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Old 05-21-2015, 11:07 PM   #1
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Rookie Question

For the first time ever, we will be taking our 50 amp RV to a park that only has 30 amp service. I understand that this means using only 1 A/C unit, but what other information do I need to know? Also, I could run the generator to power both A/Cs, but do I need to do anything to the shoreline to do that? Thanks for the advice.
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Old 05-21-2015, 11:15 PM   #2
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I'm assuming you have a built in, so not especially. Your transfer switch will automatically flip to gen power when it comes on. You DO want to have loads turned off when you make the switch though, and again when you flip back to shore power.

If you're the better safe than sorry type, you might go unplug before you turn your genset over.
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Old 05-21-2015, 11:36 PM   #3
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Make sure you have a 50 amp to 30 amp cord adapter, otherwise you aren't going to be able to plug into the power pedestal.
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Old 05-21-2015, 11:57 PM   #4
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Originally Posted by afd51 View Post
For the first time ever, we will be taking our 50 amp RV to a park that only has 30 amp service. I understand that this means using only 1 A/C unit, but what other information do I need to know? Also, I could run the generator to power both A/Cs, but do I need to do anything to the shoreline to do that? Thanks for the advice.
True, you only run one A/C due to load. Like someone else said...make sure and pick up a 50 to 30 amp dog bone (adapter) You can run your generator to power both A/C's but since you will be in an RV park they have quiet time, generally from 10pm to 7 or 8am....that may eliminate generator usage.....check with the park. If it is a comfortable climate, run your forward A/C during the day and rear A/C at night....just close the midship door and seal off the area. You will/should be able to run everything else no issue.....check your power monitor on occasion and make sure your not pulling to much load for 30 amps.
Hope this helps, have great trip
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Old 05-22-2015, 08:27 AM   #5
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Some parks prohibit generator use all the time. Power management is the name of the game. I have the progressive industries PMS. It combines surge protection with line protection and gives me a readout of voltage, amps and frequency. There is a table posted in this forum that gives you basic wattage use for all of your systems. You can cypher what your demand is from that. The good news is that if you use to much power on the park 30amp, all you will do is pop the pedestal breaker, unless it doesn't have one!

Here is a link to a basic chart:
http://fltailgators.com/resources/RV...onsumption.pdf
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Old 05-22-2015, 08:48 AM   #6
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You can actually run both A/C's on 30A as long as nothing else is on. You most likely have one 15K and one 13.5K which will draw a combined ~26ish amps, depending upon voltage level. If we camp at a 30A site in the summer we'll run both to get it cooled down and then cycle the 2nd during the hot parts of the day if needed.
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Old 05-22-2015, 08:53 AM   #7
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I have seen a 20 amp and 30 amp to 50 amp cheater. Use the T receptacles 20 amp to power the other leg. I am pretty sure you can get buy using 20 amps on a 13.5 kbtu AC. According to code the power pedestal should have separate breakers sized for the 20 amp receptacle and 30 amp receptacle.
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Old 05-22-2015, 09:08 AM   #8
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I have seen a 20 amp and 30 amp to 50 amp cheater. Use the T receptacles 20 amp to power the other leg. I am pretty sure you can get buy using 20 amps on a 13.5 kbtu AC. According to code the power pedestal should have separate breakers sized for the 20 amp receptacle and 30 amp receptacle.
Yeah. I bought one of those with that in mind, but it won't work. It can't be used on a GFCI circuit without tripping it, and every single 20A outlet I've seen has had either a GFCI circuit breaker or outlet installed. Most often it is a GFCI breaker. I guess one could carry a 20A breaker of the few most common types and do a quick swap if staying for an extended period.
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Old 05-22-2015, 11:40 AM   #9
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Thank you all for the advice. I suspected that the transfer switch would handle this, but wanted to be sure. I do have the 50 to 30 dogbone, but have not read positive things about the 30 + 20 cheater. I bought the progressive PMS system and will get it installed before our next trip.
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Old 05-22-2015, 11:55 AM   #10
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One other thing I have ran into is if you are running the AC you cannot run the microwave without tripping the 30 Amp breaker.
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