I have a Genarac 7500 watt portable generator. When the power cord is plugged in to 220 AC outlet on the generator and the other end is plugged into my transfer switch the power at my house appears to be only getting 110 AC. Some 110volt things in the house work but not all and nothing 220 volts works as it did before. I realize with only 8000 watts the system has to be managed but in this case even one 220 AC doesn't work when there is no others demands.

SOURCE: Bought new XP8000e

Most people don't buy a transfer switch because they cost almost as much as the generator. Lowe's sells a very inexpensive one that will work for most people. It is made by GE and costs $92. Lowe's Item #: 42210 Model: TM860S. Good for 60 amps and 8 circuits. It takes standard GE half size breakers but includes the 60 amp main breakers (which are also standard but make use of a novel device that ensures you can't send power back up the pole). It's a great little design and if a breaker ever fails, you can get a replacement at Lowe's or Home Depot.

Joe

SOURCE: Generac Guardian 15kW Generator

That sounds just about right, if the relay contacts get welded together it sometimes takes out the driver on the printed circuit board. As you found out, 12vdc from 23 to 194 makes the transfer switch move to the Generator position, relay not energized makes the ATS move to the Normal position.

You can make a nice test function by installing a 10 amp contact switch in series with either the N1 or N2 terminals. When the switch is open the generator thinks the Normal power has failed.

Regards,
Carl

SOURCE: Generac 4456 does not start on power loss

I install and work on these everyday. If you hooked up the transfer switch you probable have a control wire wrong. check the utility power sense wire. That lets it no when to start in auto. it could be a relay or fuses. or a control board.

Mark

• 704 Answers
• Posted on Aug 07, 2009

SOURCE: Generator Transfer Problem

There isn't much you can do with servicing the generator set or transfer switch unless you've got lots of experience in diagnoising semi-conductors and electronic components.

Depending on the age of the system, it would be benificial to have a qualified service tech take a look at it.

As an electrician, I've installed several back up generator sets in homes for customers and have had a few of these automatic transfer switches with intermittent operation issues. Sometimes it's the switch and other times it's the Generator that is causing the problems.

Hope this helps, and best regards!

SOURCE: When utility power goes out, the transfer switch doesn't transfer

Call an electrician.