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Old 05-10-2013, 09:35 PM   #1
Join Date: Jan 2013
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30/50 Amp Sevice.

I have a 1999 Winnebago Adventurer with 30 Amp service. The last resort we stayed at only had 50 Amp. available. I bought a 50 to 30 Amp dog bone and connected to the service. Our next, and current resort,
has 30 and 50 Amp. I have continued to use the 50 Amp service.
The owners manual clearly states that to use both the front and rear A/C units, you must do this only with the 6.5 KW generator. On several occasions, I have run both the ac's at the same time and have had no more than 24 amps draw. My question regarding the 50 Amp set-up is: Am I actually getting more power to the system or is my capacity still 30 Amp? Also, am I out of my mind for doing this? (In reality,I'm certainly somewhat daffy to start with so that would be additionally nuts)


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Old 05-10-2013, 09:44 PM   #2
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Your MH has a 30A circuit breaker protecting it so the maximum you can draw, regardless of what you are plugged into, is 30A. If you run both A/C's sooner or later you will probably trip the breaker when both units have starting surges at the same time. Assuming your circuit breaker works, you aren't risking anything by using the 50A circuit on the pedestal.

That being said, by using the larger breaker on the pedestal your power cord could overload if there was an electrical issue ahead of the MH's 30A breaker. The risk of that is relatively low, but it isn't zero. Using an appropriately rated outlet is probably the safer thing to do in the long run.

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Old 05-10-2013, 09:59 PM   #3
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Your MH could have an energy management system that will only allow one AC compressor be on at a time, while just the fan is running on the other AC then they switch. Even though the compressor might not be engaged, it will still blow cold air for a few minutes after it disengages.
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Old 05-11-2013, 05:59 AM   #4
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Not sure how your A/C system is wired, but, you are still at 30 amps when hooked to 50 amp service with the adapter. It's the way the coach is wired. Mine has two switches for the A/C units. The only way they will both work at the same time with the genset.
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Old 05-11-2013, 06:57 AM   #5
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You are not really gaining anything, but not doing anything dangerous either.

As for running both AC at the same time, you are likely ok. Just don't kick on the microwave or hair dryer in addition.
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Old 05-11-2013, 09:19 AM   #6
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Our Southwind will run both A/C's either 30A or 50A . They start one after the other so not at the same time. The one thermostat we have controls both units. We have run other items that use lots of power & never tripped a breaker. We do have a EMS built into the coach. I guess the EMS does it's job.

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