Overheating/tripping electrical panel 110v AC breakers
Fulltime in a 2019 Keystone Montana High Country 331RL on 50 amp.
I have a monitor for amps and volts on each phase of my breaker panel. Voltage is 120-124 on both phases.
I have 2 rooftop HVAC units. Each pulls about 13amps. If I run one, the 20 amp breaker will get up to about 97 degrees. If I run both, eventually both breakers get up to over 105 and eventually trip due to heat, even with nothing else running that pulls many amps. I talked to the breaker manufacturer. They said the breakers are working correctly. Apparently the heat from one breaker is contributing to the heat of the other breaker.
Breakers are 20amp siemens. 12 AWG wire.
Voltage at both breakers is 124 with ACs off, 122 with both ACs on.
Keystone put the units on breakers that are on the same phase of the panel, right next to each other. I moved them. Now, the units are on different phases of the panel and they have a few breakers between them. That helped some.
This is a new rv. I'm in North Carolina and it's only in the low 90s here. My site is in the sun. This is the first time I have had to run both ACs for at least a few hours. I plan to spend time in places much hotter. But I don't see how I can if the ACs can't keep up with the demand without overheating breakers.
Before all this started happening, I had already fixed all the crappy keystone workmanship. I tightened the lugs where the wires connect to the plug on the side of the trailer, and all the breakers in the panel. I also tightened the lugs on the pedestal and reseated the breakers on the pedestal and in my breaker panel. And tightened all connections DC and AC in the breaker panel.
The panel is in a central area so the front of the panel is in the air conditioned space. The back of the panel is in a cavity that gets some slightly warm air from the cargo area, but not that much.
For now, I took the cover off, placed a small fan to blow on the panel to help dissipate heat better. The fan keeps them nice and cool, but I almost trip over it constantly.
How do other RVs run both HVAC units in 105-110 weather without tripping breakers?
Is this normal? Has anyone else checked the temp of their breakers with an infrared thermometer?
Any advice? Thanks
I have a monitor for amps and volts on each phase of my breaker panel. Voltage is 120-124 on both phases.
I have 2 rooftop HVAC units. Each pulls about 13amps. If I run one, the 20 amp breaker will get up to about 97 degrees. If I run both, eventually both breakers get up to over 105 and eventually trip due to heat, even with nothing else running that pulls many amps. I talked to the breaker manufacturer. They said the breakers are working correctly. Apparently the heat from one breaker is contributing to the heat of the other breaker.
Breakers are 20amp siemens. 12 AWG wire.
Voltage at both breakers is 124 with ACs off, 122 with both ACs on.
Keystone put the units on breakers that are on the same phase of the panel, right next to each other. I moved them. Now, the units are on different phases of the panel and they have a few breakers between them. That helped some.
This is a new rv. I'm in North Carolina and it's only in the low 90s here. My site is in the sun. This is the first time I have had to run both ACs for at least a few hours. I plan to spend time in places much hotter. But I don't see how I can if the ACs can't keep up with the demand without overheating breakers.
Before all this started happening, I had already fixed all the crappy keystone workmanship. I tightened the lugs where the wires connect to the plug on the side of the trailer, and all the breakers in the panel. I also tightened the lugs on the pedestal and reseated the breakers on the pedestal and in my breaker panel. And tightened all connections DC and AC in the breaker panel.
The panel is in a central area so the front of the panel is in the air conditioned space. The back of the panel is in a cavity that gets some slightly warm air from the cargo area, but not that much.
For now, I took the cover off, placed a small fan to blow on the panel to help dissipate heat better. The fan keeps them nice and cool, but I almost trip over it constantly.
How do other RVs run both HVAC units in 105-110 weather without tripping breakers?
Is this normal? Has anyone else checked the temp of their breakers with an infrared thermometer?
Any advice? Thanks
