Yes, you can use this transfer switch with a 12000 watt generator if you connect to the 30 amp NEMA L14-30 receptacle on that generator. The 30 amp receptacle will have a circuit breaker that provides over current protection.
This will be easy to do. You can disconnect the L1430F inside the transfer switch and connect to the remote power inlet box with conduit through any one of the knockouts in the transfer switch cabinet. You will probably want to leave the disconnected L1430F in place to fill the opening in the bottom of the cabinet.
Connecting a generator to this Transfer Switch, you'll need a 4-conductor cord/4-prong plug: Line 1, Line 2, Neutral, Ground. That provides 240 Volts L1 to L2, and 120 Volts L1 or L2 to Neutral. Since this Transfer Switch does not switch Neutral, make sure your generator does not bond Neutral to Ground inside it. It probably does. The bond between Neutral and Ground in the generator must be removed to safely use a generator connected to this Transfer Switch.
Answered this already.
I believe that generator would work very well with this transfer switch. Any generator that provides L1, L2, N, and GND conductors would. The fact your generator is 9200 Watts and this transfer switch is rated at 7500 Watts causes no trouble, as long as you abide by the transfer switch's circuit breaker limitations and don't try to swap them out with breakers larger than Reliance Controls specifies for this transfer switch. Warning: if your Champion 9200 generator bonds Neutral to Ground, verify with a licensed electrician that the bond must must be removed before connecting it to the transfer switch, since this transfer switch does not switch Neutral. Home Depot can help get you that answer.
You can but there are no knockouts on the rt side of the switch. If you are short on wire to the service panel you will need to install a junction box. Be sure you pair and label your extension wires correctly .
Depending on the location of your service panel allow app 5 hours for install
Verify you have 240 output at the recep on your generator. More often than not the 3 prong on your gen is 120 volt 30 amp. They typicaly are stated as being rv ready. The 4 prong consists of two 120 volt lines one common and one ground.
What i found with this switch is that all of the single pole circuits are wired with awg 12 . That will sustain a 20 amp load. The 240 volt circuits are wired with awg 10 which will sustain a 30 amp load. So yes you can change the 15 amp breakers to 20 amp breakers.
I checked all the literature and FAQs for Reliance Controls Model 310A, attached, and didn't find your answer. Recommend calling Reliance Controls at 800-634-6155. They have good customer service. http://reliancecontrols.com/ProductDetail.aspx?R310A http://www.reliancecontrols.com/Documents/PT2%20Loadside%20Installation%20and%20Operating%20Instructions.pdf http://reliancecontrols.com/Support.aspx?faq