Originally Posted by Snapcap3
I ran it today with and without the Surge Guard. There doesn't seem to be that much difference in voltage. Without the guard voltage is 117.5 vac and 109 when fan and compressor are running. With surge 117.5 and 108.6. This is on a 20amp circuit. Compressor seemed to work as it should....baffled
I think the 44270 is supposed to blow when spiked. It's non-repairable.
The voltage at the air conditioner is the issue. A 9 volt voltage drop is much more than expected and the 108.6 volts is possibly enough to prevent the compressor from starting. You have measured at an outlet. I will assume it is an outlet inside the TT. Even so, the voltage at the compressor may be a little lower.
The garage outlet you connected the TT to may cause the voltage drop.
The surge protector is probably not the culprit. It only causes a 0.4 volt drop. It does however contribute to the accumulated losses.
The adapters used may be the culprit.
The TT 30 amp cord may be the culprit.
The service entrance in the TT may be the culprit.
All of those things together may be the culprit.
Measuring at points along this path will possibly isolate the cause or indicate you have too many plugs, cords, and sockets in the circuit. Use the same adapters and cords you use at campgrounds where the issue occurred.
Assuming all other appliances in the TT are "off" a 13 amp draw by AC should not cause a 9 volt drop. A 9 volt drop at 13 amps is 117 watts of power being dissipated in the line and connectors. That is enough power to run a large incandescent light bulb. Adding other appliances will further lower the voltage. I have an electric water heater that would easy double the voltage drop. When it is turned "on" I never know when it has cycled on or off. What else might be drawing power?
I wish you good luck and happy trails ahead!