Furnace shuts down generator
I have installed a 16kW standby generator and I am having a problem with the furnace. It is a 10kW furnace and the rest of the generatoris running lights, outlets and a well pump. When the generator starts, everything is fine. Then about five minutes with the generator running, it trips the 65 Amp breaker inside the generator housing. I can run the lights, outlets and well pump by itself with no problem, but can't run the furnace without shutting down the generator. The furnace is 240V on a 50A 2 pole breaker. It will not trip this breaker. The generator main is a 70A breaker. This is the third one I have installed. The other two have no problems. Could the 65A breaker be faulty? Please help. Thanks, I have been looking at different questions on this site, and I have liked what I have seen so far.