T@B 400 how to connect up a generator safely

@Saxon, it depends on whether you have an electrical management system (EMS) connected (i.e., hardwired inside your trailer, or a portable type surge guard/protector between the campground 30-amp pedestal and your trailer.

If you are not using an EMS, you can plug your trailer directly into the generator.

However, if you are referring to using a generator like Honda or Yamaha, and you DO have an EMS, you likely will need a "Neutral-Ground Bonding Plug."  I made my own (easy to do), but you can buy one on Amazon (inexpensive.)

Some generators have an internal N-G bond.  If so, you don't need the N-G plug.  The below article will help you understand why and when it is necessary, and how you can make one.

https://rvelectricity.substack.com/p/diy-generator-bonding-plug?utm_source=substack&utm_medium=email

I have a Honda 2000i (inverter) generator.  I plug the N-G Bonding Plug into one of the two available 120V AC outlets on the generator.  I then use a 30-Amp to 15-Amp "dog bone" adapter to connect the trailer 30-Amp cord/plug into the other 120V AC outlet on the generator.  After doing that, I fire up the generator and I'm good to go.  I have a hard-wired "Progressive Dynamics" EMS, so it takes a few seconds for it to confirm the power connection is good, then I have full power to the trailer.

I agree with @AnOldUR.  I should have noted that I let the generator run for about a minute or so (depends on the ambient temperature) to warm up, and then I plug the dog bone connection into the generator.  I run the Honda generator using the "eco" mode to reduce the generator noise significantly.