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Old 08-17-2013, 04:08 PM   #1
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50 Amp service at home

I just bought a new-to-us 2005 50A Southwind. I had already installed 30A shore power at home for our older 30A Itasca. Now I need to support the Southwind. Do I really need to install 6 gage wire to a new outlet, or can I continue to use an adapter to the 30A outlet with its 10 gage wire if I let the energy monitor system control the A/C units. As I understand it, the system will not let both A/C's operate at the same time on 30A, but will alternate them to limit current draw.

Ken, Judy, and the Angels--2005 Fleetwood Southwind--2008 Cargo Trailer--2003 EZGO Golf Cart
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Old 08-17-2013, 04:14 PM   #2
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Exclamation 50 amp service

As long as your energy management system is doing what it is supposed to (load shedding) then you should be okay with a 30 amp service. The only difference I see is most RV's with a 30 amp service, just have the one A/C unit. Obviously the RV's with 50 amp service have two A/C units, so that you can run them both at the same time. If your EMS should fail, and both A/C's kick in, you'll just trip your breaker. Thought...turn off the breaker in your RV feeding the second unit.

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Old 08-17-2013, 04:48 PM   #3
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I think the gauge of the wire is dependent on the length of the run but assuming your 30 amp was installed correctly you should be OK. Sometimes it can be tough to get even one AC running on 30 amp if there are other things in use.

Good luck.

Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

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Old 08-17-2013, 05:05 PM   #4
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Depends on what you do with your coach while it's at home. If, for instance, you're using as a guest house and you want it to be fully functional, then you'll need the 50A hookup, and the 50A hookup will require #6 wire.

If, on the other hand, you just want to keep the fridge cold and the batteries charged, then the 30A with your EMS will be fine. In fact, for my guests (who I don't want to get TOO comfortable) I'd just use the 30A and let the EMS decide what can run and what can't.
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Old 08-17-2013, 05:54 PM   #5
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I have done exactly that for the last 6 months in Houston, Texas. I've had no issues. It will even run both ACs. My Bounder with 30A service ran both ACs. No worries it will work fine if everything on the S&B is wired correctly. I run both ACs the fridge, hot water heater and even occasionally pop some popcorn in the microwave.
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Old 08-17-2013, 06:06 PM   #6
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30 amp. service at home will work for you unless you feel the need to fire everything up all at once............ then you will need to re-wire and install a 50 amp. service.
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Old 08-17-2013, 06:07 PM   #7
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I think you will find your EMS will allow both AC units on 30a service, shedding one if another large power draw comes on (such as microwave). This is how my Fleetwood PA EMS works. When on 50a service it would not shed an AC in the same scenario.

So your 30a service is fine unless you really feel the need to run most everything at once.
Vince and Susan
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Old 08-17-2013, 07:02 PM   #8
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Thanks everyone. This is my first experience with 50A and with EMS. I knew you would have the right answer for me.

As to the 30A Itasca, It came with a switch that would let me select either A/C. I replaced that with a Pulse-Air that automatically alternated the two units on a 7/5 minute cycle. I later separated the rear A/C power and made it capable of running off the gennie, separate shore power, or the Pulse-Air. Now I have to explain how all that works to our daughter who is buying it.

Ken, Judy, and the Angels--2005 Fleetwood Southwind--2008 Cargo Trailer--2003 EZGO Golf Cart
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