Why does the AC trip the breaker switch to a 120?

[rldself]

We have a 2016 270S Gas Georgetown Class A Motorhome that is plugged into our house outlet through a surgeprotector from MH and into a power strip in the shed. The AC was running just fine earlier in the summer but one day we turned on the bedroom AC also and it tripped the powerstrip breaker. We have turned off the bedroom AC but can't get the main AC to run without tripping it off also. Can we run the AC of the house 120?

[Retired JSO]

Probably low voltage due to too small wire size in the shed. You should have a dedicated #10 wire circuit to supply electric without a voltage drop.

[Zixxer2Go]

We had a similar problem and our residential AC man put in a "hard start" capacitor which boosts the compressor start. No problems since. Cheap if you do it yourself...$25 or less.

[rracer5]

Originally Posted by rldself

We have a 2016 270S Gas Georgetown Class A Motorhome that is plugged into our house outlet through a surgeprotector from MH and into a power strip in the shed. The AC was running just fine earlier in the summer but one day we turned on the bedroom AC also and it tripped the powerstrip breaker. We have turned off the bedroom AC but can't get the main AC to run without tripping it off also. Can we run the AC of the house 120?

House 120 yes but, what amp circuit are you plugged into? You need a MINIMUM of 30 amps to safely start & run a 15,000 btu A/C (without potential damage to the unit). Running both A/C's would require a MINIMUM of 50 amps to start/run both A/C's (providing they would potentially try to start at the same time).

[HalfBubbleOff]

I agree with the above posts. Voltage drop is your problem, when volts drop, amps go up. Run a dedicated 10/2 with ground and install a 30 amp outlet. This will only allow you to run AC at a time though. For a 50 amp outlet, you will need a 6/2 wire with a 50 amp outlet.

[karrun]

20 AMP or 30 AMP circuit?