ASCO Transfer Switch ASCO400A185NSE Details and Specifications
ASCO 400-Amp Automatic Transfer Switch
208V, 240V, 480-Volt 3-Phase 400-Amp ATS Non-Service Rated NEMA 3R Indoor/Outdoor Light Commercial
- Add the ASCO Strip Heater Accessory in cold climates. Prevents frozen condensation inside the cabinet.
400 Amp Transfer Switches ASCO 185 Series
The Non-SE Rated ASCO 100 Amp Generator Transfer Switch Powers essential or critical loads. During a power outage, the 400-Amp 3-phase automatic transfer switch disconnects the essential load panel from the main panel and provides power to the sub-panel from the generator. Only the loads connected to circuit breakers in the sub-panel receive power. The NEMA 3R aluminum enclosure makes the transfer switch suitable for indoor and outdoor installations.
400 Amp Automatic Transfer Switch
ASCO Transfer Switches make sure the power stays on when utility power fails. When utility power returns, the ASCO ATS switches the home or business back to utility power and begins generator cool-down.
Compatible with any two-wire start generator system, The 400 Amp Automatic Transfer Switch monitors the utility power 24/7. When an outage occurs or power quality falls below an acceptable level, the transfer switch starts the generator and waits as the engine warms and the speed stabilizes. Once the generator is ready, the ATS isolates the utility from the sub panel and supplies generator power to the home or business.
400 Amp Transfer Switch
- The time from power failure to restoration is typically less than 30 seconds.
- Automatically switches back to utility power when it returns.
- Generator cool-down cycle before shutdown.
- User friendly control panel.
- Not Rated for Use as a Main Disconnect.
- NEMA 3R Aluminum Enclosure rated for Indoor or Outdoor Installation.
- Available in 208V, 240V, or 480-Volt 3-Phase configurations.
ASCO 185 Features
- Power Status LEDs for Utility and Generator and Transfer Switch Position.
- Double Throw Contacts with Mechanical Locking Isolate Utility from Generator
- UL-1008 Listed and Meets NEC Article 702 Requirements
- 1 or 3 second time delay following outage before startup.
- Compatible with any two-wire start generator.
Briggs & Stratton 3-Year Limited Warranty

