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Old 05-27-2016, 07:49 AM   #1
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15 amp vs. 30 amp

Good morning! I am picking up my tt tomorrow afternoon and I had some questions. I've never owned a tt before, so pardon my ignorance. The tt I am getting has a 30 amp hook-up. I see electrical adapters to plug this into a standard 15 amp outlet. If I do this (I don't have a 30 amp plug at my house and don't want to make one either), do I just have to be careful with what I turn on? I can't imagine the trailer KNOWING that it only has 15 amps available, but maybe I'm wrong.

Joe
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Old 05-27-2016, 07:55 AM   #2
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Joe, it depends on what you're getting. What TT are you picking up? My MH knows when I plug in what it 'thinks' it is and automatically disconnects things that consume too much. Usually the biggest power consumption is the A/C, which I leave off if I'm plugged into a 15 amp.

If you post what you're getting I'm sure that someone that has one will tell you what to expect and how to deal with it.
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Old 05-27-2016, 08:04 AM   #3
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In a MH they have a power management system and some of these may know the difference between 50AMP and 30 AMP service. A TT does not have a PMS so you are correct the TT does not know if you are connected to 15 Amps or 30 Amps. For pre trip cooling of the fridge and running the converter and some lights you will be fine. Do not try and run the AC on the 15 Amp service and you should be fine.
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Old 05-27-2016, 08:04 AM   #4
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Thanks! I'm getting a 2014 Cruise Lite 261BH.

Joe
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Old 05-27-2016, 08:11 AM   #5
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Quote:
Originally Posted by joehbus View Post
Thanks! I'm getting a 2014 Cruise Lite 261BH.

Joe
You can run your "12V Items" don't try your AC or Micro! Youroo!!
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Old 05-27-2016, 08:11 AM   #6
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Here's my suggestion just to get you started.
Plug into 15 AMP ok but
shut off electric water heater and don't try to use the Air Conditioner.
You can use lights and exhaust fans and watch TV and run the fridge.
Also no electric heaters or electric "fireplaces" except when the "flames" are on but the heat is off.
Keep your cord short and we recommend heavy duty 14 GA extension cord
if you have to use one. Old familiar orange 16 GA isn't really up to the task.

Enjoy and by all means
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Old 05-27-2016, 08:15 AM   #7
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15 amp vs. 30 amp

Here's a chart with amp rating so you know what you can use.

normal appliance amp draws


Remember your converter " 1-8 amps" depending on 12v load and battery is a constant that is "always" on.

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Old 05-27-2016, 08:16 AM   #8
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Howdy joehbus and welcome aboard. For those new to RV'ing, I always recommend the following reading to get a basic understanding of the electric systems that are common to most everything and also explains using the adapter you are asking about:


Basic RV Electricity - RV Information (RV Maintenance)

then when you read the above, move on to this one to get an understanding of the converters function (which converts 120 volts AC to 12 volt DC power, as well as recharges your battery)

RV Converters and Amp Draw - RV Information (RV Maintenance)

Then this may or not apply to your RV, depending on what model/brand water heater you have. If you do have the Suburban water heater, this is one of the most confused items and also one that dealers fail to properly explain the operation of to their customers.

Even if you have an Atwood, the part about the bypass/crossover valves in this link below would still apply though.

Suburban's electric switch and much more

Good luck
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Old 05-27-2016, 08:51 AM   #9
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Great info, thanks guys!
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Old 05-27-2016, 09:24 AM   #10
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I strongly urge you to use an extension cord that is 12 guage, not 14 or 16. 12 guage is rated up to 20 amps and most (but not all) household wall outlets are actually on 20 amp breakers. Using undersize wire can lead to voltage drop, overheating, and possibly even fire. I easily run my AC and fridge on household current, just be sure no one turns on the microwave.
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