Originally Posted by GWoods
2010 Lexington with something I have never seen. No place on coach to plug in shore power cord. Just start generator, wait for short time and relay(?) connects generator to coach. My question is: is it safe to run the generator while connected to shore power? The generator needs work that will involve several start/stops and I would like to keep the coach plugged in.
Your post is not clear. What does this mean? "No place on coach to plug in shore power cord"
Next you ask is it safe to run generator when shore power is connected. Either there is a shore power cord or there is not.
Assuming there is a shore power cord, it is usually safe to plug in and also run the generator at the same time. This is not certain as some owners modify their systems.
There should be an automatic transfer switch (ATS) that switches between generator and shore power. The ATS only allows one AC power source to connect at one time. The ATS may be generator priority or shore power priority, but only one will be connected.
That said, switching between shore and generator while under load causes contact wear inside the ATS. Some ATS's withstand this better than others. Frequently switching from one power source to another while under load is almost always going to lead to future ATS failure.
Some ATS's have a built in delay. It will disconnect one system and pause before engaging the other or it will pause before disconnecting the generator and connecting shore power. Switching under load is still likely to be an issue.
Get the manual for make and model of your ATS and read operating instructions. The manual may require turning shore power off before starting the generator. The reverse may also be true.