FREQUENTLY ASKED QUESTIONS
A Transfer switch is the link between your backup generator, the utility company, and your home or business. It's job is to safely connect your home or business to your backup generator during a power outage. A properly installed transfer switch will isolate your generator from the utility company's power lines, protecting the power companies workers from harm. A transfer switch is required by law in all 50 states, and is an essential piece of safety equipment.
The National Electrical Code requires that all manual and automatic transfer switches be UL-1008 listed by Underwriters Laboratories, and carry the UL-1008 label. This is in annex A of the 2002 National Electrical Code.
If a transfer switch meets this tough safety standard, and has been certified by Underwriters Laboratories, it will carry the UL-1008 label. This label will clearly say one of the following:
All ASCO transfer switches are UL listed for their intended application.
With a manual transfer switch, when the power goes out, you need to start your generator, and connect it to the transfer switch. You then need to switch your house over to generator power. When the utility power is restored you need to switch your house back to utility power, and turn off your generator.
With a automatic transfer switch, everything is fully automatic. When the utility power goes out, the transfer switch signals your generator to start. Once the generator is running the transfer switch automatically connects your home or business to the generator. When the utility power is restored, the transfer switch reconnects your home or business to the utility. Then it turns off your generator and waits patiently for the next power outage.
We recommend that you use a ASCO series 185 MANUAL TRANSFER SWITCH with your portable generator. An Automatic Transfer Switch is designed for use with a permanently installed standby generator.
A "SERVICE ENTRANCE DISCONNECT" is a device that interrupts excessive current, and allows for manually disconnecting your home or business from the electric utility. It is generally a circuit breaker that is either part of your utility meter base, or is part of your main panel. It could also be called your "main breaker". It is required by Article 230 of the National Electrical Code to be as close as possible to the utility meter. Please click here to view the applicable excerpts from the NEC
When installing a transfer switch that will supply power to your entire home, the transfer switch needs to be installed between the "SERVICE ENTRANCE DISCONNECT" and the main distribution panel. If your home utilizes a main breaker that's part of the main distribution panel, then you'll need to have a "SERVICE ENTRANCE DISCONNECT" installed, either separately, or as part of a "SERVICE ENTRANCE RATED" transfer switch.
The easiest cheapest solution is to buy a "SERVICE ENTRANCE RATED" transfer switch. The ASCO series 185 and series 300 Automatic Transfer Switches are available in a "SERVICE ENTRANCE RATED" version that meets all national and local code requirements.
This would depend on your configuration. If you have a 400 amp "SERVICE ENTRANCE DISCONNECT" which would be a single breaker that will disconnect your entire home, then it's easy to go with a 400 amp ATS. Just have it installed between the 400 amp "SERVICE ENTRANCE DISCONNECT", and the distribution panels. There's plenty of connector space on a 400 amp switch to land both sets of cables.
If you don't have a 400 amp "SERVICE ENTRANCE DISCONNECT", then you can either purchase a single 400 amp or two 200 amp "SERVICE ENTRANCE RATED" Automatic Transfer Switches.
We guarantee that the ASCO automatic transfer switches will interface properly with your Onan 3 wire start system, and will supply customers with connection instructions as part of your purchase.
The ASCO series 185 Automatic transfer switch, with accessory 105G is designed to work properly with any model of Generac Guardian permanently installed generator air cooled generator. The Generac liquid cooled generators are factory compatible with a standard 2 wire start signal.
If you want to run your entire house in case of a power outage, and you have a large enough generator, you need a transfer switch that is the same rating as your main breaker panel. For a home this will normally be either 100 or more likely 200 amps. The transfer switch would be installed between your main breaker (normally at the meter) and your main electrical panel. Some homes have a 400 amp service utilizing two distribution panels, in which case you'll need two 200 amp or one 400 amp Automatic Transfer Switch.
If you want to run only certain loads during a power outage you can install a sub panel off of your main panel and use a 100 amp transfer switch. This is a great idea if you don't have a generator big enough to run everything. We even offer a series 185 automatic transfer switch, with a built in load center, that saves space and makes installation easy.
Our home is an excellent example. We have a 200 amp main feed and a 15 KW diesel generator. The generator is big enough for the entire house. During a power outage everything in the house works normally, and we sometimes don't even know there's a power outage going on.
That's easy, we provide a level of technical support that far exceeds most other retailers. We've been designing and maintaining backup power systems for over two decades. In that time we've learned a thing or two about backup power systems. We routinely help customers out with design issues on everything from the simplest home installation, to the most complex mission critical application.
Another very important factor is that we sell the exact same transfer switches for much less money. In many cases hundreds and even thousands of dollars less. We offer great prompt customer service, and the exact same warranty you'll receive from any other ASCO dealer. We have what you want in stock, and we'll ship it today.
Your transfer switch needs to be installed by a licensed electrician, and the installation needs to be in compliance with all local and national codes. This is not a do it yourself job. Please hire a licensed electrician that will do the job right.
If you place your order before 09:00AM Pacific Time Monday through Friday, we can generally ship your switch that day. Otherwise we'll ship it on the next business day. We'll e-mail you a UPS or trucking company tracking number (depending on the size of switch you order) the day after your switch ships.
We have been in business in the same location since 1999. We are a Dunn & Bradstreet rated corporation, and can supply credit and bank references to other corporations upon request.
We are an authorized dealer for any products we sell. We only buy direct from the factory, and never sell used, "grey market" or surplus equipment.
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