ASCO 185 Series Automatic Transfer Switch | SERVICE ENTRANCE RATED | 2 Wire Start | 400A | NEMA 3R

ASCO 400 Amp Automatic Transfer Switch Nema 3R

The ASCO 185 Series 400A Automatic Transfer Switch is a service entrance rated, outdoor-ready solution designed for larger residential and light commercial backup power systems. Compatible with any 2-wire start generator, it ensures automatic, seamless transfer between utility and generator power during outages—keeping critical systems running without interruption.

An ATS like this is essential for high-demand setups, offering both safety and convenience when utility power fails.

Why choose this 400A Service Entrance Rated Transfer Switch?

• Handles higher electrical loads for large homes or commercial buildings

• Service entrance rated—includes main circuit breaker for code compliance

• NEMA 3R enclosure for durable outdoor installation

• Works with all 2-wire start standby generators

• Supports automatic weekly generator exercise cycles

Ready to purchase an ASCO 185 Series 400A ATS? Request a quote online for accurate pricing and shipping.