Electrical

wa8yxm wrote:

Rickster2 wrote:
I’m having trouble with the refrigerator compressor in the camper shutting down periodically with one A/C unit running and am being told the “energy management system” is shutting it down because a 30 amp service is not enough. If I attach the camper to a single 30 amp breaker, will this help the situation. I find it hard to believe a 30 amp service will not sufficiently operate one A/C unit and the refrigerator but am not an electrician so asking for advice. Thank you in advance

You need to understand how the Energy Manager (I assume it's an Intelletec) works... It is not voltage that shuts things down it is current. Now.. here is how it works on a 50 amp RV.
If you are plugged into True 50 amps service (two legs L-1 and L-2 120 volt either leg to neutral and 240 volt leg to leg) the EMS sees the 200+ leg to leg (not sure what the cut off is) and says "Oh 50 amp service.. Snooze time) (It shuts down and does nothing. lets power pass to everything)

But if it sees zero volts leg to leg (or very little) Then it thinks "30 amps I need to keep an eye on the amperage" and yes.... the A/C draws around 13-15 running and that don't leave much for other stuff.

Will switching to a dual breaker system fix it?
IF. the two breakers on on different legs yes. then the EMS will think it's hooked to 50 amps and "Go to sleep"

NOTE you have an indicator "Amps" (it only works on 30 amp sites) keep an eye on it and you may find another load that's drawing
(IT too shuts off when on 50 amps for its monitoring the neutral line and amps on that line means very little on 50 amps)

My 30A EMS will shut down on
1) undervoltage something around 104V
2) open ground
3) open neutral
4) frequency way off from 60Hz
5) reversed hot/neutral
6) over voltage, something around 132V will also not turn on with 240V on my 30A system
7) surge protection

It does NOT shut down on overcurrent, it leaves that to the breaker system. Not seen any 30A systems that do anything about current other than displaying current.

haven't looked at 50A so don't know what they do.