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Ken & Joyce · 01-20-2009, 02:51 PM

I can not open the 110V circuit breaker for my number 2 compresser. (Tru-air basement heat pump) When I open it up it trips the main breaker and shuts everythin off in the RV. The two breakers are ganged together. Don't know the reason for this or if this is normal?

20 amp (A/C #1)
50 amp (Main)
[ (ganged together)
50 amp (A/C #2)
20 amp (Refrigerator/Conv.)
15 amp (Microwave)
15 amp (Recps 1)
15 amp (Recps 2)
15 amp (recps 3)
15 amp (Washer/Dryer
20 amp (Water Heater)

DancinCampers · 01-20-2009, 03:08 PM

It's not like mine, I have separate 20amp breaker for each compressor.

I would not think the way yours is would be safe. You would have 20amp wiring protected by a 50amp breaker.

Maybe your 2nd compressor is on one of the other 20amp breakers, just not marked as such.

My 2 50 amp breakers are ganged.

tomsm · 01-21-2009, 08:26 AM

Sounds like something got mislabeled on yours. The 2 ganged 50A breakers are main input (a breaker on each leg of the 50A power input). The 20A breaker just to the right of the ganged 50s should be comp #2. If you turn off comp #2, be sure to wait 3 minutes to allow compressor head pressure to bleed down before resetting the breaker.

MrTransistor · 01-21-2009, 09:13 AM

Hi Ken & Joyce,

According to the wiring diagram for all of the 2003 Adventurers, there was an option for 30 Amps. or 50 Amps. with or without washer dryer. With the 30 Amp. option, the AC #2 is routed from the 30 Amp. main through the (#3) 20 Amp. breaker, then to the transfer switch and on to the A/C #2.

50 Amp.:

20 amp (A/C #1)
50 amp (Main)
[(ganged together)]
50 amp (Main)
20 amp (A/C #2.)
15 amp (Refrigerator & Converter)
15 amp (Microwave)
15 amp (Recps)
15 amp (Recps)
15 amp (Recps)
20 amp (washer/dryer or water heater)
20 amp (Water Heater)

30 Amp.:

20 amp (A/C #1)
30 amp (Main)
20 amp (A/C #2)
15 amp (Refrigerator & Converter)
15 amp (Microwave)
15 amp (Recps)
15 amp (Recps)
15 amp (Recps)
20 amp (washer/dryer or water heater)
20 amp (Water Heater)

You probably know this full well that if your coach has a power cord that has 4 prongs then that is a 50 Amp. cord. If it has 3 prongs then it would be 30 Amp. It is possible that the coach was delivered with a 30 Amp. setup and somewhere along the line the power cord was replaced with a 50 Amp. cord. Since you list the breaker panel as having two 50 Amp. breakers then I would assume that the breakers and labels got changed but maybe someone didn’t realize that there was also a wiring change and didn’t rewire it at all or did it improperly. That is the only explanation I can see for the A/C # 2 being ganged to the main (#2 from the left) breaker. Tell us exactly what model of coach you have and if it was pre-owned or had dealer installed electrical options. Then we can dig a little deeper for you.