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Old 04-26-2014, 11:36 AM   #1
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30 amp extension cord

Is there a concern about using a 25' extension cord with my 25' 30 amp shore power cord . Is a total of 50' create a potential electrical problem due to the length of the 2 cords. Sometimes I need to use both to reach the electrical hookup.
Also is there a concern plugging the 30 amp power cord to a 50 amp supply with a 50 amp adapter causing damage to the electrical system in the trailer
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Old 04-26-2014, 11:44 AM   #2
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As long as the extension is of sufficient quality to handle the load, you should have no problem. I use a 25 ft extension at home since my plug it too far away.

Using 50 amp service with an adapter should not be an issue since the trailer has a 30 amp breaker for protection.
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Old 04-26-2014, 09:48 PM   #3
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Originally Posted by rbourdage View Post
Is there a concern about using a 25' extension cord with my 25' 30 amp shore power cord . Is a total of 50' create a potential electrical problem due to the length of the 2 cords. Sometimes I need to use both to reach the electrical hookup.
There's nothing wrong with using an extension cord when you need it. There will be some voltage drop, but nothing significant.

I carry a 50' 30a extension cord and a 100' 20a extension cord. I rarely use them, but when they are necesary, well, they're necessary.

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Also is there a concern plugging the 30 amp power cord to a 50 amp supply with a 50 amp adapter causing damage to the electrical system in the trailer
Nope, find something else to worry about
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Old 04-26-2014, 10:30 PM   #4
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30 amp extension cord

One of the guys that I RV with says that you should have at least a 10 gauge extension cord to carry the amperage without getting hot. I have a 25' 10 gauge cord that I use occasionally, never had a problem.
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Old 04-27-2014, 12:07 AM   #5
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30 amp extension cord

I have used two 25' cords, 50', no problem.

In reality, in regular daily use , if a person doesn't run two space heaters at a time, (or a hair dryer and the a /c at the same time), it is generally rare that a camper with only one a/c will draw more than half of those 30 allocated amps but for brief periods.
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Old 04-27-2014, 01:54 AM   #6
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A lot of air conditioners want 30 amps to run, or at least to start. Mine shuts down if it doesn't have 30 amps, which means using 10 gauge wire. and in my case I have to fire up the noisy generator if I want to test the air conditioner cause I only have a 25 amp circuit out back with 12 gauge wire.
Check your cord ends, the #10 wire won't get hot but the ends might only be good for 20 amp.
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Old 04-27-2014, 01:58 AM   #7
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30 amp extension cord

I don't know, my 40 year old unit will run all night and all day on a 15 amp breaker, but not with a hair dryer too.
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Old 04-27-2014, 02:07 AM   #8
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I don't know, my 40 year old unit will run all night and all day on a 15 amp breaker, but not with a hair dryer too.
And others will burn up the compressor with less than 30 amp. Which would you advise, tell them to go for 15 amp and try it, see if they let the smoke out? Or caution that a lot of air conditioners need 30 amps.
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Old 04-27-2014, 02:11 AM   #9
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30 amp extension cord

if the compressor needs more that the 15 amp circuit breaker can deliver it will trip the circuit.

A circuit breaker isn't analog, it is digital. A one or a zero, nothing in between.
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Old 04-27-2014, 02:20 AM   #10
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Anyway, my point was to illustrate that most campers rarely use all of a 30 amp service and when they do it is only briefly, to the end that a longish extension cord, properly sized, is not going to be an issue really.
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Old 04-27-2014, 05:37 AM   #11
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Anyway, my point was to illustrate that most campers rarely use all of a 30 amp service and when they do it is only briefly, to the end that a longish extension cord, properly sized, is not going to be an issue really.
This is true ,but people don't think when making toast ,and coffee at the same time your now at maximum of a 30amp circuit if you turn on something else ,like if a,c went on or hot water heater turned (when on electric ) or if microwave was used ,the main breaker will trip, I think the rv industry needs to get up to speed and make all r.v. 50 amp service plus all campgrounds should offer 15amps service for tents or rv under 16 foot and 50amps service for all others ,don't get me wrong I'm very energy conscious ( I have solar at home ) but I believe in doing it right . (Today with all the electric gadgets ) Morgan made some good points you can safely use a extension cord but it all depends on the continuous power used , people need to learn to read labels on appliances, and remember watts =volts x amps and on some startup appliances like a.c compressors they can take more then what label says sometimes double or more.
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Old 04-27-2014, 06:46 AM   #12
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The only cord to use is a ready made 30 amp cord, not a lesser cord used with an adaptor. Jim
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Old 04-27-2014, 06:54 AM   #13
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You learn what to use and not at the same time when plugged into a 30 amp breaker cause it will trip it when you try to use to much. Well, if you use the 50 amp breaker, that does not happen and you WILL burn (melt) the end plug ask me how I know So yes, you can use the 50 amp breaker with an adapter, but still be careful of what you have turned on.
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Old 04-27-2014, 07:15 AM   #14
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I have been running my AS for 10 years on a 50' 10 ga extension cord.
Only way I can have it parked under the tree and still reach the power pole.
About the only time it could be an issue is when you are running the AC.
But I do pay attention and don't run the AC - and the fridge on electric - and a lot of lights at the same time.
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