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Old 01-18-2013, 02:25 PM   #1
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shore power question

I have an 04 Journey 39K with the Dimensions 2000w inverter. The manual states not to use extension cords for shore power. I presume that i can't use a construction grade 50 foot cord to run just lights and battery charger. I would like to plug into my homes outdoor GFCI outlet with a standard outlet adapter. So question is why not and what are the risks to my MH?
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Old 01-18-2013, 02:33 PM   #2
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It's stated that way because of the many people that will use a badly underrated extension cord to power things. They are covering their a$$ is all. Check the AC voltage at the farthest AC outlet. If the voltage is above 108Vac at the minimum, you are ok. But I would check the temp of the cord and connectors after a few minutes and a couple hours. Any heating would be bad.

Risks to your RV are minimal as millions use an extension cord occasionally. But have to be prudent about the loads they put on it. No AC or MW for instance.
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Old 01-18-2013, 02:37 PM   #3
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Heav duty extension cord and no usage of heavy current draw items such as air conditioning or microwave and you will be fine.
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Old 01-18-2013, 02:45 PM   #4
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X2, I think everyone on this list has used an extension cord at one time or another. Don't run air conditioners and don't make too long of a run and use the biggest cord you can find. You will be just fine.
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Old 01-18-2013, 08:32 PM   #5
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I picked up a 50` heavy duty cord, largest gauge for a 15 amp cord wally world had. I we give it a try and throw a meter on it to see how it runs.
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Old 01-18-2013, 09:23 PM   #6
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I've used a 100' 12AWG extension cord without difficulty with a 2000W Freedom inverter, I was parked at a client's manufacturing plant, they had a 30A outlet they connected me to.

With the Freedom inverter I could turn down the current draw to match the line size so it was easy to keep the current draw to less than 15 to 20A, the lowest voltage I saw was about 110V.
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Old 01-19-2013, 12:01 AM   #7
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I have used a heavy duty 50' extension cord for 25 years.

No problem so far.

I only use it for lights, battery charger and nothing else.
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Old 01-19-2013, 12:33 AM   #8
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Smile

I have run extension cords before just not with the type of systems they have in the MH's. Thanks for helping with my learning curve.
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Old 01-19-2013, 05:56 AM   #9
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I have a 12 gauge 100' extension cord going to mine right now. Haven't had any problems and I'm running two small 1500w space heaters to keep the motorhome warm. Display says I'm pulling 15 amps when they are both on. I'm having a 30 amp Rv plug installed at our new house though so I won't have to worry about it.
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Old 01-19-2013, 06:32 AM   #10
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Quote:
Originally Posted by Deucenut View Post
I have a 12 gauge 100' extension cord going to mine right now. Haven't had any problems and I'm running two small 1500w space heaters to keep the motorhome warm. Display says I'm pulling 15 amps when they are both on. I'm having a 30 amp Rv plug installed at our new house though so I won't have to worry about it.
Hmmmm. 3000w @ 15A = 200vac.

I suspect something is wrong with the numbers provided
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Old 01-19-2013, 08:31 AM   #11
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As noted the problem is low voltage... For this and many add'l reasons you should consider installing a Progressive Ind. (or similar) EMS commonly called a surge protector. It protects against many electrical problems.
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Old 01-19-2013, 09:36 AM   #12
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The extensions sold as "heavy duty" are often not for large electrical loads - they may just have stronger insulation, e.g. for construction sites or yard use. The typical orange "heavy duty" cord that homeowners buy/use is still only 16 gauge wire, which is inadequate to carry large amp loads at most any distance.

If you get a cord rated for the amps you want it to carry, over the distance you will use, there is no risk at all. I carry a 15 ft, 50 amp rated cord with insulation rated for outdoor use, what is commonly called an RV 50A extension. I also have lighter weight 30A cords for use with lesser loads.
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Old 01-19-2013, 08:53 PM   #13
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I use a 25' true 12/3 gauge extension cord for our motor home on a 20 amp breaker. Have used it for many years. Never had a problem. If it's really cold for us, I'll run a couple of ceramic heaters set on low heat. Amp draw is ~13 amps / total watts is ~1500. Voltage reading in coach is 115 volts.
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Old 01-19-2013, 08:58 PM   #14
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Correction to the above post. The heaters are wunning at ~1000 watts. The amp draw is with the inverter, refrigerator, and heaters running. Sorry for the mistype.
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