Generac 400A Service Rated Automatic Transfer Switch 120/240V 1� NEMA 3R with Digital Power Management

Generac 400A Service Rated Automatic Transfer Switch 120/240V 1� NEMA 3R with Digital Power Management

Professional Automatic Power Transfer & Load Management

The Generac 400A Service Rated Automatic Transfer Switch delivers reliable backup power management for single-phase applications up to 48kW. Housed in a durable aluminum NEMA 3R enclosure with electrostatically applied powder coating, this UL listed transfer switch features Digital Power Technology (DPM) for advanced HVAC load control and Smart Management Module compatibility for comprehensive power management solutions.

Professional Features & Benefits

• 400 Amp Service Rating: Handles substantial electrical loads for comprehensive backup power coverage in residential and light commercial applications.
• Digital Power Technology (DPM): Manages up to 4 individual HVAC loads with 24 VAC control without additional hardware, optimizing generator capacity utilization.
• NEMA 3R Aluminum Enclosure: Weather-resistant construction with powder-coated finish ensures reliable outdoor installation and long-term durability.
• Heavy Duty Generac Contactor: UL recognized switching device engineered for years of dependable service and reliable load transfer operations.
• Smart Management Module Compatible: Expands load management capability to 8 loads when used with Smart Management Modules for maximum installation efficiency.
• Single-Phase 120/240V Design: Optimized for generators 60kW and below, providing versatile compatibility with residential and small commercial backup power systems.
• UL Listed Certification: Meets rigorous safety and performance standards for professional electrical installations.

Technical Specifications

• Amperage: 400 A
• Assembled Weight: 130 lbs
• Color Finish: Grey
• Country Of Origin: United States
• Department: Electrical
• Installation Hardware Included: transfer switch
• Installation Instructions Included: Yes
• Manufacturer Warranty: 5 year limited
• Material: Aluminum
• Maximum Generator Input: 48000 W
• Overall Depth: 17 in
• Overall Height: 52 in
• Overall Width: 25 in
• Product Group: Power Distribution
• Product Subgroup: Transfer Switch
• Product Voltage: 120 V
• Restrictions: No
• Weight: 130 lbs

Installation & Operation

1. Mount the unit in a suitable location with appropriate clearance and access for connections and service.
2. Connect utility and load conductors following applicable guidelines and the manufacturer's instructions.
3. Wire generator or power input according to the provided voltage/phase specifications and compatible capacity.
4. Configure any available load management or control features as supported by the provided specifications.
5. Test automatic transfer or operational functionality and verify proper performance before placing into service.
6. Complete final inspection and follow ongoing maintenance practices appropriate to the product category.

Professional Applications

• Residential Backup Power Systems
• Small Commercial Facilities
• Multi-Unit Properties
• Professional Offices
• Retail Establishments
• Light Industrial Applications
• Emergency Services Facilities

Smart Load Management Advantage

The integrated Digital Power Technology (DPM) provides intelligent HVAC load control capabilities, managing up to 4 individual 24 VAC controlled loads without additional hardware. When combined with Smart Management Modules, the system expands to manage up to 8 loads total, delivering the most installation-efficient power management options available for optimized generator utilization and seamless backup power operation.

Why Choose Generac Quality?

Generac delivers proven reliability with this UL listed transfer switch backed by a comprehensive 5-year limited warranty. The heavy-duty aluminum construction with NEMA 3R rating ensures dependable performance in demanding outdoor environments, while the precision-engineered contactor provides years of reliable service for critical backup power applications.