I need an education about coach electrical power and what actions I could take if we find ourselves in a similar situation in the future. Over Memorial Day weekend we were in a full campground connected to 50A service. During the late afternoon, all power in the coach would intermittenly drop for 30-40 seconds, reappear for 5 minutes or so, then again drop. Looking at the Aladdin system, it would report 115V on one leg, dropping to 109V while the other leg would report 109V dropping to 102V. I tried the pedestal 30A service with no changes to the symptoms as whenever any leg reported 102V, power would drop in the entire coach, then reappear 40 seconds later. The Aladdin would report losing a source of power. During all this, I was only running one A/C, the TV and the refrigerator. None of the readings from the Aladdin suggested I was ever drawing over 18A. After the peak A/C demand time (later in the evening or early in the morning) all systems would work fine. I talked to the campground owner and they didn’t have any other reports of similar issues. Obviously I was experiencing a low voltage situation and “something” was dropping offline until voltage once again crossing some threshold. This is where I need an education. Where does the Aladdin measure the voltage? Is it on the service entry side to the coach or on the output of the surge protector/transfer switch? If I had taken readings at the pedastal, would I have seen the low voltage? Any ideas what that “something” was that was dropping power in the coach? Does the threshold where we lost power sound correct? Were there any actions I could have taken to avoid being in this predicament? And what potential damage may have been done to the coach and what should I be looking out for?
As always, many thanks for your thoughts.