NOTE: ASCO Transfer Switches are special order and may not be returnable.

A Brief History of ASCO

ASCO was founded in 1888 in Baltimore, MD. The headquarters subsequently moved to New York, and the company began making solenoid valves and switches. The use of automatic transfer switches dates to 1925, when they were first used in traffic signal controls. These were made by ASCO. By 1959, the business had expanded to the UK, where the ASCO Switch was in great demand. The company began manufacturing systems for controlling emergency power in 1975. The first-ever generator sensing panel was made by ASCO in 1987. In the 1990s, further technological enhancements were made to ASCO’s automatic transfer switches and intelligent load banks. In 2017, ASCO Power Technologies’ headquarters moved to New Jersey and ASCO Services grew to 135 technicians and 20 salespersons. The company was acquired by Schneider Electric in October of the same year and now has 1400 employees. 

ASCO makes electrical equipment for healthcare facilities, data centers, communication networks, commercial buildings and industrial plants. Today it is the largest transfer switch manufacturer in the world, with 500,000 square feet of manufacturing space dedicated to this product line. Its Services branch offers maintenance programs, modifications, upgrades, and repairs. The "Firetrol" branch offers power transfer switches, controls, and alarms for fire suppression applications. 

ASCO 185 Series Residential Transfer Switches: The most common section of our ASCO transfer switches would surely be the residential 185 series. This section is specifically for generators that tend to be used in residential applications. It has the standard two-wire start and is offered in an outdoor or indoor version for the enclosure. There is also the option to have either a service entrance or non-service entrance model depending upon your needs for the installation. The biggest advantage with the residential series is going to be within the physical size of the unit. ASCO took most of the things that they didn’t feel were necessary and removed them to make this switch as compact as possible. It still has all of the things you’ll need to safely transfer your service back and forth between utility and generator power. Just keep in mind that even though this is technically a residential section that they can be used for light commercial purposes. 

ASCO 300 Series Commercial Transfer Switches: The ASCO 300 series is the complete opposite of its residential counterpart. All of the transfer switches are geared more towards commercial applications. You’ll get added features like the ability to set up a time delay in the event of power loss or you can exercise the unit with/without a load weekly. To your average home owner that might not matter, but for a business it might be important to delay the starting of a unit. The transfer switches themselves are also significantly bigger so that they can accommodate the extra features of the commercial series. You’ll have the same universal compatibility as well as the two-wire start capabilities. The truly unique thing that this series offers lies with the three phase transfer switches. Most of the time when you are installing a three phase transfer switch you’ll have to install your own disconnect. That’s because your typical manufacturer doesn’t offer a three phase transfer switch that is service entrance rated. ASCO, however, is one of the few companies that offers a three phase service entrance transfer switch at an affordable price. Not only can you get them in the service entrance or non-service entrance models, you can also select what voltage you want them at and if you want the switch to be indoor or outdoor rated.

Generator ATS sizes:

• 30A
• 70A
• 100A
• 104A
• 150A
• 200A
• 225A
• 230A
• 250A
• 260A
• 400A
• 600A
• 800A
• 1000A
• 1200A
• 1600A
• 2000A
• 2500A
• 2600A
• 3000A