AC voltage and line loss

wa8yxm wrote:
30 amps you are doing well if you can run both A/C.

If you are seeing that much voltage drop between your Surge Guard and your INdoor Voltmeter.. Let me make an assumption

Park---Hughes autoformer---Surge guard---RV

IF that is how you are set up then do the following

First with the RV not plugged into the surge guard compare the surge voltage reading to the volt meter's reading. You may find a difference. if so you need to figure out which one is right.. Though I DO know how to calibrate a volt meter or check calibration.. Too detailed to describe here. Plus you need a calibrated source I have one but.. Well.

Now if the meters agree Take a look at your power plug. are the blades Bright and shiny or black as knight? (this is mostly the 30 amp plug) Not so much 50s) Dirty/tarnished plugs drop voltage. they also tend to MELT at full power load.

But that is way too much loss between Surge Guard and inside outlet.

Thanks everyone for the help!! I am seeing about a 4v line loss on the internal volt meter per AC running. It’s been 118 here for the last couple days so it’s been a while since I’ve checked it without them running but it should be pretty close to the surge guard when they are off. Is that normal line loss per AC? Thanks