligent switching technology that protects sensitive equipment while maximizing generator efficiency.
Key Features & Specifications
- 400-amp service rating – handles substantial commercial electrical demands
- 120/208V 3-phase configuration – designed specifically for commercial three-phase systems
- Smart load management – prioritizes critical circuits and optimizes generator capacity
- Automatic operation – instant power transfer with no manual intervention required
- Service-rated design – can function as your main electrical disconnect
- NEMA 3R weatherproof enclosure – outdoor-rated for harsh environments
- cUL listed – meets rigorous Canadian and US safety standards
- Generac-engineered integration – seamless compatibility with Generac standby generators
Ideal for Commercial & Industrial Applications
- Office buildings and business parks
- Retail centers and shopping complexes
- Multi-family residential buildings and apartment complexes
- Medical and dental offices
- Light manufacturing and warehouse facilities
- Data centers and server rooms
- Restaurants and food service operations
- Any facility with 3-phase electrical service requiring backup power
Intelligent Power Management
Unlike basic transfer switches, the RTSN400G3 features smart load shedding technology that automatically manages power distribution during outages. This ensures your most critical systems—like HVAC, refrigeration, security, and communications—stay online while optimizing your generator's fuel efficiency and runtime.
Professional Installation Required
This commercial-grade transfer switch must be installed by a licensed electrician familiar with three-phase systems and local electrical codes. Professional installation ensures safe, code-compliant operation and proper integration with your Generac standby generator.
Protect your business continuity and revenue with enterprise-grade backup power technology.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Generac 400 Amp 3-Phase Smart Transfer Switch RTSN400G3 | 120/208V NEMA 3R
Commercial-Grade Automatic Power Transfer for Three-Phase Systems
The Generac RTSN400G3 400 Amp Smart Transfer Switch delivers reliable, automatic backup power protection for commercial buildings, light industrial facilities, and large multi-family properties with 3-phase electrical service. Engineered for 120/208V three-phase systems, this service-rated transfer switch ensures seamless utility-to-generator transitions that keep your business operational during outages.
Built for Demanding Commercial Applications
Three-phase power is the backbone of commercial operations—from HVAC systems and elevators to manufacturing equipment and data centers. The RTSN400G3 is purpose-built to handle these critical loads with intelligent switching technology that protects sensitive equipment while maximizing generator efficiency.
Key Features & Specifications
- 400-amp service rating – handles substantial commercial electrical demands
- 120/208V 3-phase configuration – designed specifically for commercial three-phase systems
- Smart load management – prioritizes critical circuits and optimizes generator capacity
- Automatic operation – instant power transfer with no manual intervention required
- Service-rated design – can function as your main electrical disconnect
- NEMA 3R weatherproof enclosure – outdoor-rated for harsh environments
- cUL listed – meets rigorous Canadian and US safety standards
- Generac-engineered integration – seamless compatibility with Generac standby generators
Ideal for Commercial & Industrial Applications
- Office buildings and business parks
- Retail centers and shopping complexes
- Multi-family residential buildings and apartment complexes
- Medical and dental offices
- Light manufacturing and warehouse facilities
- Data centers and server rooms
- Restaurants and food service operations
- Any facility with 3-phase electrical service requiring backup power
Intelligent Power Management
Unlike basic transfer switches, the RTSN400G3 features smart load shedding technology that automatically manages power distribution during outages. This ensures your most critical systems—like HVAC, refrigeration, security, and communications—stay online while optimizing your generator's fuel efficiency and runtime.
Professional Installation Required
This commercial-grade transfer switch must be installed by a licensed electrician familiar with three-phase systems and local electrical codes. Professional installation ensures safe, code-compliant operation and proper integration with your Generac standby generator.
Protect your business continuity and revenue with enterprise-grade backup power technology.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
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