Reading outlet voltage

[bskomp]

Hey everyone newbie here and need help and a lot of time to read all the info on this forum. I've been reading about voltage drop and warning's online. But here's the thing I know just enough about voltage and amp to get in trouble or break something. However i do try to careful.

With all that being said I have a ? that I just can't' get a straight answer on. Answer on Will my a/c unit make a outlet drop below 20% voltage reading? I've seen drops as low as 102 last night. So just shut it down. I just bought this camper it's set up in a park that's been around. So wiring is old the camper is 09 model and has been on site for three years now so I'm not sure the amount of abuse that the a/c has encountered. I had the handy man come out last night and change lugs in 30amp post and install new breaker. Came on and worked for a bit hen went right back to surging again reading's dropped to 103-109 for a short period then tripping breaker. So Now I'm worrying if it has already killed a/c unit.

Just wanted to make sure it's not my a/c unit before I call him back and worry him over my ignorance or him pointing the finger /blame on my camper. Sorry for long post but high temps with pups/kids got to get to bottom of this. Thanks guys for any thoughts/info.

[westend]

Do you have any of the other high watt devices like water heater, converter charging a low battery, etc. running? Maybe you could try switching off all your loads and see what your voltages are with just the AC running.
How are you measuring voltage?

[D___M]

Take a look at this website that explains RV wiring. It may help you find the knowledge that you seek.